OPA349SA3KG4 [TI]

1A, Rail-to-Rail I/O CMOS OPERATIONAL AMPLIFIERS;
OPA349SA3KG4
型号: OPA349SA3KG4
厂家: TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
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1A, Rail-to-Rail I/O CMOS OPERATIONAL AMPLIFIERS

放大器
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OPA349  
OPA2349  
OPA349  
O
P
A
2
34  
9
SBOS121B – JUNE 2000 – REVISED JANUARY 2004  
1µA, Rail-to-Rail I/O CMOS  
OPERATIONAL AMPLIFIERS  
DESCRIPTION  
FEATURES  
The OPA349 and OPA2349 are ultra-low power operational  
amplifiers that provide 70kHz bandwidth with only 1µA quies-  
cent current. These rail-to-rail input and output amplifiers are  
specifically designed for battery-powered applications. The  
input common-mode voltage range extends 200mV beyond  
the power-supply rails and the output swings to within 350mV  
of the rails, maintaining wide dynamic range. Unlike some  
micropower op amps, these parts are unity-gain stable and  
require no external compensation to achieve wide band-  
width. The OPA349 features a low input bias current that  
allows the use of large source and feedback resistors.  
LOW SUPPLY CURRENT: 1µA  
GAIN-BANDWIDTH: 70kHz  
UNITY-GAIN STABLE  
LOW INPUT BIAS CURRENT: 10pA (max)  
WIDE SUPPLY RANGE: 1.8V to 5.5V  
INPUT RANGE: 200mV Beyond Rails  
OUTPUT SWINGS TO 350mV OF RAILS  
OUTPUT DRIVE CURRENT: 8mA  
OPEN-LOOP GAIN: 90dB  
MicroPACKAGES: SC70, SOT23-5, SOT23-8  
The OPA349 can be operated with power supplies from 1.8V  
to 5.5V with little change in performance, ensuring continuing  
superior performance even in low battery situations.  
APPLICATIONS  
BATTERY PACKS AND POWER SUPPLIES  
PORTABLE PHONES, PAGERS, AND CAMERAS  
SOLAR-POWERED SYSTEMS  
SMOKE, GAS, AND FIRE DETECTION SYSTEMS  
REMOTE SENSORS  
PCMCIA CARDS  
DRIVING ANALOG-TO-DIGITAL (A/D) CONVERTERS  
MicroPOWER FILTERS  
The OPA349 comes in miniature SOT23-5, SC70, and SO-8  
surface-mount packages. The OPA2349 dual is available in  
SOT23-8, and SO-8 surface-mount packages. These tiny  
packages are ideal for use in high-density applications, such  
as PCMCIA cards, battery packs, and portable instruments.  
The OPA349 is specified for 0°C to +70°C. The OPA2349 is  
specified for –40°C to +70°C.  
OPEN-LOOP GAIN AND PHASE vs FREQUENCY  
100  
OPAx349 RELATED PRODUCTS  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
0
FEATURES  
PRODUCT  
Gain  
1µA, 5.5kHz, Rail-To-Rail  
1µA, 5.5kHz, Rail-To-Rail  
TLV240x  
TLV224x  
TLV238x  
TLV27Lx  
TLV276x  
OPAx347  
OPAx348  
45  
90  
135  
180  
Phase  
7µA, 160kHz, Rail-To-Rail, 2.7V to 16V Supply  
7µA, 160kHz, Rail-To-Rail, Micro Power  
20µA, 500kHz, Rail-To-Rail, 1.8V Micro Power  
20µA, 350kHz, Rail-To-Rail, Micro Power  
45µA, 1MHz, Rail-To-Rail, 2.1V to 5.5V Supply  
0.1  
1
10  
100  
1k  
10k  
100k  
1M  
Frequency (Hz)  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
All trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily include  
testing of all parameters.  
