OPA4379AIPWRG4 [TI]
1.8V, 2.9mA, 90kHz, Rail-to-Rail I/O PERATIONAL AMPLIFIERS; 1.8V ， 2.9毫安， 90KHz的轨至轨输入/输出放大器PERATIONAL
| 型号： | OPA4379AIPWRG4 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 1.8V, 2.9mA, 90kHz, Rail-to-Rail I/O PERATIONAL AMPLIFIERS |
| 文件： | 总29页 (文件大小：1389K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
OPA379
OPA2379
OPA4379
www.ti.com ................................................................................................................................................... SBOS347D–NOVEMBER 2005–REVISED MAY 2008
1.8V, 2.9µA, 90kHz, Rail-to-Rail I/O
OPERATIONAL AMPLIFIERS
1
FEATURES
DESCRIPTION
2
•
•
•
•
LOW NOISE: 2.8µVPP (0.1Hz - 10Hz)
The OPA379 family of micropower, low-voltage
operational amplifiers is designed for battery-powered
applications. These amplifiers operate on a supply
voltage as low as 1.8V (±0.9V). High-performance,
single-supply operation with rail-to-rail capability
(10µV max) makes the OPA379 family useful for a
wide range of applications.
microPower: 5.5µA (max)
LOW OFFSET VOLTAGE: 1.5mV (max)
DC PRECISION:
–
–
–
CMRR: 100dB
PSRR: 2µV/V
AOL: 120dB
In addition to microSize packages, the OPA379 family
of op amps features impressive bandwidth (90kHz),
low bias current (5pA), and low noise (80nV/√Hz)
relative to the very low quiescent current (5.5µA
max).
•
•
WIDE SUPPLY VOLTAGE RANGE: 1.8V to 5.5V
microSize PACKAGES:
–
SC70-5, SOT23-5, SOT23-8, SO-8, TSSOP-14
APPLICATIONS
The OPA379 (single) is available in SC70-5,
SOT23-5, and SO-8 packages. The OPA2379 (dual)
comes in SOT23-8 and SO-8 packages. The
OPA4379 (quad) is offered in a TSSOP-14 package.
All versions are specified from –40°C to +125°C.
•
•
•
•
BATTERY-POWERED INSTRUMENTS
PORTABLE DEVICES
MEDICAL INSTRUMENTS
HANDHELD TEST EQUIPMENT
xxx
xxx
xxx
xxx
xxx
xxx
xxx
VS
Table 1. OPAx379 RELATED PRODUCTS
FEATURES
PRODUCT
OPAx349
TLV240x
TLV224x
TLV27Lx
TLV238x
OPAx347
TLV276x
OPAx348
1/2
C2
OPA2379
1µA, 70kHz, 2mV VOS, 1.8V to 5.5V Supply
1µA, 5.5kHz, 390µV VOS, 2.5V to 16V Supply
1µA, 5.5kHz, 0.6mV VOS, 2.5V to 12V Supply
7µA, 160kHz, 0.5mV VOS, 2.7V to 16V Supply
7µA, 160kHz, 0.5mV VOS, 2.7V to 16V Supply
20µA, 350kHz, 2mV VOS, 2.3V to 5.5V Supply
20µA, 500kHz, 550µV VOS, 1.8V to 3.6V Supply
45µA, 1MHz, 1mV VOS, 2.1V to 5.5V Supply
C1
C
RF
REF
S
VS
W
RB
RL
1/2
OPA2379
R1
VOUT
R1
Figure 1. OPA2379 in Portable Gas Meter
Application
1
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.
2
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 the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2005–2008, Texas Instruments Incorporated
OPA379
OPA2379
OPA4379
SBOS347D–NOVEMBER 2005–REVISED MAY 2008 ................................................................................................................................................... www.ti.com
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.
ABSOLUTE MAXIMUM RATINGS(1)
Over operating free-air temperature range (unless otherwise noted).
