OPA2206 [TI]

OPA2206 Input-Overvoltage-Protected, 2-μV, 0.04-μV/°C, Low-Power Precision Op Amp;
OPA2206
型号: OPA2206
厂家: TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
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OPA2206 Input-Overvoltage-Protected, 2-μV, 0.04-μV/°C, Low-Power Precision Op Amp

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OPA2206  
SBOSA11A – MARCH 2020 – REVISED MARCH 2021  
OPA2206 Input-Overvoltage-Protected, 2-µV, 0.04-µV/°C, Low-Power  
Precision Op Amp  
1 Features  
3 Description  
Integrated input overvoltage protection up to ±40 V  
beyond supplies  
e-trimoperational amplifier performance  
– Low offset voltage: 15 µV (max)  
– Low offset voltage drift: ±0.2 µV/°C (max)  
Super beta inputs  
– Input bias current: 0.4 nA (max)  
– Input current noise: 110 fA/√Hz  
Low noise  
– 0.1-Hz to 10-Hz: 0.2 µVPP  
– Voltage noise: 8 nV/√Hz  
AOL, CMRR, and PSRR: > 126 dB (full  
temperature range)  
Gain bandwidth product: 3.6 MHz  
Low quiescent current: 220 µA (max)  
Slew rate: 4 V/µs  
Overload power limiter  
Rail-to-rail output  
EMI/RFI filtered inputs  
Wide supply: 4.5 V to 36 V  
Temperature range: –40°C to +125°C  
Available in high grade (OPA2206) and standard  
grade (OPA2206A)  
The OPA2206 is the next generation of the industry-  
standard OPAx277 family with the additional feature  
of input overvoltage protection. The device is a  
precision bipolar, e-trim operational amplifier with  
super beta inputs. The device uses TI’s proprietary  
trimming technology to achieve an impressive input  
offset voltage of ±2 μV (typ) and an input offset  
voltage drift of ±0.04 μV/°C (typ). The input  
overvoltage protection activates when the input signal  
exceeds the supply range and offers protection up to  
40 V beyond either supply. This feature eliminates the  
need for external cumbersome circuitry to prevent the  
amplifier from damages.  
Designed on a bipolar process, the OPA2206  
provides a superb speed-to-power ratio of 3.6 MHz  
for a mere 220 μA. The device also achieves a low  
voltage noise density of only 8 nV/√Hz at 1 kHz.  
Thanks to super-beta inputs, the OPA2206 has a very  
low input bias current of 100 pA (typ) and a current  
noise density of 110 fA/√Hz.  
The high performance of the OPA2206 makes this  
device an excellent choice for systems requiring  
high precision and low power consumption, such as  
high-density analog input modules in programmable  
logic controllers, field and portable instrumentation  
systems, and source measurement units. The  
OPA2205 is a related product with the same op amp  
core, without the input protection but with improved  
broadband noise (7.2 nV/√Hz).  
2 Applications  
Analog input module  
Mixed module (AI,AO,DI,DO)  
Lab and field Instrumentation  
Source measurement unit (SMU)  
Digital multimeter (DMM)  
Train control and management  
String inverter  
Device Information  
PART NUMBER  
OPA2206  
PACKAGE(1)  
BODY SIZE (NOM)  
VSSOP (8)  
3.00 mm × 3.00 mm  
(1) For all available packages, see the package option  
addendum at the end of the data sheet.  
Data acquisition (DAQ)  
7.5  
80 k  
20 k  
±10 V  
12 V  
5
12 V  
2.2 nF  
2.5  
0
100 nF  
GND  
100 nF  
GND  
+
3.74 k  
11.8 k  
2.2 nF  
6.65 k  
+
Output  
-2.5  
-5  
OPA2206  
TA = –40°C  
TA = 25°C  
TA = 85°C  
TA = 125°C  
2 V  
OPA2206  
330 pF  
GND  
100 nF  
GND  
100 nF  
GND  
12 V  
-7.5  
-60  
12 V  
GND  
-40  
-20  
0
20  
40  
60  
Common-mode Voltage (V)  
OPA2206 Typical Application  
OPA2206 Input Overvoltage Protection  
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
 
 
 
OPA2206  
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SBOSA11A – MARCH 2020 – REVISED MARCH 2021  
Table of Contents  
1 Features............................................................................1  
2 Applications.....................................................................1  
3 Description.......................................................................1  
4 Revision History.............................................................. 2  
5 Pin Configuration and Functions...................................3  
6 Specifications.................................................................. 4  
6.1 Absolute Maximum Ratings ....................................... 4  
6.2 ESD Ratings .............................................................. 4  
6.3 Recommended Operating Conditions ........................4  
6.4 Thermal Information: OPA2206 ................................. 4  
6.5 Electrical Characteristics: VS = ±5 V ..........................5  
6.6 Electrical Characteristics: VS = ±15 V ........................7  
6.7 Typical Characteristics................................................9  
7 Parameter Measurement Information..........................18  
7.1 Typical Specifications and Distributions....................18  
8 Detailed Description......................................................19  
8.1 Overview...................................................................19  
8.2 Functional Block Diagram.........................................19  
8.3 Feature Description...................................................20  
8.4 Device Functional Modes..........................................22  
9 Application and Implementation..................................23  
9.1 Application Information............................................. 23  
9.2 Typical Applications.................................................. 23  
10 Power Supply Recommendations..............................26  
11 Layout...........................................................................26  
11.1 Layout Guidelines................................................... 26  
11.2 Layout Example...................................................... 27  
12 Device and Documentation Support..........................28  
12.1 Device Support....................................................... 28  
12.2 Receiving Notification of Documentation Updates..28  
12.3 Support Resources................................................. 28  
12.5 Electrostatic Discharge Caution..............................28  
12.6 Glossary..................................................................28  
13 Mechanical, Packaging, and Orderable  
Information.................................................................... 28  
4 Revision History  
Changes from Revision * (April 2020) to Revision A (March 2021)  
Page  
Changed OPA2206 from advanced information (preview) to production data (active).......................................1  
Changed both Electrical Characteristics tables to show differentiated performance between OPA2206 (high  
grade) and OPA2206A (standard grade)............................................................................................................5  
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SBOSA11A – MARCH 2020 – REVISED MARCH 2021  
5 Pin Configuration and Functions  
OUT A  
œIN A  
+IN A  
Vœ  
1
2
3
4
8
7
6
5
V+  
OUT B  
œIN B  
+IN B  
Not to scale  
Figure 5-1. DGK (8-Pin VSSOP) Package, Top View  
Table 5-1. Pin Functions  
PIN  
I/O  
DESCRIPTION  
NAME  
NO.  
3
+IN A  
–IN A  
+IN B  
–IN B  
I
I
Noninverting input, channel A  
Inverting input, channel A  
Noninverting input, channel B  
Inverting input, channel B  
Output, channel A  
2
5
I
6
I
OUT A  
OUT B  
V+  
1
O
O
7
Output, channel B  
8
Positive (highest) power supply  
Negative (lowest) power supply  
V–  
4
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SBOSA11A – MARCH 2020 – REVISED MARCH 2021  
6 Specifications  
6.1 Absolute Maximum Ratings  
over operating free-air temperature range (unless otherwise noted)(1)  
MIN  
MAX  
40  
UNIT  
V
Single supply  
VS  
Supply voltage, Vs = (V+) – (V–)  
Dual supply  
±20  
Signal input pin voltage  
Output short-circuit(2)  
Operating temperature  
Junction temperature  
Storage temperature, Tstg  
(V–) – 40  
(V+) + 40  
V
Continuous  
TA  
–40  
–65  
150  
150  
150  
°C  
°C  
°C  
TJ  
TSTG  
(1) Operation outside the Absolute Maximum Ratings may cause permanent device damage. Absolute Maximum Ratings do not imply  
functional operation of the device at these or any other conditions beyond those listed under Recommended Operating Conditions.  