Copyright © 2000-2004, Texas Instruments Incorporated  
www.ti.com  
ABSOLUTE MAXIMUM RATINGS(1)  
ELECTROSTATIC  
DISCHARGE SENSITIVITY  
Supply Voltage, V+ to V................................................................... 5.5V  
Signal Input Terminals, Voltage(2) .................. (V) 0.5V to (V+) + 0.5V  
Current(2) .................................................... 10mA  
This integrated circuit can be damaged by ESD. Texas Instru-  
ments recommends that all integrated circuits be handled with  
appropriate precautions. Failure to observe proper handling  
and installation procedures can cause damage.  
Output Short Circuit(3) .............................................................. Continuous  
Operating Temperature, OPA2349 ................................55°C to +125°C  
Operating Temperature, OPA349 ........................................0°C to +85°C  
Storage Temperature .....................................................65°C to +150°C  
Junction Temperature ...................................................................... 150°C  
Lead Temperature (soldering, 3s) ................................................... 300°C  
ESD damage can range from subtle performance degrada-  
tion 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.  
NOTES: (1) Stresses above these ratings may cause permanent damage.  
Exposure to absolute maximum conditions for extended periods may de-  
grade device reliability. These are stress ratings only, and functional opera-  
tion of the device at these, or any other conditions beyond those specified,  
is not implied. (2) Input terminals are diode-clamped to the power-supply  
rails. Input signals that can swing more than 0.5V beyond the supply rails  
should be current-limited to 10mA or less. (3) Short-circuit to ground, one  
amplifier per package.  
PACKAGE/ORDERING INFORMATION(1)  
PACKAGE  
DESIGNATOR(1)  
PACKAGE  
MARKING  
ORDERING  
NUMBER  
TRANSPORT  
MEDIA, QUANTITY  
PRODUCT  
PACKAGE  
Single  
OPA349NA  
SOT23-5  
DBV  
"
D
A49  
"
OPA349UA  
OPA349NA/250  
OPA349NA/3K  
OPA349UA  
Tape and Reel, 250  
Tape and Reel, 3000  
Rails, 100  
"
"
OPA349UA  
SO-8  
"
"
SC70-5  
"
"
"
S49  
"
OPA349UA/2K5  
OPA349SA/250  
OPA349SA/3K  
Tape and Reel, 2500  
Tape and Reel, 250  
Tape and Reel, 3000  
OPA349SA  
DCK  
"
"
Dual  
OPA2349EA  
SOT23-8  
DCN  
C49  
"
OPA2349UA  
OPA2349EA/250  
OPA2349EA/3K  
OPA2349UA  
Tape and Reel, 250  
Tape and Reel, 3000  
Rails, 100  
"
"
SO-8  
"
"
D
"
OPA2349UA  
"
"
OPA2349UA/2K5  
Tape and Reel, 2500  
NOTE: (1) For the most current package and ordering information, see the Package Option Addendum located at the end of this data sheet.  
PIN CONFIGURATIONS  
OPA349  
Out  
V–  
1
2
3
5
4
V+  
OPA2349  
OPA349  
NC(1)  
V+  
Out A  
In A  
+In A  
V–  
1
2
3
4
8
7
6
5
NC(1)  
In  
1
2
3
4
8
7
6
5
V+  
+In  
In  
Out B  
In B  
+In B  
Out  
+In  
SOT23-5  
NC(1)  
V–  
OPA349  
+In  
1
2
3
5
4
V+  
SOT23-8, SO-8  
SO-8  
V–  
NOTE: (1) NC indicates no internal connection.  
In  
Out  
SC70-5  
OPA349, 2349  
2
SBOS121B  
www.ti.com  
ELECTRICAL CHARACTERISTICS (Single): VS = +1.8V to +5.5V  
Boldface limits apply over the specified temperature range, TA = 0°C to +70°C.  
At TA = +25°C, and RL = 1Mconnected to VS/2, unless otherwise noted.  
