INA331 Series

Low-Power, Single Supply, CMOS, Instrumentation Amplifier

Catalog

Low-Power, Single Supply, CMOS, Instrumentation Amplifier

Part	Voltage - Supply Span (Max) [Max]	Current - Supply	Output Type	Current - Output / Channel	Amplifier Type	Voltage - Supply Span (Min) [Min]	Mounting Type	Current - Input Bias	Package / Case	Package / Case [custom]	Package / Case	Operating Temperature [Min]	Operating Temperature [Max]	Slew Rate	-3db Bandwidth	Voltage - Input Offset	Number of Circuits
Texas Instruments INA331AIDGKR	5.5 V	415 µA	Rail-to-Rail	48 mA	Instrumentation	2.5 V	Surface Mount	0.5 pA	8-MSOP 8-TSSOP	0.118 in	3 mm	-55 °C	125 °C	5 V/çs	2 MHz	250 çV	1
Texas Instruments INA331IDGKR	5.5 V	415 µA	Rail-to-Rail	48 mA	Instrumentation	2.5 V	Surface Mount	0.5 pA	8-MSOP 8-TSSOP	0.118 in	3 mm	-55 °C	125 °C	5 V/çs	2 MHz	250 çV	1
Texas Instruments INA331AIDGKT	5.5 V	415 µA	Rail-to-Rail	48 mA	Instrumentation	2.5 V	Surface Mount	0.5 pA	8-MSOP 8-TSSOP	0.118 in	3 mm	-55 °C	125 °C	5 V/çs	2 MHz	250 çV	1
Texas Instruments INA331AIDGKRG4	5.5 V	415 µA	Rail-to-Rail	48 mA	Instrumentation	2.5 V	Surface Mount	0.5 pA	8-MSOP 8-TSSOP	0.118 in	3 mm	-55 °C	125 °C	5 V/çs	2 MHz	250 çV	1
Texas Instruments INA331IDGKTG4	5.5 V	415 µA	Rail-to-Rail	48 mA	Instrumentation	2.5 V	Surface Mount	0.5 pA	8-MSOP 8-TSSOP	0.118 in	3 mm	-55 °C	125 °C	5 V/çs	2 MHz	250 çV	1
Texas Instruments INA331AIDGKTG4	5.5 V	415 µA	Rail-to-Rail	48 mA	Instrumentation	2.5 V	Surface Mount	0.5 pA	8-MSOP 8-TSSOP	0.118 in	3 mm	-55 °C	125 °C	5 V/çs	2 MHz	250 çV	1

Catalog

Low-Power, Single Supply, CMOS, Instrumentation Amplifier

Key Features

• DESIGNED FOR LOW COSTHIGH GAIN ACCURACY: G = 5, 0.02%, 2ppm/°CGAIN SET WITH EXT. RESISTORS FOR >5V/VLOW OFFSET VOLTAGE: ±250 µVHIGH CMRR: 94dB DC, 50dB at 45kHzLOW BIAS CURRENT: 0.5pABANDWIDTH, SLEW RATE: 2.0MHz, 5V/µsRAIL-TO-RAIL OUTPUT SWING: (V+)– 0.02VWIDE TEMPERATURE RANGE: –55°C to +125°CLOW QUIESCENT CURRENT: 490 µA max/chanSHUT DOWN: 0.01 µAMSOP-8 SINGLE AND TSSOP-14 DUAL PACKAGESAPPLICATIONSINDUSTRIAL SENSOR AMPLIFIERS:Bridge, RTD, Thermocouple, PositionPHYSIOLOGICAL AMPLIFIERS:ECG, EEG, EMGA/D CONVERTER SIGNAL CONDITIONINGDIFFERENTIAL LINE RECEIVERS WITH GAINFIELD UTILITY METERSPCMCIA CARDSAUDIO AMPLIFIERSCOMMUNICATION SYSTEMSTEST EQUIPMENTAUTOMOTIVE INSTRUMENTATIONAll trademarks are the property of their respective owners.DESIGNED FOR LOW COSTHIGH GAIN ACCURACY: G = 5, 0.02%, 2ppm/°CGAIN SET WITH EXT. RESISTORS FOR >5V/VLOW OFFSET VOLTAGE: ±250 µVHIGH CMRR: 94dB DC, 50dB at 45kHzLOW BIAS CURRENT: 0.5pABANDWIDTH, SLEW RATE: 2.0MHz, 5V/µsRAIL-TO-RAIL OUTPUT SWING: (V+)– 0.02VWIDE TEMPERATURE RANGE: –55°C to +125°CLOW QUIESCENT CURRENT: 490 µA max/chanSHUT DOWN: 0.01 µAMSOP-8 SINGLE AND TSSOP-14 DUAL PACKAGESAPPLICATIONSINDUSTRIAL SENSOR AMPLIFIERS:Bridge, RTD, Thermocouple, PositionPHYSIOLOGICAL AMPLIFIERS:ECG, EEG, EMGA/D CONVERTER SIGNAL CONDITIONINGDIFFERENTIAL LINE RECEIVERS WITH GAINFIELD UTILITY METERSPCMCIA CARDSAUDIO AMPLIFIERSCOMMUNICATION SYSTEMSTEST EQUIPMENTAUTOMOTIVE INSTRUMENTATIONAll trademarks are the property of their respective owners.

Description

The INA331 and INA2331 are rail-to-rail output, low-power CMOS instrumentation amplifiers that offer wide range, single-supply operation as well as bipolar-supply operation. The INA331 family provides low-cost, low-noise amplification of differential signals with a low quiescent current of 415µA (dropping to 0.01µA when shutdown). Returning to normal operation within microseconds, this INA can be used for battery or multi-channel applications. Configured internally in a gain of 5V/V, the INA331 offers flexibility in higher gains by choosing external resistors. The INA331 rejects line noise and its harmonics, because common-mode error remains low even at higher frequencies. High bandwidth and slew rate makes the INA331 ideal for directly driving sampling Analog-to-Digital (A/D) converters as well as general-purpose applications. With high precision, low cost, and small packages, the INA331 outperforms discrete designs. They are specified for a wide temperature range of -55°C to +125°C. The INA331 and INA2331 are rail-to-rail output, low-power CMOS instrumentation amplifiers that offer wide range, single-supply operation as well as bipolar-supply operation. The INA331 family provides low-cost, low-noise amplification of differential signals with a low quiescent current of 415µA (dropping to 0.01µA when shutdown). Returning to normal operation within microseconds, this INA can be used for battery or multi-channel applications. Configured internally in a gain of 5V/V, the INA331 offers flexibility in higher gains by choosing external resistors. The INA331 rejects line noise and its harmonics, because common-mode error remains low even at higher frequencies. High bandwidth and slew rate makes the INA331 ideal for directly driving sampling Analog-to-Digital (A/D) converters as well as general-purpose applications. With high precision, low cost, and small packages, the INA331 outperforms discrete designs. They are specified for a wide temperature range of -55°C to +125°C.