INA2181 Series

26V, dual channel, bi-directional, 350kHz current sense amplifier

Link to Manufacturer Page: https://www.ti.com/

Catalog

26V, dual channel, bi-directional, 350kHz current sense amplifier

Part	Supplier Device Package	Slew Rate	Voltage - Supply Span (Max) [Max]	Grade	Current - Supply	Voltage - Input Offset	-3db Bandwidth	Mounting Type	Number of Circuits	Voltage - Supply Span (Min) [Min]	Amplifier Type	Package / Case	Current - Input Bias	Qualification	Output Type	Operating Temperature [Min]	Operating Temperature [Max]	Gain Bandwidth Product
Texas Instruments INA2181A4IDSQR	10-WSON (2x2)	2 V/µs	5.5 V	Automotive	356 µA	100 çV	105 kHz	Surface Mount	2	2.7 V	Current Sense	10-WFDFN Exposed Pad	75 µA	AEC-Q100	Rail-to-Rail	-40 °C	125 °C
Texas Instruments INA2181A1IDGST	10-VSSOP	2 V/µs	5.5 V		356 µA	100 çV	350 kHz	Surface Mount	2	2.7 V	Current Sense	10-MSOP, 10-TFSOP	75 µA		Rail-to-Rail	-40 °C	125 °C
Texas Instruments INA2181A3IDGSR	10-VSSOP	2 V/µs	5.5 V		356 µA	100 çV	150 kHz	Surface Mount	2	2.7 V	Current Sense	10-MSOP, 10-TFSOP	75 µA		Rail-to-Rail	-40 °C	125 °C
Texas Instruments INA2181A3IDSQR	10-WSON (2x2)	2 V/µs	5.5 V	Automotive	356 µA	100 çV	150 kHz	Surface Mount	2	2.7 V	Current Sense	10-WFDFN Exposed Pad	75 µA	AEC-Q100	Rail-to-Rail	-40 °C	125 °C
Texas Instruments INA2181A3QDGSRQ1	10-VSSOP	2 V/µs	5.5 V	Automotive	356 µA	100 çV	150 kHz	Surface Mount	2	2.7 V	Current Sense	10-MSOP, 10-TFSOP	75 µA	AEC-Q100	Rail-to-Rail	-40 °C	125 °C	150 kHz
Texas Instruments INA2181A4IDGST	10-VSSOP	2 V/µs	5.5 V		356 µA	100 çV	105 kHz	Surface Mount	2	2.7 V	Current Sense	10-MSOP, 10-TFSOP	75 µA		Rail-to-Rail	-40 °C	125 °C
Texas Instruments INA2181A2QDGSRQ1	10-VSSOP	2 V/µs	5.5 V	Automotive	356 µA	100 çV	210 kHz	Surface Mount	2	2.7 V	Current Sense	10-MSOP, 10-TFSOP	75 µA	AEC-Q100	Rail-to-Rail	-40 °C	125 °C	210 kHz
Texas Instruments INA2181A4IDGSR	10-VSSOP	2 V/µs	5.5 V		356 µA	100 çV	105 kHz	Surface Mount	2	2.7 V	Current Sense	10-MSOP, 10-TFSOP	75 µA		Rail-to-Rail	-40 °C	125 °C
Texas Instruments INA2181A2IDGSR	10-VSSOP	2 V/µs	5.5 V		356 µA	100 çV	210 kHz	Surface Mount	2	2.7 V	Current Sense	10-MSOP, 10-TFSOP	75 µA		Rail-to-Rail	-40 °C	125 °C
Texas Instruments INA2181A1IDSQR	10-WSON (2x2)	2 V/µs	5.5 V	Automotive	356 µA	100 çV	350 kHz	Surface Mount	2	2.7 V	Current Sense	10-WFDFN Exposed Pad	75 µA	AEC-Q100	Rail-to-Rail	-40 °C	125 °C
Texas Instruments INA2181A1QDGSRQ1	10-VSSOP	2 V/µs	5.5 V	Automotive	356 µA	100 çV	350 kHz	Surface Mount	2	2.7 V	Current Sense	10-MSOP, 10-TFSOP	75 µA	AEC-Q100	Rail-to-Rail	-40 °C	125 °C	350 kHz
Texas Instruments INA2181A2IDGST	10-VSSOP	2 V/µs	5.5 V		356 µA	100 çV	210 kHz	Surface Mount	2	2.7 V	Current Sense	10-MSOP, 10-TFSOP	75 µA		Rail-to-Rail	-40 °C	125 °C
Texas Instruments INA2181A4QDGSRQ1	10-VSSOP	2 V/µs	5.5 V	Automotive	356 µA	100 çV	105 kHz	Surface Mount	2	2.7 V	Current Sense	10-MSOP, 10-TFSOP	75 µA	AEC-Q100	Rail-to-Rail	-40 °C	125 °C	105 kHz
Texas Instruments INA2181A1IDGSR	10-VSSOP	2 V/µs	5.5 V		356 µA	100 çV	350 kHz	Surface Mount	2	2.7 V	Current Sense	10-MSOP, 10-TFSOP	75 µA		Rail-to-Rail	-40 °C	125 °C