OPA349  
PARAMETER  
CONDITION  
MIN  
TYP(1)  
MAX  
UNITS  
OFFSET VOLTAGE  
Input Offset Voltage  
Over Temperature  
Drift  
vs Power-Supply Rejection Ratio  
Over Temperature  
VOS  
VS = 5V, VCM = 2.5V  
±2  
±2  
±15  
350  
±10  
±13  
mV  
mV  
µV/°C  
µV/V  
µV/V  
dVOS /dT  
PSRR  
VS = 1.8V to 5.5V, VCM = (V) + 0.3V  
1000  
3000  
INPUT VOLTAGE RANGE  
Common-Mode Voltage Range  
Common-Mode Rejection Ratio  
Over Temperature  
VCM  
CMRR  
(V) 0.2  
(V+) + 0.2  
V
V
V
S = +5V, 0.2V < VCM < 5.2V  
S = +5V, 0.2V < VCM < 3.5V  
48  
46  
52  
50  
60  
72  
dB  
dB  
dB  
dB  
Over Temperature  
INPUT BIAS CURRENT  
Input Bias Current  
Input Offset Current  
IB  
IOS  
±0.5  
±1  
±10  
±10  
pA  
pA  
INPUT IMPEDANCE  
Differential  
Common-Mode  
1013 || 2  
1013 || 4  
|| pF  
|| pF  
NOISE  
Input Voltage Noise, f = 0.1Hz to 10Hz  
Input Voltage Noise Density, f = 1kHz  
Current Noise Density, f = 1kHz  
8
300  
4
µVp-p  
nV/Hz  
fA/Hz  
en  
in  
OPEN-LOOP GAIN  
Open-Loop Voltage Gain  
Over Temperature  
Open-Loop Voltage Gain  
Over Temperature  
AOL  
RL = 1M, VS = +5.5V, +0.3V < VO < +5.2V  
74  
72  
74  
60  
90  
90  
dB  
dB  
dB  
dB  
AOL RL = 10k, VS = +5.5V, +0.35V < VO < +5.15V  
OUTPUT  
Voltage Output Swing from Rail  
Over Temperature  
RL = 1M, VS = +5.5V, AOL > 74dB  
RL = 10k, VS = +5.5V, AOL > 74dB  
300  
300  
350  
350  
mV  
mV  
mV  
mV  
mA  
mA  
Over Temperature  
Output Current  
Short-Circuit Current  
Capacitive Load Drive  
±8  
±10  
ISC  
CLOAD  
See Typical Characteristics  
FREQUENCY RESPONSE  
Gain-Bandwidth Product  
Slew Rate  
Settling Time, 0.1%  
0.01%  
CL = 10pF  
G = +1  
VS = +5V, G = +1  
VS = 5V, 1V Step  
VS = 5V, 1V Step  
VIN Gain = VS  
GBW  
SR  
tS  
70  
0.02  
65  
80  
5
kHz  
V/µs  
µs  
µs  
µs  
Overload Recovery Time  
POWER SUPPLY  
Specified Voltage Range  
Quiescent Current (per amplifier)  
Over Temperature  
VS  
IQ  
+1.8  
+5.5  
2
10  
V
µA  
µA  
IO = 0  
1
TEMPERATURE RANGE  
Specified Range  
Operating Range  
0
0
65  
+70  
+85  
+150  
°C  
°C  
°C  
Storage Range  
Thermal Resistance  
SOT23-5 Surface-Mount  
SO-8 Surface-Mount  
SC70-5 Surface-Mount  
θJA  
200  
150  
250  
°C/W  
°C/W  
°C/W  
NOTE: (1) Refer to Typical Characteristic curves.  
OPA349, 2349  
3
SBOS121B  
www.ti.com  
ELECTRICAL CHARACTERISTICS (Dual): VS = +1.8V to +5.5V  
Boldface limits apply over the specified temperature range, TA = 40°C to +70°C.  
At TA = +25°C, and RL = 1Mconnected to VS/2, unless otherwise noted.  