OPA379, OPA2379, OPA4379
UNIT
V
Supply Voltage
VS = (V+) – (V–)
+7
(V–) – 0.5 to (V+) + 0.5
±10
Signal Input Terminals, Voltage(2)
Signal Input Terminals, Current(2)
Output Short-Circuit(3)
V
mA
Continuous
–40 to +125
–65 to +150
+150
Operating Temperature
Storage Temperature
TA
TA
°C
°C
°C
V
Junction Temperature
TJ
Human Body Model
ESD Rating
(HBM)
(CDM)
2000
Charged Device Model
1000
V
(1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may
degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond
those specified is not supported.
(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)
PRODUCT
PACKAGE-LEAD
SC70−5
PACKAGE DESIGNATOR
PACKAGE MARKING
AYR
DCK
DBV
D
OPA379
SOT23−5
SO−8
B53
OPA379A
B61
SOT23−8
SO−8
DCN
D
OPA2379
OPA4379
OPA2379A
OPA4379A
TSSOP−14
PW
(1) For the most current package and ordering information see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
2
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OPA379
OPA2379
OPA4379
www.ti.com ................................................................................................................................................... SBOS347D–NOVEMBER 2005–REVISED MAY 2008
PIN CONFIGURATIONS
OPA379
SC70-5
OPA379
SOT23-5
(TOP VIEW)
(TOP VIEW)
V+
5
+IN
V-
1
2
3
OUT
V-
1
2
3
5
4
V+
OUT
4
-IN
+IN
-IN
OPA379
SO-8
OPA2379(2)
SOT23-8
(TOP VIEW)
(TOP VIEW)
NC(1)
-IN
+IN
V-
1
8
NC(1)
V+
1
OUT A
-IN
8
7
6
5
V+
2
3
4
OUT B
-IN B
+IN B
2
3
4
7
6
5
+IN
OUT
NC(1)
V-
OPA2379
SO-8
OPA4379
TSSOP-14
(TOP VIEW)
(TOP VIEW)
OUT A
-IN A
+IN A
V+
1
2
3
4
5
6
7
14 OUT D
OUT A
-IN A
+IN A
V-
1
2
3
4
8
7
6
5
V+
13 -IN D
12 +IN D
11 V-
OUT B
-IN B
+IN B
+IN B
-IN B
OUT B
10 +IN C
9
8
-IN C
OUT C
(1) NC denotes no internal connection.
(2) Pin 1 of the SOT23−8 package is determined by orienting the
package marking as shown.
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OPA379
OPA2379
OPA4379
SBOS347D–NOVEMBER 2005–REVISED MAY 2008 ................................................................................................................................................... www.ti.com
ELECTRICAL CHARACTERISTICS: VS = +1.8V to +5.5V
Boldface limits apply over the specified temperature range indicated.
At TA = +25°C, RL = 25kΩ connected to VS/2, and VCM < (V+) – 1V, unless otherwise noted.