Key Features

• Common-mode range (V CM): –0.2 V to +26 VHigh bandwidth: 350 kHz (A1 devices)Offset voltage:±150 µV (maximum) at V CM = 0 V±500 µV (maximum) at V CM = 12 VOutput slew rate: 2 V/µsBidirectional current-sensing capabilityAccuracy:±1% gain error (maximum)1-µV/°C offset drift (maximum)Gain options:20 V/V (A1 devices)50 V/V (A2 devices)100 V/V (A3 devices)200 V/V (A4 devices)Quiescent current: 260 µA maximum (INA181)Common-mode range (V CM): –0.2 V to +26 VHigh bandwidth: 350 kHz (A1 devices)Offset voltage:±150 µV (maximum) at V CM = 0 V±500 µV (maximum) at V CM = 12 VOutput slew rate: 2 V/µsBidirectional current-sensing capabilityAccuracy:±1% gain error (maximum)1-µV/°C offset drift (maximum)Gain options:20 V/V (A1 devices)50 V/V (A2 devices)100 V/V (A3 devices)200 V/V (A4 devices)Quiescent current: 260 µA maximum (INA181)

Description

The INA181, INA2181, and INA4181 (INAx181) current sense amplifiers are designed for cost-optimized applications. These devices are part of a family of bidirectional, current-sense amplifiers (also called current-shunt monitors) that sense voltage drops across current-sense resistors at common-mode voltages from –0.2 V to +26 V, independent of the supply voltage. The INAx181 family integrates a matched resistor gain network in four, fixed-gain device options: 20 V/V, 50 V/V, 100 V/V, or 200 V/V. This matched gain resistor network minimizes gain error and reduces the temperature drift. These devices operate from a single 2.7-V to 5.5-V power supply. The single-channel INA181 draws a maximum supply current of 260 µA; whereas, the dual-channel INA2181 draws a maximum supply current of 500 µA, and the quad-channel INA4181 draws a maximum supply current of 900 µA. The INA181 is available in both the 6-pin, SOT-23 and SC70 packages. The INA2181 is available in 10-pin, VSSOP and WSON packages. The INA4181 is available in a 20-pin, TSSOP package. All device options are specified over the extended operating temperature range of –40°C to +125°C. The INA181, INA2181, and INA4181 (INAx181) current sense amplifiers are designed for cost-optimized applications. These devices are part of a family of bidirectional, current-sense amplifiers (also called current-shunt monitors) that sense voltage drops across current-sense resistors at common-mode voltages from –0.2 V to +26 V, independent of the supply voltage. The INAx181 family integrates a matched resistor gain network in four, fixed-gain device options: 20 V/V, 50 V/V, 100 V/V, or 200 V/V. This matched gain resistor network minimizes gain error and reduces the temperature drift. These devices operate from a single 2.7-V to 5.5-V power supply. The single-channel INA181 draws a maximum supply current of 260 µA; whereas, the dual-channel INA2181 draws a maximum supply current of 500 µA, and the quad-channel INA4181 draws a maximum supply current of 900 µA. The INA181 is available in both the 6-pin, SOT-23 and SC70 packages. The INA2181 is available in 10-pin, VSSOP and WSON packages. The INA4181 is available in a 20-pin, TSSOP package. All device options are specified over the extended operating temperature range of –40°C to +125°C.