OPA2349  
PARAMETER  
CONDITION  
MIN  
TYP(1)  
MAX  
UNITS  
OFFSET VOLTAGE  
Input Offset Voltage  
Over Temperature  
Drift  
vs Power Supply  
Over Temperature  
Channel Separation, dc  
VOS  
VS = 5V, VCM = 2.5V  
±2  
±2  
±15  
350  
±10  
±13  
mV  
mV  
dVOS /dT  
PSRR  
µV/°C  
µV/V  
µV/V  
µV/V  
dB  
VS = 1.8V to 5.5V, VCM = (V) + 0.3V  
1000  
3000  
RL = 100kΩ  
f = 1kHz  
10  
66(1)  
INPUT VOLTAGE RANGE  
Common-Mode Voltage Range  
Common-Mode Rejection Ratio  
Over Temperature  
VCM  
CMRR  
(V) 0.2  
(V+) + 0.2  
V
V
V
S = +5V, 0.2V < VCM < 5.2V  
S = +5V, 0.2V < VCM < 3.5V  
48  
46  
52  
50  
60  
72  
dB  
dB  
dB  
dB  
Over Temperature  
INPUT BIAS CURRENT  
Input Bias Current  
Input Offset Current  
IB  
IOS  
±0.5  
±1  
±10  
±10  
pA  
pA  
INPUT IMPEDANCE  
Differential  
Common-Mode  
1013 || 2  
1013 || 4  
|| pF  
|| pF  
NOISE  
Input Voltage Noise, f = 0.1Hz to 10Hz  
Input Voltage Noise Density, f = 1kHz  
Current Noise Density, f = 1kHz  
8
300  
4
µVp-p  
nV/Hz  
fA/Hz  
en  
in  
OPEN-LOOP GAIN  
Open-Loop Voltage Gain  
Over Temperature  
Open-Loop Voltage Gain  
Over Temperature  
AOL  
RL = 1M, VS = +5.5V, +0.3V < VO < +5.2V  
74  
72  
74  
60  
90  
90  
dB  
dB  
dB  
dB  
AOL RL = 10k, VS = +5.5V, +0.35V < VO < +5.15V  
OUTPUT  
Voltage Output Swing from Rail  
Over Temperature  
RL = 1M, VS = +5.5V, AOL > 74dB  
RL = 10k, VS = +5.5V, AOL > 74dB  
150  
200  
300  
300  
350  
350  
mV  
mV  
mV  
mV  
mA  
mA  
Over Temperature  
Output Current  
Short-Circuit Current  
±8  
±10  
ISC  
FREQUENCY RESPONSE  
Gain-Bandwidth Product  
Slew Rate  
Settling Time, 0.1%  
0.01%  
CL = 10pF  
G = +1  
VS = +5V, G = +1  
VS = 5V, 1V Step  
VS = 5V, 1V Step  
VIN Gain = VS  
GBW  
SR  
tS  
70  
0.02  
65  
80  
5
kHz  
V/µs  
µs  
µs  
µs  
Overload Recovery Time  
POWER SUPPLY  
Specified Voltage Range  
Quiescent Current (per amplifier)  
Over Temperature  
VS  
IQ  
+1.8  
+5.5  
2
10  
V
µA  
µA  
IO = 0  
1
TEMPERATURE RANGE  
Specified Range  
Operating Range  
40  
40  
65  
+70  
+85  
+150  
°C  
°C  
°C  
Storage Range  
Thermal Resistance  
SOT23-8 Surface-Mount  
SO-8 Surface-Mount  
θJA  
200  
150  
°C/W  
°C/W  
NOTE: (1) Refer to Typical Characteristic curves.  
OPA349, 2349  
4
SBOS121B  
www.ti.com  
TYPICAL CHARACTERISTICS  
At TA = +25°C, VS = +5V, and RL = 1Mconnected to VS/2, unless otherwise noted.  
OPEN-LOOP GAIN vs TEMPERATURE  
OPEN-LOOP GAIN AND PHASE vs FREQUENCY  
100  
100  
95  
90  
85  
80  
75  
70  
65  
60  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
0
Gain  
RL = 1M  
45  
90  
135  
180  
Single version operation  
below 0°C is not recommended.  