OPA379, OPA2379, OPA4379
PARAMETER
OFFSET VOLTAGE
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Initial Offset Voltage
Over –40°C to +125°C
Drift, –40°C to +85°C
Drift, –40°C to +125°C
vs Power Supply
VOS
dVOS/dT
PSRR
VS = 5V
0.4
1.5
mV
mV
2
1.5
2.7
2
µV/°C
µV/°C
µV/V
µV/V
10
Over –40°C to +125°C
INPUT VOLTAGE RANGE
Common-Mode Voltage Range
Common-Mode Rejection Ratio(1)
Over –40°C to +85°C
Over –40°C to +125°C
INPUT BIAS CURRENT
Input Bias Current
20
VCM
(V–) – 0.1 to (V+) + 0.1
V
CMRR
(V–) < VCM < (V+) – 1V
(V–) < VCM < (V+) – 1V
(V–) < VCM < (V+) – 1V
90
100
dB
dB
dB
80
62
IB
VS = 5V, VCM ≤ VS/2
±5
±5
±50
±50
pA
pA
Input Offset Current
IOS
VS = 5V
INPUT IMPEDANCE
Differential
1013 || 3
1013 || 6
Ω || pF
Ω || pF
Common-Mode
NOISE
Input Voltage Noise
f = 0.1Hz to 10Hz
f = 1kHz
2.8
80
1
µVPP
Input Voltage Noise Density
Input Current Noise Density
OPEN-LOOP GAIN
en
in
nV/√Hz
fA/√Hz
f = 1kHz
Open-Loop Voltage Gain
Over –40°C to +125°C
AOL
VS = 5V, RL = 25kΩ, 100mV < VO < (V+) – 100mV
VS = 5V, RL = 25kΩ, 100mV < VO < (V+) – 100mV
VS = 5V, RL = 5kΩ, 500mV < VO < (V+) – 500mV
VS = 5V, RL = 5kΩ, 500mV < VO < (V+) – 500mV
100
80
120
120
dB
dB
dB
dB
100
80
Over –40°C to +125°C
OUTPUT
Voltage Output Swing from Rail
Over –40°C to +125°C
RL = 25kΩ
RL = 25kΩ
RL = 5kΩ
RL = 5kΩ
5
10
15
50
75
mV
mV
mV
mV
mA
25
Over –40°C to +125°C
Short-Circuit Current
ISC
CLOAD
ROUT
RO
±5
Capacitive Load Drive
Closed-Loop Output Impedance
Open-Loop Output Impedance
FREQUENCY RESPONSE
Gain Bandwidth Product
Slew Rate
See Typical Characteristics
G = 1, f = 1kHz, IO = 0
f = 100kHz, IO = 0
CLOAD = 30pF
10
28
Ω
kΩ
GBW
SR
90
0.03
25
kHz
V/µs
µs
G = +1
Overload Recovery Time
Turn-On Time
VIN × GAIN > VS
tON
1
ms
(1) See Typical Characteristic gragh, Common-Mode Rejection Ratio vs Frequency (Figure 3).
4
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OPA379
OPA2379
OPA4379
www.ti.com ................................................................................................................................................... SBOS347D–NOVEMBER 2005–REVISED MAY 2008
ELECTRICAL CHARACTERISTICS: VS = +1.8V to +5.5V (continued)
Boldface limits apply over the specified temperature range indicated.
At TA = +25°C, RL = 25kΩ connected to VS/2, and VCM < (V+) – 1V, unless otherwise noted.
OPA379, OPA2379, OPA4379
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
POWER SUPPLY
Specified/Operating Voltage Range
Quiescent Current per Amplifier
Over –40°C to +125°C
TEMPERATURE
VS
IQ
1.8
5.5
5.5
10
V
VS = 5.5V, IO = 0
2.9
µA
µA
Specified/Operating Range
Storage Range
TA
TJ
–40
–65
+125
+150
°C
°C
Thermal Resistance
SC70−5
θJA
250
200
150
°C/W
°C/W
°C/W
SOT23−5
SOT23−8, TSSOP−14, SO−8
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OPA379
OPA2379
OPA4379
SBOS347D–NOVEMBER 2005–REVISED MAY 2008 ................................................................................................................................................... www.ti.com
TYPICAL CHARACTERISTICS
At TA = +25°C, VS = 5V, and RL = 25kΩ connected to VS/2, unless otherwise noted.
COMMON-MODE AND
POWER-SUPPLY REJECTION RATIO
vs FREQUENCY
OPEN-LOOP GAIN AND PHASE
vs FREQUENCY
120
100
80
60
40
20
0
120
100
80
60
40
20
0
0
-30
-60
-90
-120
-150
-180
-PSRR
+PSRR
CMRR
0.1
1
10
100
1k
10k
100k
0.1
1
10
100
1k
10k
100k
Frequency (Hz)
Frequency (Hz)
Figure 2.
Figure 3.