If used outside the Recommended Operating Conditions but within the Absolute Maximum Ratings, the device may not be fully  
functional, and this may affect device reliability, functionality, performance, and shorten the device lifetime.  
(2) Short-circuit to ground, one amplifier per package.  
6.2 ESD Ratings  
VALUE  
±2000  
±1000  
UNIT  
Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1)  
V(ESD)  
Electrostatic discharge  
V
Charged-device model (CDM), per JEDEC specification JESD22-C101(2)  
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.  
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.  
6.3 Recommended Operating Conditions  
over operating free-air temperature range (unless otherwise noted)  
MIN  
4.5  
NOM  
MAX  
36  
UNIT  
V
Single supply  
Dual supply  
VS  
TA  
Supply voltage, VS = (V+) – (V–)  
Operating temperature  
±2.25  
–40  
±18  
125  
°C  
6.4 Thermal Information: OPA2206  
OPA2206  
DGK (VSSOP)  
8 PINS  
175.6  
THERMAL METRIC(1)  
UNIT  
RθJA  
Junction-to-ambient thermal resistance  
/W  
/W  
/W  
/W  
/W  
/W  
RθJC(top)  
RθJB  
Junction-to-case (top) thermal resistance  
Junction-to-board thermal resistance  
63.1  
97.2  
ψJT  
Junction-to-top characterization parameter  
Junction-to-board characterization parameter  
Junction-to-case (bottom) thermal resistance  
7.8  
ψJB  
95.5  
RθJC(bot)  
N/A  
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application  
report.  
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6.5 Electrical Characteristics: VS = ±5 V  
at TA = 25°C, VCM = VOUT = midsupply, and RL = 10 kΩ connected to VS / 2 (unless otherwise noted)  
PARAMETER  
TEST CONDITIONS  
MIN  
TYP  
MAX  
UNIT  
OFFSET VOLTAGE  
±2  
±15  
±25  
OPA2206  
TA = –40°C to +125°C  
VOS  
Input offset voltage  
μV  
μV/°C  
μV/V  
dB  
±8  
±50  
OPA2206A  
TA = –40°C to +125°C  
±80  
OPA2206, TA = –40°C to +125°C  
OPA2206A, TA = –40°C to +125°C  
±0.04  
±0.08  
±0.05  
±0.2  
±0.5  
±0.25  
±0.5  
±0.5  
±1  
dVOS/dT  
PSRR  
Input offset voltage drift  
OPA2206,  
VS = ±2.25 V to ±18 V  
TA = –40°C to +125°C  
Power supply rejection  
ratio  
±0.05  
OPA2206A,  
VS = ±2.25 V to ±18 V  
TA = –40°C to +125°C  
f = DC  
130  
110  
Channel separation  
f = 100 kHz  
INPUT BIAS CURRENT  
±0.1  
±0.1  
±0.1  
±0.4  
±0.6  
±0.9  
±0.5  
±0.75  
±1  
OPA2206  
TA = 0°C to 85°C  
TA = –40°C to +125°C  
IB  
Input bias current  
nA  
nA  
OPA2206A  
TA = 0°C to 85°C  
TA = –40°C to +125°C  
±0.4  
±0.5  
±0.6  
IOS  
Input offset current  
Input voltage noise  
TA = 0°C to 85°C  
TA = –40°C to +125°C  
NOISE  
en p-p  
f = 0.1 Hz to 10 Hz  
f = 10 Hz  
0.2  
8.4  
8.1  
8
μVPP  
nV/√Hz  
fA/√Hz  
V
en  
Input voltage noise density f = 100 Hz  
f = 1 kHz  
in  
Input current noise  
f = 1 kHz  
110  
INPUT VOLTAGE  
VCM  
Common-mode voltage  
(V–) + 1  
124  
(V+) – 1.4  
OPA2206, (V–) + 1 V < VCM < (V+) – 1.4 V,  
TA = –40°C to +125°C  
140  
140  
Common-mode rejection  
ratio  
CMRR  
dB  
OPA2206A, (V–) + 1 V < VCM < (V+) – 1.4 V,  
TA = –40°C to +125°C  
124  
INPUT OVERVOLTAGE  
Input overvoltage  
TA = –40to +125℃  
(V–) – 40  
(V+) + 40  
10  
V
protection  
VS = 0 V,  
(V–) – 40 V < VCM < (V+) +  
40 V  
4.8  
Input current in overvoltage  
protected mode  
mA  
TA = –40to +125℃  
See typical curves  
INPUT IMPEDANCE  
ZID  
Differential  
9 || 4.4  
MΩ || pF  
GΩ || pF  
ZICM  
Common-mode  
300 || 4.4  
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UNIT  
SBOSA11A – MARCH 2020 – REVISED MARCH 2021  
6.5 Electrical Characteristics: VS = ±5 V (continued)  
at TA = 25°C, VCM = VOUT = midsupply, and RL = 10 kΩ connected to VS / 2 (unless otherwise noted)  
PARAMETER  
TEST CONDITIONS  
MIN  
TYP  
MAX  
OPEN-LOOP GAIN  
OPA2206,  
RL = 10 kΩ  
126  
126  
126  
126  
132  
130  
132  
130  
TA = –40°C to +125°C,  
(V–) + 200 mV < VO < (V+)  
– 200 mV  
RL = 2 kΩ  
RL = 10 kΩ  
RL = 2 kΩ  
AOL  
Open-loop voltage gain  
dB  
OPA2206A,  
TA = –40°C to +125°C,  
(V–) + 200 mV < VO < (V+)  
– 200 mV  
FREQUENCY RESPONSE  
GBW  
SR  
Gain-bandwidth product  
3.6  
3.2  
67  
MHz  
V/μs  
Slew rate  
4-V step, G = –1  
Phase margin  
RL = 10 kΩ, CL = 25 pF  
degrees  
Falling  
Rising  
2.2  
2.8  
0.3  
To 0.024% (12-bit),  
4-V step, G = 1, CL = 30 pF  
tS  
Settling time  
μs  
Overload recovery time  
G = –10  
μs  
%
Total harmonic distortion +  
noise  
THD+N  
VO = 5 VPP, G = +1, f = 1 kHz, RL = 2 kΩ  
0.0004  
OUTPUT  
RL = 10 kΩ  
AOL > 126 dB  
(V–) + 0.2  
(V–) + 0.2  
(V–) + 0.2  
(V+) – 0.2  
(V+) – 0.2  
(V+) – 0.2  
Voltage output swing from  
rail  
RL = 2 kΩ  
V
TA = –40°C to +125°C, RL = 10 kΩ  
ISC  
Short-circuit current  
Capacitive load drive  
±25  
mA  
CLOAD  
See Typical Characteristics  
See Typical Characteristics  
Open-loop output  
impedance  
RO  
POWER SUPPLY  
220  
240  
310  
Quiescent current per  
amplifier  
IQ  
IO = 0 mA  
μA  
TA = –40°C to +125°C  
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6.6 Electrical Characteristics: VS = ±15 V  
at TA = 25°C, VCM = VOUT = midsupply and RL = 10 kΩ connected to VS / 2 (unless otherwise noted)  
PARAMETER  
TEST CONDITIONS  
MIN  