RL = 10kΩ  
Phase  
0.1  
1
10  
100  
1k  
10k  
100k  
1M  
75  
50  
25  
0
25  
50  
75 85  
75 85  
75 85  
Frequency (Hz)  
Temperature (°C)  
COMMON-MODE REJECTION RATIO  
vs TEMPERATURE  
COMMON-MODE REJECTION RATIO vs FREQUENCY  
80  
70  
60  
50  
40  
30  
20  
10  
0
80  
75  
70  
65  
60  
55  
50  
0.2V < VCM < 3.5V  
Single version operation  
below 0°C is not recommended.  
0.2V < VCM < 5.2V  
10  
100  
1k  
10k  
100k  
75  
50  
25  
0
25  
50  
Frequency (Hz)  
Temperature (°C)  
POWER-SUPPLY REJECTION RATIO  
vs TEMPERATURE  
POWER-SUPPLY REJECTION RATIO vs FREQUENCY  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
80  
70  
60  
50  
40  
+PSRR  
PSRR  
Single version operation  
below 0°C is not recommended.  
10  
100  
1k  
Frequency (Hz)  
10k  
100k  
75  
50  
25  
0
25  
50  
Temperature (°C)  
OPA349, 2349  
5
SBOS121B  
www.ti.com  
TYPICAL CHARACTERISTICS (Cont.)  
At TA = +25°C, VS = +5V, and RL = 1Mconnected to VS/2, unless otherwise noted.  
QUIESCENT AND SHORT-CIRCUIT  
vs SUPPLY VOLTAGE  
QUIESCENT CURRENT vs TEMPERATURE  
3.0  
1.4  
1.2  
1.0  
0.8  
0.6  
0.4  
12  
10  
8
ISC at 40°C  
(dual version only)  
2.5  
2.0  
ISC at 25°C  
OPA2349  
1.5  
1.0  
6
IQ  
I
SC at 125°C  
OPA349  
4
0.5  
0.0  
2
75  
50  
25  
0
25  
50  
75 85  
1.5  
2.0  
2.5  
3.0  
3.5  
4.0  
4.5  
5.0  
5.5  
Temperature (°C)  
Supply Voltage (V)  
SHORT-CIRCUIT CURRENT vs TEMPERATURE  
VS = +5.5V  
INPUT BIAS CURRENT vs TEMPERATURE  
15  
10k  
1k  
10  
5
VS = +2.5V  
100  
10  
0
VS = +1.8V  
5  
10  
15  
Single version operation  
below 0°C is not recommended.  
VS = +2.5V  
Single version operation  
below 0°C is not recommended.  
1
VS = +5.5V  
0.1  
55  
35  
15  
0 5  
25  
45  
65  
85  
85  
75  
75  
50  
25  
0
25  
50  
Temperature (°C)  
Temperature (°C)  
INPUT VOLTAGE NOISE DENSITY  
CHANNEL SEPARATION vs FREQUENCY  
1000  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
400  
100  
10  
100  
1k  
10k  
10  
100  
1k  
10k  
100k  
Frequency (Hz)  
Frequency (Hz)  
OPA349, 2349  
6
SBOS121B  
www.ti.com  
TYPICAL CHARACTERISTICS (Cont.)  
At TA = +25°C, VS = +5V, and RL = 1Mconnected to VS/2, unless otherwise noted.  
OFFSET VOLTAGE DRIFT  
PRODUCTION DISTRIBUTION  
OUTPUT VOLTAGE vs OUTPUT CURRENT  
(V+)  
(V+) 1  
(V+) 2  
(V) + 2  
(V) + 1  
(V)  
40°C  
(dual version  
only)  
125°C  
25°C  
0
1
2
3
4
5
6
7
8
9
10  
30 25 20 15 10 5  
0
5
10 15 20 25 30 35 40  
Output Current (mA)  
Offset Voltage Drift (µV/°C)  
LARGE-SIGNAL STEP RESPONSE  
G = 1, RL = 1MΩ  
MAXIMUM OUTPUT VOLTAGE vs FREQUENCY  
VS = +5.5V  
6
5
4
3
2
1
0
VS = +5V  
VS = +2.5V  
VS = +1.8V  
100  
1k  
10k  
100k  
100µs/div  
Frequency (Hz)  
SMALL-SIGNAL STEP RESPONSE  
SMALL-SIGNAL STEP RESPONSE  
G = 1, RL = 1M, CL = 500pF  
G = 1, RL = 1M, CL = 20pF  
100µs/div  
40µs/div  
OPA349, 2349  
7
SBOS121B  
www.ti.com  
TYPICAL CHARACTERISTICS (Cont.)  