MAXIMUM OUTPUT VOLTAGE
vs FREQUENCY
QUIESCENT CURRENT
vs SUPPLY VOLTAGE
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
3.5
3.0
2.5
2.0
1.5
1k
10k
100k
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Frequency (Hz)
Figure 4.
Supply Voltage (V)
Figure 5.
OUTPUT VOLTAGE
vs OUTPUT CURRENT
SHORT-CIRCUIT CURRENT
vs SUPPLY VOLTAGE
2.5
25
20
15
10
5
2.0
1.5
+ISC
VS = ±2.5V
1.0
0.5
-ISC
+125°C
+85°C
+25°C
-40°C
0
-0.5
-1.0
-1.5
-2.0
-2.5
0
1
2
3
4
5
6
7
8
9
10
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
IOUT (mA)
Supply Voltage (V)
Figure 6.
Figure 7.
6
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OPA2379
OPA4379
www.ti.com ................................................................................................................................................... SBOS347D–NOVEMBER 2005–REVISED MAY 2008
TYPICAL CHARACTERISTICS (continued)
At TA = +25°C, VS = 5V, and RL = 25kΩ connected to VS/2, unless otherwise noted.
OFFSET VOLTAGE vs COMMON-MODE VOLTAGE
vs TEMPERATURE
OFFSET VOLTAGE
PRODUCTION DISTRIBUTION
15.0
12.5
10.0
7.5
Unit 1
Common-Mode Input Range
CMRR Specified Range
5.0
2.5
0
-2.5
-5.0
-7.5
-10.0
-12.5
-15.0
-40°C
+85°C
Unit 2
+125°C
-0.5
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
Common-Mode Voltage (V)
Offset Voltage (mV)
Figure 8.
Figure 9.
OFFSET VOLTAGE DRIFT DISTRIBUTION
OFFSET VOLTAGE DRIFT DISTRIBUTION
(–40°C to +85°C)
(–40°C to +125°C)
£ 1
£ 2
£ 3
£ 4
£ 5
> 5
£ 1
£ 2
£ 3
£ 4
£ 5
> 5
Offset Voltage Drift (mV/°C)
Offset Voltage Drift (mV/°C)
Figure 10.
Figure 11.
QUIESCENT CURRENT
vs TEMPERATURE
QUIESCENT CURRENT
PRODUCTION DISTRIBUTION
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
-50
-25
0
25
50
75
100
125
Temperature (°C)
Quiescent Current (mA)
Figure 12.
Figure 13.
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OPA2379
OPA4379
SBOS347D–NOVEMBER 2005–REVISED MAY 2008 ................................................................................................................................................... www.ti.com
TYPICAL CHARACTERISTICS (continued)
At TA = +25°C, VS = 5V, and RL = 25kΩ connected to VS/2, unless otherwise noted.
INPUT BIAS CURRENT
vs TEMPERATURE
0.1Hz TO 10Hz NOISE
10000
1000
100
10
1
0.1
0.01
2.5s/div
-50
-25
0
25
50
75
100
125
Temperature (°C)
Figure 14.
Figure 15.
SMALL-SIGNAL OVERSHOOT
vs CAPACITIVE LOAD
NOISE vs FREQUENCY
1000
100
10
60
50
40
30
20
10
0
G = +1
G = -1
1
10
100
1k
10k
10
100
1000
Frequency (Hz)
Figure 16.
Capacitive Load (pF)
Figure 17.
SMALL-SIGNAL STEP RESPONSE
LARGE-SIGNAL STEP RESPONSE
25ms/div
50ms/div
Figure 18.
Figure 19.
8
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OPA379
OPA2379
OPA4379
www.ti.com ................................................................................................................................................... SBOS347D–NOVEMBER 2005–REVISED MAY 2008
APPLICATION INFORMATION
The OPA379 family of operational amplifiers
minimizes power consumption without compromising
VS
bandwidth or noise. Power-supply rejection ratio
(PSRR), common-mode rejection ratio (CMRR), and
open-loop gain (AOL) typical values are 100dB or
IOVERLOAD
10mA max
OPA379
VOUT
better.