TYP  
MAX  
UNIT  
OFFSET VOLTAGE  
±2  
±15  
±25  
OPA2206  
TA = –40°C to +125°C  
VOS  
Input offset voltage  
μV  
μV/°C  
μV/V  
dB  
±8  
±50  
OPA2206A  
TA = –40°C to +125°C  
±80  
OPA2206, TA = –40°C to +125°C  
OPA2206A, TA = –40°C to +125°C  
±0.04  
±0.08  
±0.05  
±0.2  
±0.5  
±0.25  
±0.5  
±0.5  
±1  
dVOS/dT  
PSRR  
Input offset voltage drift  
OPA2206,  
VS = ±2.25 V to ±18 V  
TA = –40°C to +125°C  
Power supply rejection  
ratio  
±0.05  
OPA2206A,  
VS = ±2.25 V to ±18 V  
TA = –40°C to +125°C  
f = DC  
130  
110  
Channel separation  
f = 100 kHz  
INPUT BIAS CURRENT  
±0.1  
±0.1  
±0.1  
±0.4  
±0.6  
±0.9  
±0.5  
±1  
OPA2206  
TA = 0°C to 85°C  
TA = –40°C to +125°C  
IB  
Input bias current  
nA  
nA  
OPA2206A  
TA = 0°C to 85°C  
TA = –40°C to +125°C  
±1.2  
±0.4  
±0.8  
±0.9  
IOS  
Input offset current  
Input voltage noise  
TA = 0°C to 85°C  
TA = –40°C to +125°C  
NOISE  
en p-p  
f = 0.1 Hz to 10 Hz  
f = 10 Hz  
0.2  
8.4  
8.1  
8
μVPP  
nV/√Hz  
fA/√Hz  
V
en  
Input voltage noise density f = 100 Hz  
f = 1 kHz  
in  
Input current noise  
f = 1 kHz  
110  
INPUT VOLTAGE  
VCM  
Common-mode voltage  
(V–) + 1  
126  
(V+) – 1.4  
OPA2206,  
(V–) + 1 V < VCM < (V+) –  
1.4 V  
140  
140  
140  
140  
TA = –40°C to +125°C  
TA = –40°C to +125°C  
124  
126  
124  
Common-mode rejection  
ratio  
CMRR  
dB  
OPA2206A,  
(V–) + 1 V < VCM < (V+) –  
1.4 V  
INPUT OVERVOLTAGE  
Input overvoltage  
TA = –40to +125℃  
(V–) – 40  
(V+) + 40  
10  
V
protection  
VS = 0 V,  
(V–) – 40 V < VCM < (V+) +  
40 V  
4.8  
Input current in overvoltage  
protected mode  
mA  
TA = –40°C to +125°C  
See typical curves  
INPUT IMPEDANCE  
ZID  
Differential  
9 || 4.4  
MΩ || pF  
GΩ || pF  
ZICM  
Common-mode  
300 || 4.3  
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UNIT  
SBOSA11A – MARCH 2020 – REVISED MARCH 2021  
6.6 Electrical Characteristics: VS = ±15 V (continued)  
at TA = 25°C, VCM = VOUT = midsupply and RL = 10 kΩ connected to VS / 2 (unless otherwise noted)  
PARAMETER  
TEST CONDITIONS  
MIN  
TYP  
MAX  
OPEN-LOOP GAIN  
RL = 10 kΩ,  
(V–) + 200 mV < VO < (V+) –  
200 mV  
132  
132  
126  
126  
135  
135  
132  
130  
OPA2206,  
TA = –40°C to +125°C  
RL = 2 kΩ,  
(V–) + 350 mV < VO < (V+) –  
350 mV  
AOL  
Open-loop voltage gain  
dB  
RL = 10 kΩ,  
(V–) + 200 mV < VO < (V+) –  
200 mV  
OPA2206A,  
TA = –40°C to +125°C  
RL = 2 kΩ,  
(V–) + 350 mV < VO < (V+) –  
350 mV  
FREQUENCY RESPONSE  
GBW  
SR  
Gain-bandwidth product  
CL = 30 pF  
3.6  
4
MHz  
V/μs  
Slew rate  
10-V step, G = –1  
RL = 10 kΩ, CL = 25 pF  
Phase margin  
67  
2.8  
degrees  
To 0.024% (12-bit),  
10-V step, G = 1,  
CL = 30 pF  
Falling  
Rising  
tS  
Settling time  
μs  
4.5  
0.2  
Overload recovery time  
G = –10  
μs  
%
Total harmonic distortion +  
noise  
THD+N  
VO = 5 VPP, G = +1, f = 1 kHz, RL = 2 kΩ  
0.0004  
OUTPUT  
RL = 10 kΩ  
AOL > 126 dB  
(V–) + 0.2  
(V–) + 0.35  
(V–) + 0.2  
(V+) + 0.2  
(V+) + 0.35  
(V+) + 0.2  
Voltage output swing from  
rail  
RL = 2 kΩ  
V
TA = –40°C to +125°C, RL = 10 kΩ  
ISC  
Short-circuit current  
Capacitive load drive  
±25  
mA  
CLOAD  
See Typical Characteristics  
See Typical Characteristics  
Open-loop output  
impedance  
RO  
POWER SUPPLY  
220  
240  
310  
Quiescent current per  
amplifier  
IQ  
IO = 0 mA  
μA  
TA = –40°C to +125°C  
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6.7 Typical Characteristics  
at TA = 25°C, VS = ±15 V, VCM = VOUT = midsupply, and RL = 10 kΩ (unless otherwise noted)  
Table 6-1. Table of Graphs  
DESCRIPTION  
FIGURE  
Figure 6-1  
Figure 6-2  
Figure 6-3  
Figure 6-4  
Figure 6-5  
Figure 6-6  
Figure 6-7  
Figure 6-8  
Figure 6-9  
Offset Voltage Production Distribution at 25°C  
Offset Voltage Distribution at 125°C  
Offset Voltage Distribution at -40°C  
Offset Voltage vs Temperature  
Offset Voltage Drift Production Distribution  
Offset Voltage vs Output Voltage  
Offset Voltage vs Power Supply Voltage  
Power-Supply Rejection Ratio vs Temperature  
Power-Supply and Common-Mode Rejection Ratio vs Frequency  
Common-Mode Rejection Ratio vs Temperature  
Offset Voltage vs Common-Mode Voltage  
Offset Voltage vs Vcm at Low Supply  
Offset Voltage vs Vcm at High Supply  
Open-Loop Gain and Phase vs Frequency  
Open-Loop Gain vs Distance from Supply  
Open-Loop Gain vs Temperature  
Figure 6-10  
Figure 6-11  
Figure 6-12  
Figure 6-13  
Figure 6-14  
Figure 6-15  
Figure 6-16  
Figure 6-17  
Figure 6-18  
Figure 6-19  
Figure 6-20  
Figure 6-21  
Figure 6-22  
Figure 6-23  
Figure 6-24  
Figure 6-25  
Figure 6-26  
Figure 6-27  
Figure 6-28  
Figure 6-29  
Figure 6-30  
Figure 6-31  
Figure 6-32  
Figure 6-34  
Figure 6-34  
Figure 6-35  
Figure 6-36  
Figure 6-37  
Figure 6-38  
Figure 6-39  
Figure 6-40  
Figure 6-41  
Figure 6-42  
Figure 6-43  
Figure 6-44  
Figure 6-45  
Figure 6-46  
Closed-Loop Gain vs Frequency  
Input Bias Production Distribution  
Input Bias vs Common-Mode Voltage  
Input Bias and Input Offset Current vs Temperature  
Input Bias vs. Overvoltage Protected Common Mode Range  
Input Offset Current Production Distribution  