At TA = +25°C, VS = +5V, and RL = 1Mconnected to VS/2, unless otherwise noted.  
SMALL-SIGNAL OVERSHOOT vs LOAD CAPACITANCE  
(SOT23, SO-8)  
SMALL-SIGNAL OVERSHOOT vs LOAD CAPACITANCE  
(SC70)  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
100  
90  
80  
70  
60  
G = 1V/V  
G = +1V/V  
50  
G = 1V/V, RL = 1MΩ  
40  
30  
G = +1V/V, RL = 1MΩ  
20  
10  
0
10  
100  
1k  
10  
100  
1k  
Load Capacitance (pF)  
Load Capacitance (pF)  
OPA349, 2349  
8
SBOS121B  
www.ti.com  
biased with a voltage divider. Resistor values must be very  
large to minimize current. The large feedback resistor value  
reacts with input capacitance and stray capacitance to pro-  
duce a pole in the feedback network. A feedback capacitor  
may be required to assure stability and limit overshoot or  
gain peaking. Check circuit performance carefully to assure  
that biasing and feedback techniques meet signal and quies-  
cent current requirements.  
APPLICATIONS INFORMATION  
The OPA349 series op amps are unity-gain stable and can  
operate on a single supply, making them highly versatile and  
easy to use. Power-supply pins should be bypassed with  
0.01µF ceramic capacitors.  
The OPA349 series op amps are fully specified and tested  
from +1.8V to +5.5V. Parameters that vary significantly with  
operating voltages or temperature are shown in the Typical  
Characteristic curves.  
RAIL-TO-RAIL INPUT  
The input common-mode voltage range of the OPA349 series  
extends 200mV beyond the supply rails. This is achieved with a  
complementary input stagean N-channel input differential pair  
inparallelwithaP-channeldifferentialpair(asshowninFigure2).  
TheN-channelpairisactiveforinputvoltagesclosetothepositive  
rail, typically (V+) 1.3V to 200mV above the positive supply,  
while the P-channel pair is on for inputs from 200mV below the  
negative supply to approximately (V+) 1.3V. There is a small  
transitionregion,typically(V+)1.5Vto(V+)1.1V,inwhichboth  
pairs are on. This 400mV transition region can vary 300mV with  
processvariation.Thus,thetransitionregion(bothstageson)can  
range from (V+) 1.8V to (V+) 1.4V on the low end, up to  
(V+) 1.2V to (V+) 0.8V on the high end. Within the 400mV  
transition region PSRR, CMRR, offset voltage, offset drift, and  
THDmaybedegradedcomparedtooperationoutsidethisregion.  
For more information on designing with rail-to-rail input op amps,  
see Figure 3, Design Optimization with Rail-to-Rail Input Op  
Amps.  
The ultra-low quiescent current of the OPA349 requires  
careful application circuit techniques to achieve low overall  
current consumption. Figure 1 shows an ac-coupled amplifier  
+1.8V to 5.5V  
CF  
CF may be required  
for best stability or to  
3pF  
reduce frequency  
peakingsee text.  
R1  
10M  
R3  
2M  
R5  
10M  
G = 11  
VOUT  
10nF  
OPA349  
R2  
R4  
10M  
2M  
FIGURE 1. AC-Coupled Amplifier.  
V+  
Reference  
Current  
VIN  
+
VIN  
VBIAS1  
Class AB  
Control  
VO  
Circuitry  
VBIAS2  
V–  
(Ground)  
FIGURE 2. Simplified Schematic.  