VIN
5kW
When designing for ultra-low power, choose system
components
carefully.
To
minimize
current
consumption, select large-value resistors. Any
resistors will react with stray capacitance in the circuit
and the input capacitance of the operational amplifier.
These parasitic RC combinations can affect the
stability of the overall system. A feedback capacitor
may be required to assure stability and limit
overshoot or gain peaking.
Figure 20. Input Current Protection for Voltages
Exceeding the Supply Voltage
NOISE
Although micropower amplifiers frequently have high
wideband noise, the OPA379 series offer excellent
noise performance. Resistors should be chosen
carefully because the OPA379 has only 2.8µVPP of
0.1Hz to 10Hz noise, and 80nV/√Hz of wideband
noise; otherwise, they can become the dominant
source of noise.
Good layout practice mandates the use of a 0.1µF
bypass capacitor placed closely across the supply
pins.
OPERATING VOLTAGE
OPA379 series op amps are fully specified and tested
from +1.8V to +5.5V (±0.9V to ±2.75V). Parameters
that will vary with supply voltage are shown in the
Typical Characteristics curves.
CAPACITIVE LOAD AND STABILITY
Follower configurations with load capacitance in
excess of 30pF can produce extra overshoot (see
typical characteristic Small-Signal Overshoot vs
Capacitive Load, Figure 17) and ringing in the output
signal. Increasing the gain enhances the ability of the
amplifier to drive greater capacitive loads. In
unity-gain configurations, capacitive load drive can be
improved by inserting a small (10Ω to 20Ω) resistor,
RS, in series with the output, as shown in Figure 21.
This resistor significantly reduces ringing while
maintaining direct current (dc) performance for purely
capacitive loads. However, if there is a resistive load
in parallel with the capacitive load, a voltage divider is
created, introducing a dc error at the output and
slightly reducing the output swing. The error
introduced is proportional to the ratio RS/RL, and is
generally negligible.
INPUT COMMON-MODE VOLTAGE RANGE
The input common-mode voltage range of the
OPA379 family typically extends 100mV beyond each
supply rail. This rail-to-rail input is achieved using a
complementary input stage. CMRR is specified from
the negative rail to 1V below the positive rail.
Between (V+) – 1V and (V+) + 0.1V, the amplifier
operates with higher offset voltage because of the
transition region of the input stage. See the typical
characteristic, Offset Voltage vs Common-Mode
Voltage vs Temperature (Figure 8).
PROTECTING INPUTS FROM
OVER-VOLTAGE
Normally, input currents are 5pA. However, a large
voltage input (greater than 500mV beyond the supply
rails) can cause excessive current to flow in or out of
the input pins. Therefore, as well as keeping the input
voltage below the maximum rating, it is also important
to limit the input current to less than 10mA. This
limiting is easily accomplished with an input voltage
resistor, as shown in Figure 20.
VS
RS
VOUT
OPA379
10W to
20W
VIN
CL
RL
Figure 21. Series Resistor in Unity-Gain Buffer
Configuration Improves Capacitive Load Drive
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VREF
In unity-gain inverter configuration, phase margin can
be reduced by the reaction between the capacitance
RF =
1000(IBMAX
)
at the op amp input and the gain setting resistors.
Best performance is achieved by using smaller
valued resistors. However, when large valued
resistors cannot be avoided, a small (4pF to 6pF)
capacitor, CFB, can be inserted in the feedback, as
shown in Figure 22. This configuration significantly
reduces overshoot by compensating the effect of
capacitance, CIN, which includes the amplifier input
capacitance (3pf) and printed circuit board (PC)
parasitic capacitance.
1.2V
=
1000(100pA)
= 12MW » 10MW
(1)
2. Choose the hysteresis voltage, VHYST. For battery
monitoring applications, 50mV is adequate.