Voltage Noise Density vs Frequency  
0.1-Hz To 10-Hz Noise  
Total Harmonic Distortion + Noise Ratio vs Frequency  
Total Harmonic Distortion + Noise Ratio vs Output Amplitude  
Current Noise vs Frequency  
Maximum Output Voltage vs Frequency  
Output Voltage Swing vs Output Sourcing Current  
Output Voltage Swing vs Output Sinking Current  
Open-Loop Output Impedance vs Frequency  
No Phase Reversal  
Small-Signal Overshoot vs Capacitive Load, Gain = +1  
Small-Signal Overshoot vs Capacitive Load, Gain = -1  
Phase Margin vs Capacitive Load  
Positive Overload Recovery, Gain = -1  
Negative Overload Recovery, Gain = -1  
Settling Time  
Small-Signal Step Response, Gain = +1  
Small-Signal Step Response, Gain = -1  
Large-Signal Step Response, Gain = +1  
Large-Signal Step Response, Gain = -1  
Short-Circuit Current vs Temperature  
Electromagnetic Interference Rejection (EMIRR)  
Quiescent Current vs Supply Voltage  
Quiescent Current vs Temperature  
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6.7 Typical Characteristics  
at TA = 25°C, VS = ±15 V, VCM = VOUT = midsupply, and RL = 10 kΩ (unless otherwise noted)  
20  
18  
16  
14  
12  
10  
8
25  
20  
15  
10  
5
6
4
2
0
0
-10  
-8  
-6  
-4  
-2  
0
2
4
6
8
10  
-20  
-15  
-10  
-5  
0
5
10  
15  
20  
125  
15  
Input-referenced Offset Voltage (µV)  
Offset Voltage (µV)  
Figure 6-1. Offset Voltage Production Distribution at 25°C  
Figure 6-2. Offset Voltage Distribution at 125°C  
20  
20  
10  
0
15  
10  
5
+3 Sigma  
–3 Sigma  
-10  
0
-20  
-20  
-50  
-15  
-10  
-5  
0
5
10  
15  
20  
-25  
0
25  
50  
75  
100  
Offset Voltage (µV)  
Temperature (°C)  
Figure 6-3. Offset Voltage Distribution at -40°C  
Figure 6-4. Offset Voltage vs Temperature  
15  
12  
9
10  
5
0
6
-5  
TA = –40°C  
TA = 25°C  
TA = 85°C  
TA = 125°C  
3
0
-10  
-15  
-0.1 -0.08 -0.06 -0.04 -0.02  
0
0.02 0.04 0.06 0.08 0.1  
-10  
-5  
0
5
10  
Offset Voltage Drift (µV/°C)  
Output Voltage (V)  
Figure 6-5. Offset Voltage Drift Production Distribution  
Figure 6-6. Offset Voltage vs Output Voltage  
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6.7 Typical Characteristics (continued)  
at TA = 25°C, VS = ±15 V, VCM = VOUT = midsupply, and RL = 10 kΩ (unless otherwise noted)  
200  
190  
180  
170  
160  
150  
140  
0.0001  
0.001  
0.01  
10  
5
0
-5  
0.1  
-10  
-50  
-25  
0
25  
50  
75  
100  
125  
0
10  
20  
30  
40  
Temperature (°C)  
Supply Voltage (V)  
Figure 6-7. Offset Voltage vs Power Supply Voltage  
Figure 6-8. Power-Supply Rejection Ratio vs Temperature  
160  
150  
140  
130  
120  
0.01  
0.1  
1
160  
CMRR  
–PSRR  
+PSRR  
140  
120  
100  
80  
60  
40  
20  
0
1
10  
100  
1k  
10k  
100k  
1M  
10M  
-50  
-25  
0
25  
50  
75  
100  
125  
Frequency (Hz)  
Temperature (°C)  
Figure 6-9. Power-Supply and Common-Mode Rejection Ratio  
vs Frequency  
Figure 6-10. Common-Mode Rejection Ratio vs Temperature  
10  
15  
10  
5
5
0
0
-5  
-5  
-10  
-10  
-14.5  
-14  
-13.5  
-13  
-15  
-10  
-5  
0
5
10  
14  
Common-mode Voltage (V)  
Common-mode Voltage (V)  
Figure 6-11. Offset Voltage vs Common-Mode Voltage  
Figure 6-12. Offset Voltage vs Vcm at Low Supply  
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6.7 Typical Characteristics (continued)  
at TA = 25°C, VS = ±15 V, VCM = VOUT = midsupply, and RL = 10 kΩ (unless otherwise noted)  
15  
10  
5
160  
140  
120  
100  
80  
240  
Gain  
Phase 200  
160  
120  
80  
60  
40  
40  
0
0
20  
-40  
-80  
-120  
0
-5  
12.5  
-20  
100m  
13  
13.5  
14  
1
10  
100  
1k  
10k  
100k  
1M  
10M  
Common-mode Voltage (V)  
Frequency (Hz)  
Figure 6-13. Offset Voltage vs Vcm at High Supply  
Figure 6-14. Open-Loop Gain and Phase vs Frequency  
180  
0.001  
0.01  
0.1  
180  
170  
160  
150  
140  
130  
120  
0.001  
0.01  
0.1  
RL = 2 kohm  
RL = 10 kohm  
160  
140  
120  
100  
80  
1
10  
100  
1
125  
60  
0.09  
1000  
0.15  
-50  
-25  
0
25  
50  
75  
100  
0.1  
0.11  
0.12  
0.13  
0.14  
Temperature (°C)  
Distance from the Supply (V)  
Figure 6-16. Open-Loop Gain vs Temperature  
Figure 6-15. Open-Loop Gain vs Distance from Supply  
50  
40  
Gain = +1  
Gain = –1  
Gain = +10  
Gain = +100  
40  
30  
20  
10  
0
35  
30  
25  
20  
15  
10  
5
-10  
-20  
-30  
0
100  
1k  
10k  
100k  
1M  
10M  
-500 -400 -300 -200 -100  
0
100 200 300 400 500  
Frequency (Hz)  
Input Bias Current (pA)  
Figure 6-17. Closed-Loop Gain vs Frequency  
Figure 6-18. Input Bias Production Distribution  
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6.7 Typical Characteristics (continued)  
at TA = 25°C, VS = ±15 V, VCM = VOUT = midsupply, and RL = 10 kΩ (unless otherwise noted)  
2.5  
2
0.75  
0.6  
0.45  
0.3  
0.15  
0
TA = –40°C  
TA = 25°C  
TA = 85°C  
TA = 125°C  
IB–  
IB+  
IOS  
1.5  
1
0.5  
0
-0.5  
-1  
-1.5  
-2  
-2.5  
-15 -12  
-9  
-6  
-3  
0
3
6
9
12  
15  
-50  
-25  
0
25  
50  
75  
100  
125  
Common-Mode Voltage (V)  
Temperature (°C)  
Figure 6-19. Input Bias vs Common-Mode Voltage  
Figure 6-20. Input Bias and Input Offset Current vs Temperature  
7.5  
50  
5
2.5  
0
40  
30  
20  
10  
0
-2.5  
-5  
TA = –40°C  
TA = 25°C  
TA = 85°C  