OPA349, 2349  
9
SBOS121B  
www.ti.com  
DESIGN OPTIMIZATION WITH RAIL-TO-RAIL INPUT OP AMPS  
In most applications, operation is within the range of only one  
wide input swing is required. A design option would be to  
configure the op amp as a unity-gain inverter as shown below  
andholdthenoninvertinginputatasetcommon-modevoltage  
outside the transition region. This can be accomplished with a  
voltage divider from the supply. The voltage divider should be  
designed such that the biasing point for the noninverting input  
is outside the transition region.  
differential pair. However, some applications can subject the  
amplifier to a common-mode signal in the transition region.  
Under this condition, the inherent mismatch between the two  
differential pairs may lead to degradation of the CMRR and  
THD. The unity-gain buffer configuration is the most problem-  
aticitwilltraversethroughthetransitionregionifasufficiently  
R
R
VOUT  
VIN  
VCM  
FIGURE 3. Design Optimization.  
COMMON-MODE REJECTION  
Figure 4a). Similarly, loads that can cause current to flow out  
of the output pin when the output voltage is near Vcan  
cause oscillations. The op amp will recover to normal opera-  
tion a few microseconds after the output is driven positively  
out of the rail.  
TheCMRRfortheOPA349is specifiedintwowayssothebest  
match for a given application may be used. First, the CMRR of  
the device in the common-mode range below the transition  
region (VCM < (V+) 1.5V) is given. This specification is the  
best indicator of the capability of the device when the applica-  
tion requires use of one of the differential input pairs. Second,  
the CMRR at VS = 5V over the entire common-mode range is  
specified.  
Some op amp applications can produce this condition even  
without a load connected to V. The integrator in Figure 4b  
shows an example of this effect. Assume that the output  
ramps negatively, and saturates near 0V. Any negative-  
going step at VIN will produce a positive output current pulse  
through R1 and C1. This may incite the oscillation. Diode D1  
prevents the input step from pulling output current when the  
output is saturated at the rail, thus preventing the oscillation.  
OUTPUT DRIVEN TO VRAIL  
Loads that connect to single-supply ground (or the Vsupply  
pin) can cause the OPA349 or OPA2349 to oscillate if the  
output voltage is driven into the negative rail (as shown in  
V+  
a)  
b)  
R1  
C1  
V+  
1M  
1nF  
VIN  
0V  
D1  
1N4148  
2V  
0V  
VO  
OPA349  
OPA349  
(No Load)  
VIN  
RL  
1V  
0V  
FIGURE 4. Output Driven to Negative Rail.  
OPA349, 2349  
10  
SBOS121B  
www.ti.com  
PACKAGE OPTION ADDENDUM  
www.ti.com  
24-Jan-2013  
PACKAGING INFORMATION  
Orderable Device  
OPA2349EA/250  
OPA2349EA/3K  
OPA2349UA  
Status Package Type Package Pins Package Qty  
Eco Plan Lead/Ball Finish  
MSL Peak Temp  
Op Temp (°C)  
Top-Side Markings  
Samples  
Drawing  
(1)  
(2)  
(3)  
(4)  
ACTIVE  
SOT-23  
SOT-23  
SOIC  
DCN  
8
8
8
8
8
8
5
5
5
5
5
5
5
5
8
8
8
250  
3000  
75  
Green (RoHS  
& no Sb/Br)  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
Level-2-260C-1 YEAR  
Level-2-260C-1 YEAR  
Level-2-260C-1 YEAR  
Level-2-260C-1 YEAR  
Level-2-260C-1 YEAR  
Level-2-260C-1 YEAR  
Level-2-260C-1 YEAR  
Level-2-260C-1 YEAR  
Level-2-260C-1 YEAR  
Level-2-260C-1 YEAR  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-2-260C-1 YEAR  
Level-2-260C-1 YEAR  