3. Calculate R1 as follows:
VHYST
50mW
R1 = RF
= 10MW
= 210kW
VBATT
2.4V
(2)
CFB
4. Select a threshold voltage for VIN rising (VTHRS) =
2.0V
RF
5. Calculate R2 as follows:
1
RIN
R2 =
VIN
VTHRS
1
1
OPA379
VOUT
-
-
CIN
VREF ´ R1
R1
RF
1
=
2V
1
1
Figure 22. Improving Stability for Large RF and RIN
BATTERY MONITORING
-
-
1.2V ´ 210kW
210kW
10MW
= 325kW
(3)
The low operating voltage and quiescent current of
the OPA379 series make it an excellent choice for
battery monitoring applications, as shown in
Figure 23. In this circuit, VSTATUS is high as long as
the battery voltage remains above 2V. A low-power
reference is used to set the trip point. Resistor values
are selected as follows:
6. Calculate RBIAS: The minimum supply voltage for
this circuit is 1.8V. The REF1112 has a current
requirement of 1.2µA (max). Providing 2µA of
supply current assures proper operation.
Therefore:
(VBATTMIN - VREF
)
(1.8V - 1.2V)
2mA
RBIAS
=
=
= 0.3MW
IBIAS
(4)
1. RF Selecting: Select RF such that the current
through RF is approximately 1000x larger than
the maximum bias current over temperature:
RF
R1
+IN
+
IBIAS
OUT
OPA379
VSTATUS
VBATT
-IN
RBIAS
VREF
R2
REF1112
Figure 23. Battery Monitor
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WINDOW COMPARATOR
The window comparator threshold voltages are set as
follows:
R2
Figure 24 shows the OPA2379 used as a window
comparator. The threshold limits are set by VH and
VL, with VH > VL. When VIN < VH, the output of A1 is
low. When VIN > VL, the output of A2 is low.
Therefore, both op amp outputs are at 0V as long as
VIN is between VH and VL. This architecture results in
no current flowing through either diode, Q1 in cutoff,
with the base voltage at 0V, and VOUT forced high.
VH =
´ VS
R1 + R2
R4
(5)
(6)
VL =
´ VS
R3 + R4
If VIN falls below VL, the output of A2 is high, current
flows through D2, and VOUT is low. Likewise, if VIN
rises above VH, the output of A1 is high, current flows
through D1, and VOUT is low.
VS
VS
R1
VH
A1
D1(2)
1/2
VS
OPA2379
R2
R7
5.1kW
RIN
VOUT
R5
(1)
2kW
10kW
Q1(3)
VIN
R6
5.1kW
VS
VS
D2(2)
A2
1/2
R3
OPA2379
VL
R4
(1) RIN protects A1 and A2 from possible excess current flow.
(2) IN4446 or equivalent diodes.
(3) 2N2222 or equivalent NPN transistor.
Figure 24. OPA2379 as a Window Comparator
Copyright © 2005–2008, Texas Instruments Incorporated
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OPA379
OPA2379
OPA4379
SBOS347D–NOVEMBER 2005–REVISED MAY 2008 ................................................................................................................................................... www.ti.com
ADDITIONAL APPLICATION EXAMPLES
Figure 25 through Figure 29 illustrate additional application examples.
+2.7V
R3
R2
VCC
+2.7V
MSP430x20x3PW
R1
66.5W
A0+
16-Bit
ADC
OPA379
C1
VIN
1.5nF
VREF
REF3312
VSS
C2
1mF
Figure 25. Unipolar Signal Chain Configuration
VEX
R1
VS
R
R
R
R
VOUT
OPA379
R1
VREF
Figure 26. Single Op Amp Bridge Amplifier
3V
REF3130
+5V
Load
R1
4.99kW
R2
49.9kW
R6
71.5kW
RN
56W
V
RSHUNT
1W
ILOAD
OPA379
I2C
R3
4.99kW
R4
48.7kW
RN
56W
ADS1100
R7
1.18kW
(PGA Gain = 4)
FS = 3.0V
Stray Ground-Loop Resistance
NOTE: 1% resistors provide adequate common-mode rejection at small ground-loop errors.