TA = 125°C  
-7.5  
-60  
-40  
-20  
0
20  
40  
60  
-450  
-300  
-150  
0
150  
300  
450  
Common-mode Voltage (V)  
Input-referenced Offset Current (pA)  
Figure 6-21. Input Bias vs. Overvoltage Protected Common  
Mode Range  
Figure 6-22. Input Offset Current Production Distribution  
100  
10  
1
100m  
1
10  
100  
1k  
10k  
100k  
Frequency (Hz)  
Time (1 s/div)  
Figure 6-23. Voltage Noise Density vs Frequency  
Figure 6-24. 0.1-Hz To 10-Hz Noise  
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6.7 Typical Characteristics (continued)  
at TA = 25°C, VS = ±15 V, VCM = VOUT = midsupply, and RL = 10 kΩ (unless otherwise noted)  
-70  
-80  
-60  
-66  
G = –1, 10 kohm Load  
G = –1, 2 kohm Load  
G = +1, 10 kohm Load  
G = +1, 2 kohm Load  
G = +1, 2 kohm Load  
G = –1, 2 kohm Load  
G = +1, 10 kohm Load  
G = –1, 10 kohm Load  
-72  
-78  
-90  
-84  
-90  
-100  
-110  
-120  
-96  
-102  
-108  
-114  
-120  
100  
1k  
Frequency (Hz)  
10k  
10m  
100m  
1
10  
Amplitude (VRMS  
)
Figure 6-25. Total Harmonic Distortion + Noise Ratio vs  
Frequency  
Figure 6-26. Total Harmonic Distortion + Noise Ratio vs Output  
Amplitude  
1000  
100  
10  
40  
Vs = ±18 V  
Vs = ±2.25 V  
35  
30  
25  
20  
15  
10  
5
0
100m  
1
10  
100  
1k  
10k  
100k  
1
10  
100  
1k  
10k  
100k  
1M  
10M  
Frequency (Hz)  
Frequency (Hz)  
Figure 6-27. Current Noise vs Frequency  
Figure 6-28. Maximum Output Voltage vs Frequency  
15  
12.5  
10  
0
TA = –40°C  
TA = 25°C  
TA = 85°C  
-2.5  
-5  
TA = 125°C  
7.5  
5
-7.5  
-10  
TA = –40°C  
TA = 25°C  
TA = 85°C  
TA = 125°C  
2.5  
0
-12.5  
-15  
0
5
10  
15  
20  
25  
30  
0
5
10  
15  
20  
25  
30  
Output Current (mA)  
Output Current (mA)  
Figure 6-29. Output Voltage Swing vs Output Sourcing Current  
Figure 6-30. Output Voltage Swing vs Output Sinking Current  
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6.7 Typical Characteristics (continued)  
at TA = 25°C, VS = ±15 V, VCM = VOUT = midsupply, and RL = 10 kΩ (unless otherwise noted)  
1000  
Input (V)  
Output (V)  
100  
10  
1
10  
100  
1k  
10k  
100k  
1M  
10M  
Frequency (Hz)  
Time (100 µs/div)  
Figure 6-31. Open-Loop Output Impedance vs Frequency  
Figure 6-32. No Phase Reversal  
60  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
RISO = 0 ohm  
RISO = 25 ohm  
RISO = 50 ohm  
RISO = 0 ohm  
RISO = 25 ohm  
RISO = 50 ohm  
50  
40  
30  
20  
10  
0
30  
100  
Capactiance (pF)  
1000  
30  
100  
1000  
Capactiance (pF)  
Gain = 1  
Gain = -1  
Figure 6-33. Small-Signal Overshoot vs Capacitive Load  
Figure 6-34. Small-Signal Overshoot vs Capacitive Load  
80  
VOUT  
VIN  
70  
60  
50  
40  
30  
20  
10  
20  
100  
1000  
Time (500 ns/div)  
Capacitance (pF)  
Gain = –1  
Figure 6-36. Positive Overload Recovery  
Figure 6-35. Phase Margin vs Capacitive Load  
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6.7 Typical Characteristics (continued)  
at TA = 25°C, VS = ±15 V, VCM = VOUT = midsupply, and RL = 10 kΩ (unless otherwise noted)  
3
Falling (mV)  
Rising (mV)  
2
1
0
-1  
-2  
VOUT  
VIN  
-3  
2
3
4
5
6
Time (500 ns/div)  
Time (uS)  
Gain = –1  
Figure 6-37. Negative Overload Recovery  
Figure 6-38. Settling Time  
VOUT (V)  
VIN (V)  
VOUT (V)  
VIN (V)  
Time (1 µS/Div)  
Time (1 µS/Div)  
Gain = 1  
Gain = –1  
Figure 6-39. Small-Signal Step Response  
Figure 6-40. Small-Signal Step Response  
VIN (V)  
VOUT (V)  
VOUT (V)  
VIN (V)  
Time (2 µS/Div)  
Time (2 µS/Div)  
Gain = 1  
Gain = –1  
Figure 6-41. Large-Signal Step Response  
Figure 6-42. Large-Signal Step Response  
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6.7 Typical Characteristics (continued)  
at TA = 25°C, VS = ±15 V, VCM = VOUT = midsupply, and RL = 10 kΩ (unless otherwise noted)  
28  
25  
22  
19  
16  
13  
10  
140  
130  
120  
110  
100  
90  
80  
70  
60  
Positive Output Voltage  
Negative Output Voltage  
50  
40  
-50  
-25  
0
25  
50  
75  
100  
125  
10  
100  
Frequency (MHz)  
1000  
6000  
Temperature (°C)  
Figure 6-43. Short-Circuit Current vs Temperature  
Figure 6-44. Electromagnetic Interference Rejection (EMIRR)  
250  
360  
320  
280  
240  
200  
160  
120  
200  
150  
100  
50  
Vs = 4.5 V  
0
0
8
16  
24  
32  
40  
-50  
-25  
0
25  
50  
75  
100  
125  
Supply Voltage (V)  
Temperature (°C)  
Figure 6-45. Quiescent Current vs Supply Voltage  
Figure 6-46. Quiescent Current vs Temperature  
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7 Parameter Measurement Information  
7.1 Typical Specifications and Distributions  
Designers often have questions about a typical specification of an amplifier in order to design a more robust  
circuit. As a result of natural variations in process technology and manufacturing procedures, every specification  
of an amplifier exhibits some amount of deviation from the ideal value, such as the input bias current of an  
amplifier. These deviations often follow Gaussian (bell curve), or normal distributions. Circuit designers can  
leverage this information to guardband their system, even when there is no minimum or maximum specification  
in the Electrical Characteristics.  