Level-2-260C-1 YEAR  
C49  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
DCN  
D
Green (RoHS  
& no Sb/Br)  
C49  
Green (RoHS  
& no Sb/Br)  
OPA  
2349UA  
OPA2349UA/2K5  
OPA2349UA/2K5G4  
OPA2349UAG4  
OPA349NA/250  
OPA349NA/250G4  
OPA349NA/3K  
SOIC  
D
2500  
2500  
75  
Green (RoHS  
& no Sb/Br)  
OPA  
2349UA  
SOIC  
D
Green (RoHS  
& no Sb/Br)  
OPA  
2349UA  
SOIC  
D
Green (RoHS  
& no Sb/Br)  
OPA  
2349UA  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SC70  
DBV  
DBV  
DBV  
DBV  
DCK  
DCK  
DCK  
DCK  
D
250  
Green (RoHS  
& no Sb/Br)  
A49  
A49  
A49  
A49  
S49  
S49  
S49  
S49  
250  
Green (RoHS  
& no Sb/Br)  
3000  
3000  
250  
Green (RoHS  
& no Sb/Br)  
OPA349NA/3KG4  
OPA349SA/250  
OPA349SA/250G4  
OPA349SA/3K  
Green (RoHS  
& no Sb/Br)  
Green (RoHS  
& no Sb/Br)  
SC70  
250  
Green (RoHS  
& no Sb/Br)  
SC70  
3000  
3000  
75  
Green (RoHS  
& no Sb/Br)  
OPA349SA/3KG4  
OPA349UA  
SC70  
Green (RoHS  
& no Sb/Br)  
SOIC  
Green (RoHS  
& no Sb/Br)  
OPA  
349UA  
OPA349UA/2K5  
OPA349UA/2K5G4  
SOIC  
D
2500  
2500  
Green (RoHS  
& no Sb/Br)  
OPA  
349UA  
SOIC  
D
Green (RoHS  
& no Sb/Br)  
OPA  
349UA  
Addendum-Page 1  
PACKAGE OPTION ADDENDUM  
www.ti.com  
24-Jan-2013  
Orderable Device  
OPA349UAG4  
Status Package Type Package Pins Package Qty  
Eco Plan Lead/Ball Finish  
MSL Peak Temp  
Op Temp (°C)  
Top-Side Markings  
Samples  
Drawing  
(1)  
(2)  
(3)  
(4)  
ACTIVE  
SOIC  
D
8
75  
Green (RoHS  
& no Sb/Br)  
CU NIPDAU  
Level-2-260C-1 YEAR  
OPA  
349UA  
(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) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability  
information and additional product content details.  
TBD: The Pb-Free/Green conversion plan has not been defined.  
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that  
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.  
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between  
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.  
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight  
in homogeneous material)  
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.  
(4) Only one of markings shown within the brackets will appear on the physical device.  
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  
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  
8-Apr-2013  
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)  
OPA2349EA/250  
OPA2349EA/3K  
OPA349SA/250  
OPA349SA/3K  
OPA349UA/2K5  
SOT-23  
SOT-23  
SC70  
DCN  
DCN  
DCK  
DCK  
D
8
8
5
5
8
250  
3000  
250  
180.0  
180.0  
179.0  
179.0  
330.0  
8.4  
8.4  
3.2  
3.2  
2.2  
2.2  
6.4  
3.1  
3.1  
2.5  
2.5  
5.2  
1.39  
1.39  
1.2  
4.0  
4.0  
4.0  
4.0  
8.0  
8.0  
8.0  
Q3  
Q3  
Q3  
Q3  
Q1  
8.4  
8.0  
SC70  
3000  
2500  
8.4  
1.2  
8.0  
SOIC  
12.4  
2.1  
12.0  
Pack Materials-Page 1  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
8-Apr-2013  
*All dimensions are nominal  
Device  
Package Type Package Drawing Pins  
SPQ  
Length (mm) Width (mm) Height (mm)  
OPA2349EA/250  
OPA2349EA/3K  
OPA349SA/250  
OPA349SA/3K  
OPA349UA/2K5  
SOT-23  
SOT-23  
SC70  
DCN  
DCN  
DCK  
DCK  
D
8
8
5
5
8
250  
3000  
250  
210.0  
210.0  
203.0  
203.0  
367.0  
185.0  
185.0  
203.0  
203.0  
367.0  
35.0  
35.0  
35.0  
35.0  
35.0  
SC70  
3000  
2500  
SOIC  
Pack Materials-Page 2  
IMPORTANT NOTICE  
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