Figure 27. Low-Side Current Monitor
12
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Copyright © 2005–2008, Texas Instruments Incorporated
Product Folder Link(s): OPA379 OPA2379 OPA4379
OPA379
OPA2379
OPA4379
www.ti.com ................................................................................................................................................... SBOS347D–NOVEMBER 2005–REVISED MAY 2008
RG
zener(1)
V+
RSHUNT
(2)
R1
10kW
MOSFET rated to
stand-off supply voltage
such as BSS84 for
up to 50V.
OPA379
V-
+5V
Two zener
biasing methods
are shown.(3)
Output
Load
RBIAS
RL
(1) Zener rated for op amp supply capability (that is, 5.1V for OPA379).
(2) Current-limiting resistor.
(3) Choose zener biasing resistor or dual NMOSMETs (FDG6301N, NTJD4001N, or Si1034).
Figure 28. High-Side Current Monitor
RG
R1
R2
R2
R1
VREF
VOUT
1/2
OPA2379
1/2
OPA2379
V2
V1
R1 2R1
+
VOUT = (V1 - V2) 1 +
+ VREF
R2
RG
Figure 29. Two Op Amp Instrumentation Amplifier
Copyright © 2005–2008, Texas Instruments Incorporated
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Product Folder Link(s): OPA379 OPA2379 OPA4379
PACKAGE OPTION ADDENDUM
www.ti.com
11-Apr-2013
PACKAGING INFORMATION
Orderable Device
OPA2379AID
Status Package Type Package Pins Package
Eco Plan Lead/Ball Finish
MSL Peak Temp
Op Temp (°C)
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
Top-Side Markings
Samples
Drawing
Qty
(1)
(2)
(3)
(4)
ACTIVE
SOIC
SOT-23
SOT-23
SOT-23
SOT-23
SOIC
D
8
8
8
8
8
8
8
8
8
5
5
5
5
5
5
5
5
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-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
2379A
OPA2379AIDCNR
OPA2379AIDCNRG4
OPA2379AIDCNT
OPA2379AIDCNTG4
OPA2379AIDG4
OPA2379AIDR
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
DCN
DCN
DCN
DCN
D
3000
3000
250
Green (RoHS
& no Sb/Br)
BPK
Green (RoHS
& no Sb/Br)
BPK
Green (RoHS
& no Sb/Br)
BPK
250
Green (RoHS
& no Sb/Br)
BPK
75
Green (RoHS
& no Sb/Br)
2379A
2379A
2379A
SOIC
D
2500
2500
75
Green (RoHS
& no Sb/Br)
OPA2379AIDRG4
OPA379AID
SOIC
D
Green (RoHS
& no Sb/Br)
SOIC
D
Green (RoHS
& no Sb/Br)
OPA
379A
OPA379AIDBVR
OPA379AIDBVRG4
OPA379AIDBVT
OPA379AIDBVTG4
OPA379AIDCKR
OPA379AIDCKRG4
OPA379AIDCKT
OPA379AIDCKTG4
SOT-23
SOT-23
SOT-23
SOT-23
SC70
DBV
DBV
DBV
DBV
DCK
DCK
DCK
DCK
3000
3000
250
Green (RoHS
& no Sb/Br)
B53
B53
B53
B53
B54
B54
B54
B54
Green (RoHS
& no Sb/Br)
Green (RoHS
& no Sb/Br)
250
Green (RoHS
& no Sb/Br)
3000
3000
250
Green (RoHS
& no Sb/Br)
SC70
Green (RoHS
& no Sb/Br)
SC70
Green (RoHS
& no Sb/Br)
SC70
250
Green (RoHS
& no Sb/Br)
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
11-Apr-2013
Orderable Device
Status Package Type Package Pins Package
Eco Plan Lead/Ball Finish
MSL Peak Temp
Op Temp (°C)
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
Top-Side Markings
Samples
Drawing
Qty
(1)
(2)
(3)
(4)
OPA379AIDG4
OPA379AIDR
ACTIVE
SOIC
SOIC
D
8
8
75
Green (RoHS
& no Sb/Br)
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
OPA
379A
ACTIVE
ACTIVE
ACTIVE
ACTIVE
D
D
2500
2500
2000
2000
Green (RoHS
& no Sb/Br)
OPA
379A
OPA379AIDRG4
OPA4379AIPWR
OPA4379AIPWRG4
SOIC
8
Green (RoHS
& no Sb/Br)
OPA
379A
TSSOP
TSSOP
PW
PW
14
14
Green (RoHS
& no Sb/Br)
4379A
Green (RoHS
& no Sb/Br)
4379A
(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)
Multiple Top-Side Markings will be inside parentheses. Only one Top-Side 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 Top-Side Marking for that 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.