0.00312% 0.13185%  
0.13185% 0.00312%  
0.00002%  
0.00002%  
2.145% 13.59% 34.13% 34.13% 13.59% 2.145%  
1
1 1 1 1 1 1 1 1  
1
1
1
-61 -51 -41 -31 -21 -1  
+1 +21 +31 +41 +51 +61  
Figure 7-1. Ideal Gaussian Distribution  
Figure 7-1 shows an example distribution, where µ, is the mean of the distribution, and where σ, or sigma, is the  
standard deviation of a system. For a specification that exhibits this kind of distribution, approximately two-thirds  
(68.26%) of all units can be expected to have a value within one standard deviation, or one sigma, of the mean  
(from µ–σ to µ+σ).  
Depending on the specification, values listed in the typical column of Electrical Characteristics are represented  
in different ways. As a general guideline, if a specification naturally has a nonzero mean (for example, gain  
bandwidth), then the typical value is equal to the mean (µ). However, if a specification naturally has a mean near  
zero (for example, input bias current), then the typical value is equal to the mean plus one standard deviation (µ  
+ σ) to most accurately represent the typical value.  
Use this chart to calculate the approximate probability of a specification in a unit. For example, the OPA2206  
typical input bias current is ±0.1 nA; therefore, 68.2% of all devices are expected to have an input bias from ±0.1  
nA. At 4σ, 99.9937% of the distribution has an input bias less than ±0.28 nA, which means that 0.0063% of the  
population is outside of these limits, and corresponds to approximately 1 in 15,873 units.  
Units that are found to exceed any tested minimum or maximum specifications are removed from production  
material. For example, the OPA2206 has a maximum input bias of ±0.4 nA at 25°C, and although this value  
corresponds to approximately 6σ (~1 in 500 million units), TI removes any unit with a larger input bias from  
production material.  
For specifications with no value in the minimum or maximum column, consider selecting a sigma value of  
sufficient guardband for your application, and design worst-case conditions using this value. This information  
should only be used to estimate the performance of a device.  
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8 Detailed Description  
8.1 Overview  
The OPA2206 is the first 36-V, bipolar, e-trim operational amplifier. This device uses a package-level offset trim  
to minimize the offset voltage and offset voltage drift introduced during the manufacturing process. This trim is  
performed after the device is assembled to remove any offset errors introduced throughout the manufacturing  
process, and trim communication is disabled afterward. The device features super beta inputs that decrease the  
input bias current and input current noise. The device also features input overvoltage protection that protects the  
device for input voltages up to ±40 V beyond either supply rail.  
8.2 Functional Block Diagram  
V+  
e-trimTM  
Pre-Driver  
OUT  
Super Beta  
Input Devices  
+IN  
IN  
Overvoltage  
Protection  
Overload  
Power  
Limiter  
V
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8.3 Feature Description  
8.3.1 Input Overvoltage Protection  
The inputs of the OPA2206 are individually protected for voltages up to ±40 V beyond either supply. For  
example, a common-mode voltage anywhere between –55 V and +55 V does not cause damage when powered  
from ±15-V supplies. Internal circuitry on each input provides low series impedance under normal signal  
conditions thus maintaining high performance under normal operating conditions. If the input is overloaded,  
the protection circuitry limits the input current to a value of approximately 4.8 mA.  
During an input overvoltage condition, current flows through the input protection diodes into the power supplies,  
as shown in Figure 8-1. If the power supplies are unable to sink current, then Zener diode clamps (ZD1 and  
ZD2) must be placed on the power supplies to provide a current pathway to ground. During an overvoltage  
condition, the input bias current of the inputs increase as shown in Figure 8-2.  
+V  
ZD1  
+VS  
IN  
Overvoltage  
Protection  
Input Voltage  
Source  
+
Input Transistor  
œ
-VS  
ZD2  
-V  
Figure 8-1. OPA2206 Input Overvoltage Current Path  
Figure 8-2 shows the input current for input voltages from –55 V to +55 V when the OPA2206 is powered by  
±15-V supplies.  
7.5  
5
2.5  
0
-2.5  
TA = –40°C  
TA = 25°C  
TA = 85°C  
TA = 125°C  
-5  
-7.5  
-60  
-40  
-20  
0
20  
40  
60  
Common-mode Voltage (V)  
Figure 8-2. OPA2206 Input Current vs Input Voltage (VS = ±15 V)  
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8.3.2 Input Offset Trimming  
The OPA2206 is the industry's first e-trim operational amplifier built on a bipolar process. The input offset  
voltage of an amplifier is determined by the inherent mismatch between the input transistors. The offset can  
be minimized using laser-trimming performed during the manufacturing process while the device is still in the  
bare silicon form. However, when the silicon is packaged, the packaging process introduces additional offset due  
to mechanic stresses. TI's new trimming processes are used to trim the offset after the packaging process is  
complete to minimize both inherent and package-induced offsets. After trimming, communication is disabled to  
make sure the amplifier operates properly in the final system.  
A comparison between production offset values for a the industry popular, laser-trimmed OPA2277 amplifier and  
the OPA2206 proprietary trim can be seen in Figure 8-3 and Figure 8-4.  
20  
18  
16  
14  
12  
10  
8
16  
14  
12  
10  
8
Typical distribution  
of packaged units.  
Single, dual, and  
quad included.  
6
6
4
4
2
2
0
0
504540353025201510–5  
0 5 10 15 20 25 30 35 40 45 50  
-50 -40 -30 -20 -10  
0
10  
20  
30  
40  
50  
Offset Voltage (µV)  
Input-referenced Offset Voltage (µV)  
Figure 8-3. OPA2277 Laser-Trimmed Operational  
Amplifier Offset  
Figure 8-4. OPA2206 e-trim™ Operational Amplifier  
Offset  
The OPA2206 is also trimmed at two temperatures to minimize the input offset voltage drift over temperature.  
The final performance of the offset drift can be seen in Figure 8-5.  
15  
12  
9
6
3
0
-0.1 -0.08 -0.06 -0.04 -0.02  
0
0.02 0.04 0.06 0.08 0.1  
Offset Voltage Drift (µV/°C)  
Figure 8-5. OPA2206 e-trim™ Operational Amplifier Drift  
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8.3.3 Lower Input Bias With Super-Beta Inputs  
The OPA2206 has a super-beta input transistor architecture. In a transistor, the beta value is the ratio between  
the current flowing into the base and the current flowing from the collector to the emitter. A super-beta transistor  
is one where the beta value has been increased from several hundred to thousands. In a bipolar amplifier, the  
input bias current is the current flowing into the base of the input transistor pair, as well as a small leakage  
current that flows through the ESD diodes. A super-beta input reduces the input bias current of the amplifier. In  
addition, the super-beta inputs lower the input current noise that is directly related to the input bias current of the  
device. A comparison between the input bias current of the OPA2277 and the OPA2206 super-beta input bias  
currents can be seen in Figure 8-6 and Figure 8-7.  
5
4
6
5
IBN  
IBP  
4
3
3
2
2
1
1
0
0
–1  
–2  
–3  
–4  
–5  
-1  
-2  
-3  
-4  
-5  
Curves represent typical  
production units.  
–75  
–50  
–25  
0
25  
50  
75  
100  
125  
-50  
-25  
0
25  
50  
75  
100  
125  
Temperature (°C)  
Temperature (°C)  
Figure 8-6. OPA2277 Input Bias Current  
8.3.4 Overload Power Limiter  
Figure 8-7. OPA2206 Super-Beta Input Bias Current  
In many bipolar-based amplifiers, the output stage of the amplifier can draw significant (several milliamperes)  
of quiescent current if the output voltage becomes clipped (meaning the output voltage becomes limited by the  
negative or positive supply voltage). This condition can cause the system to enter a high-power consumption  
state, and potentially cause oscillations between the power supply and signal chain. The OPA2206 has an  
advanced output stage design that eliminates this problem. When the output voltage reaches the either supply  
(V+ or V–), there is virtually no additional current consumption from the nominal quiescent current. This feature  
helps eliminate any potential system problems when the signal chain is disrupted by a large external transient  
voltage.  
8.3.5 EMI Rejection  
The OPA2206 uses integrated electromagnetic interference (EMI) filtering to reduce the effects of EMI from  
sources, such as wireless communications and densely-populated boards with a mix of analog signal chain and  
digital components. EMI immunity can be improved through circuit design techniques that improve the system  
performance. Additional information can be found in the EMI Rejection Ratio of Operation Amplifiers application  
report.  
8.4 Device Functional Modes  
The OPA2206 has two functional modes. The device enters normal operation with any supply between 4.5 V  
(±2.25 V) and 36 V (±18 V), and an input voltage that meets the input common-mode voltage range shown in  
Section 6.  
If the input voltage exceeds the device specifications, the device will enter an overvoltage protection mode. In  
this mode the input overvoltage protection sub-circuit will limit the voltage and current seen by the amplifier  
core by adding additional impedance between the input pins and the amplifier core. Additional current that  
is generated from the voltage drop across this input impedance is routed through the ESD structure of the  
OPA2206, as shown in Figure 8-1.  
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9 Application and Implementation  
Note  
Information in the following applications sections is not part of the TI component specification,  
and TI does not warrant its accuracy or completeness. TI’s customers are responsible for  
determining suitability of components for their purposes, as well as validating and testing their design  
implementation to confirm system functionality.  
9.1 Application Information  
The OPA2206 is a unity-gain stable operational amplifier with very low offset voltage, offset voltage drift, voltage  
noise, current noise, and power consumption. The built-in overvoltage protection allows the device to protect  
against signals outside of the expected range, a reverse connection, or in cases where the inputs are shorted  
to a system supply. These features make this device a great choice for a variety of space-constrained and  
power-constrained systems by removing the need for discrete protection such as clamping diodes.  
9.2 Typical Applications  
9.2.1 Voltage Attenuator  
80 k  
20 k  
12 V  
±10 V  
12 V  
2.2 nF  
100 nF  
GND  
100 nF  
GND  
+
3.74 k  
11.8 k  
2.2 nF  
6.65 k  
Output  
OPA2206  
+
2 V  
OPA2206  
330 pF  
GND  
100 nF  
GND  
100 nF  
GND  
12 V  
12 V  
GND  
Figure 9-1. OPA2206 Configured as a Voltage Attenuator  
9.2.1.1 Design Requirements  
The design requirements for this system are:  
Input signal range: ±10 V  
Input signal frequency: up to 10 kHz  
3rd-order Butterworth filter -3-dB frequency: 20 kHz  
Output voltage: 0 V to 5 V  
Input protection: up to ±52 V  
9.2.1.2 Detailed Design Procedure  
In this design, a ±10-V, 10-kHz bandwidth, bipolar signal is attenuated and converted to a single-ended signal  
and filtered by a 3rd-order Butterworth filter to drive a single-ended analog-to-digital converter (ADC). By using  
the OPA2206, the input of the signal chain is protected from overvoltages up to 40 V beyond either supply. This  
signal-chain design is common for programmable logic controllers (PLCs), low-power data acquisition systems  
(DAQs) and field instruments where high precision, low power and signal fault protection are needed.  
The OPA2206 was selected for this application because of the high supply range, high dc precision (2-µV offset  
and 0.04-µV/°C offset drift), and low power consumption (220-µA quiescent current) that minimizes thermal  
dissipation requirements. Because of the internal OVP topology, the device provides better dc and ac accuracy  
under normal operating conditions compared to passive external protection and results in a smaller system  
solution. Be sure to connect a zener diode between each supply to ground to provide a return path for the  
current that is generated during a fault condition.  
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The first stage of the signal chain is an attenuator and level-shifter. The input signal to this stage is bipolar ±10 V  
that is attenuated to ±2.5 V, and then level-shifted so that the output is a single-ended, 0-V to 5-V signal. The  
feedback and gain resistors were selected as 20 kΩ and 80 kΩ, respectively. Thus, the combined impedance  
is 100 kΩ, which lowers the input current to the signal chain, and minimizes errors resulting from higher output  
impedance sensors.  
The second stage of the signal chain uses the second channel of the OPA2206 to create a 3rd-order Butterworth  
filter with a –3-dB response of 20 kHz. For more information on filter design, refere to Texas Instrument's filter  
design tool.  
The output of this signal chain is shown in Figure 9-2 and the filter response is shown in Figure 9-3.  
9.2.1.3 Application Curves  
10  
8
0
-20  
Input  
Output  
6
4
-40  
2
0
-60  
-2  
-4  
-6  
-8  
-10  
-80  
-100  
0.01  
0.1  
1
10  
100  
1000  
0.2  
0.24  
0.28  
0.32  
0.36  
0.4  
Frequency (kHz)  
Time (ms)  
Figure 9-3. Attenuator + Filter Response  
Figure 9-2. Input and Output Signal  
9.2.2 Discrete, Two-Op-Amp Instrumentation Amplifier  
Figure 9-4 shows the OPA2206 configured as a two op amp, discrete instrumentation amplifier. This  
configuration allows for a differential signal measurement, such as the signal from a load cell, with higher input  
impedance to the signal chain than most monolithic instrumentation amplifiers. Additionally, the input overvoltage  
protection of the OPA2206 protects the signal chain from being damaged by fault conditions where the input  
signal exceeds the supply voltage of the amplifier.  
V+  
V1  
+
V
OUT = (V1 – V2)(1 + R2/R1)  
OPA2206  
R2  
V
V+  
R1  
V2  
+
OPA2206  
V
R2  
R1  
GND  
Figure 9-4. OPA2206 Configured as a Two Op Amp, Discrete Instrumentation Amplifier  
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9.2.3 Input Buffer and Protection for ADC Driver  
Section 9.2.1.1 shows the OPA2206 configured as an input buffer for an ADC driver using the THP210. The  
high dc precision and low noise of the OPA2206 make this device an excellent choice for precision signal  
chain conditioning. The low input bias of the amplifier minimizes dc errors created for higher output impedance  
sensors. The integrated input overvoltage protection prevents damage to the signal chain due to an input fault  
condition where the signal exceeds the supply range of the OPA2206, or if the inputs are shorted to a higher  
supply rail. For more information on designing a precision ADC driver,see .  
909  
V+  
470 pF  
V+  
2.1 k  
2.74 k  
100  
+
OPA2206  
1 nF  
V
THP210  
+
+
Input  
Signal  
VCM  
ADS8912B  
1.1 nF  
2.1 k  
V+  
1 nF  
GND  
V
+
2.74 k  
100  
OPA2206  
470 pF  
V
909  
Figure 9-5. OPA2206 Configured as Input-Signal-Chain Buffer  
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10 Power Supply Recommendations  
The OPA2206 operates with a supply between 4.5 V (±2.25 V) and 36 V (±18 V). Parameters that can exhibit  
significant variance with regard to operating voltages are presented in Section 6.7.  