Addendum-Page 2
PACKAGE OPTION ADDENDUM
www.ti.com
11-Apr-2013
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 3
PACKAGE MATERIALS INFORMATION
www.ti.com
21-Oct-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)
OPA2379AIDCNR
OPA2379AIDCNR
OPA2379AIDCNT
OPA2379AIDCNT
OPA2379AIDR
SOT-23
SOT-23
SOT-23
SOT-23
SOIC
DCN
DCN
DCN
DCN
D
8
8
3000
3000
250
180.0
179.0
179.0
180.0
330.0
178.0
178.0
179.0
179.0
330.0
330.0
8.4
8.4
3.2
3.2
3.2
3.2
6.4
3.23
3.23
2.2
2.2
6.4
6.9
3.1
3.2
3.2
3.1
5.2
3.17
3.17
2.5
2.5
5.2
5.6
1.39
1.4
4.0
4.0
4.0
4.0
8.0
4.0
4.0
4.0
4.0
8.0
8.0
8.0
8.0
Q3
Q3
Q3
Q3
Q1
Q3
Q3
Q3
Q3
Q1
Q1
8
8.4
1.4
8.0
8
250
8.4
1.39
2.1
8.0
8
2500
3000
250
12.4
9.0
12.0
8.0
OPA379AIDBVR
OPA379AIDBVT
OPA379AIDCKR
OPA379AIDCKT
OPA379AIDR
SOT-23
SOT-23
SC70
DBV
DBV
DCK
DCK
D
5
1.37
1.37
1.2
5
9.0
8.0
5
3000
250
8.4
8.0
SC70
5
8.4
1.2
8.0
SOIC
8
2500
2000
12.4
12.4
2.1
12.0
12.0
OPA4379AIPWR
TSSOP
PW
14
1.6
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
21-Oct-2013
*All dimensions are nominal
Device
Package Type Package Drawing Pins
SPQ
Length (mm) Width (mm) Height (mm)
OPA2379AIDCNR
OPA2379AIDCNR
OPA2379AIDCNT
OPA2379AIDCNT
OPA2379AIDR
SOT-23
SOT-23
SOT-23
SOT-23
SOIC
DCN
DCN
DCN
DCN
D
8
8
3000
3000
250
210.0
195.0
195.0
210.0
367.0
180.0
180.0
195.0
195.0
367.0
367.0
185.0
200.0
200.0
185.0
367.0
180.0
180.0
200.0
200.0
367.0
367.0
35.0
45.0
45.0
35.0
35.0
18.0
18.0
45.0
45.0
35.0
35.0
8
8
250
8
2500
3000
250
OPA379AIDBVR
OPA379AIDBVT
OPA379AIDCKR
OPA379AIDCKT
OPA379AIDR
SOT-23
SOT-23
SC70
DBV
DBV
DCK
DCK
D
5
5
5
3000
250
SC70
5
SOIC
8
2500
2000
OPA4379AIPWR
TSSOP
PW
14
Pack Materials-Page 2
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