11 Layout  
11.1 Layout Guidelines  
For best operational performance of the device, use good printed circuit board (PCB) layout practices, including:  
Connect low-ESR, 0.1-µF ceramic bypass capacitors between each supply pin and ground, placed as close  
to the device as possible. A single bypass capacitor from V+ to ground is applicable for single-supply  
applications. Noise can propagate into analog circuitry through the power pins of the circuit as a whole, as  
well as through the individual op amp. Bypass capacitors are used to reduce the coupled noise by providing  
low-impedance power sources local to the analog circuitry.  
Make sure to physically separate digital and analog grounds and pay attention to the flow of the ground  
current. Separate grounding for analog and digital portions of circuitry is one of the simplest and most  
effective methods of noise suppression. One or more layers on multilayer PCBs are usually devoted to  
ground planes. A ground plane helps distribute heat and reduces EMI noise pickup.  
In order to reduce parasitic coupling, run the input traces as far away from the supply or output traces as  
possible. If these traces cannot be kept separate, crossing the sensitive trace perpendicular is much better,  
as opposed to in parallel with the noisy trace.  
Place the external components as close to the device as possible. As shown in Figure 11-1, keep RF and RG  
close to the inverting input to minimize parasitic capacitance.  
Keep the length of input traces as short as possible. Always remember that the input traces are the most  
sensitive part of the circuit.  
Consider a driven, low-impedance guard ring around the critical traces. A guard ring can significantly reduce  
leakage currents from nearby traces that are at different potentials.  
Clean the PCB following board assembly for best performance.  
Any precision integrated circuit may experience performance shifts due to moisture ingress into the plastic  
package. After any aqueous PCB cleaning process, bake the PCB assembly to remove moisture introduced  
into the device packaging during the cleaning process. A low-temperature, post-cleaning bake at 85°C for 30  
minutes is sufficient for most circumstances.  
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11.2 Layout Example  
VIN  
+
VOUT  
RG  
RF  
Figure 11-1. Schematic Representation  
Place components close  
to device and to each  
other to reduce parasitic  
errors  
Run the input traces  
as far away from  
the supply lines  
as possible  
VS+  
RF  
NC  
NC  
Use a low-ESR,  
ceramic bypass  
capacitor  
RG  
GND  
œIN  
+IN  
Vœ  
V+  
OUTPUT  
NC  
VIN  
GND  
GND  
VSœ  
VOUT  
Ground (GND) plane on another layer  
Use low-ESR,  
ceramic bypass  
capacitor  
Figure 11-2. Operational Amplifier Board Layout for Noninverting Configuration  
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12 Device and Documentation Support  
12.1 Device Support  
12.1.1 Development Support  
The following evaluation modules are available:  
DIP-ADAPTER-EVM  
DIYAMP-EVM  
12.2 Receiving Notification of Documentation Updates  
To receive notification of documentation updates, navigate to the device product folder on ti.com. Click on  
Subscribe to updates to register and receive a weekly digest of any product information that has changed. For  
change details, review the revision history included in any revised document.  
12.3 Support Resources  
TI E2Esupport forums are an engineer's go-to source for fast, verified answers and design help — straight  
from the experts. Search existing answers or ask your own question to get the quick design help you need.  
Linked content is provided "AS IS" by the respective contributors. They do not constitute TI specifications and do  
not necessarily reflect TI's views; see TI's Terms of Use.  
12.4 Trademarks  
e-trimand TI E2Eare trademarks of Texas Instruments.  
All trademarks are the property of their respective owners.  
12.5 Electrostatic Discharge Caution  
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled  
with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.  
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may  
be more susceptible to damage because very small parametric changes could cause the device not to meet its published  
specifications.  
12.6 Glossary  
TI Glossary  
This glossary lists and explains terms, acronyms, and definitions.  
13 Mechanical, Packaging, and Orderable Information  
The following pages include mechanical, packaging, and orderable information. This information is the most  
current data available for the designated devices. This data is subject to change without notice and revision of  
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.  
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PACKAGE OPTION ADDENDUM  
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13-Apr-2021  
PACKAGING INFORMATION  
Orderable Device  
Status Package Type Package Pins Package  
Eco Plan  
Lead finish/  
Ball material  
MSL Peak Temp  
Op Temp (°C)  
Device Marking  
Samples  
Drawing  
Qty  
(1)  
(2)  
(3)  
(4/5)  
(6)  
OPA2206ADGKR  
OPA2206ADGKT  
OPA2206DGKR  
ACTIVE  
ACTIVE  
VSSOP  
VSSOP  
VSSOP  
DGK  
DGK  
DGK  
8
8
8
2500 RoHS & Green  
NIPDAU  
Level-2-260C-1 YEAR  
Level-2-260C-1 YEAR  
Call TI  
-40 to 125  
-40 to 125  
-40 to 125  
22A6  
22A6  
250  
RoHS & Green  
NIPDAU  
Call TI  
PREVIEW  
2500  
Non-RoHS &  
Non-Green  
XOPA2206DGKR  
ACTIVE  
VSSOP  
DGK  
8
2500  
Non-RoHS &  
Non-Green  
Call TI  
Call TI  
-40 to 125  
(1) The marketing status values are defined as follows:  
ACTIVE: Product device recommended for new designs.  
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.  
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.  
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.  
OBSOLETE: TI has discontinued the production of the device.  
(2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance  
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may  
reference these types of products as "Pb-Free".  
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.  
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based  
flame retardants must also meet the <=1000ppm threshold requirement.  
(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.  
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.  
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation  
of the previous line and the two combined represent the entire Device Marking for that device.  
(6)  
Lead finish/Ball material - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead finish/Ball material values may wrap to two  
lines if the finish value exceeds the maximum column width.  
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information  
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and  
Addendum-Page 1  
PACKAGE OPTION ADDENDUM  
www.ti.com  
13-Apr-2021  
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.  
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.  
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.  
Addendum-Page 2  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
14-Apr-2021  
TAPE AND REEL INFORMATION  
*All dimensions are nominal  
Device  
Package Package Pins  
Type Drawing  
SPQ  
Reel  
Reel  
A0  
B0  
K0  
P1  
W
Pin1  
Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant  
(mm) W1 (mm)  
OPA2206ADGKR  
OPA2206ADGKT  
VSSOP  
VSSOP  
DGK  
DGK  
8
8
2500  
250  
330.0  
180.0  
12.4  
12.4  
5.3  
5.3  
3.4  
3.4  
1.4  
1.4  
8.0  
8.0  
12.0  
12.0  
Q1  
Q1  
Pack Materials-Page 1  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
14-Apr-2021  
*All dimensions are nominal  
Device  
Package Type Package Drawing Pins  
SPQ  
Length (mm) Width (mm) Height (mm)  
OPA2206ADGKR  
OPA2206ADGKT  
VSSOP  
VSSOP  
DGK  
DGK  
8
8
2500  
250  
853.0  
210.0  
449.0  
185.0  
35.0  
35.0  
Pack Materials-Page 2  
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