INA181 Texas instruments

INA181

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INA181

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Описание

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 a 6-pin, SOT-23 package. 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.

Common-mode range (V_CM): –0.2 V to +26 V
High bandwidth: 350 kHz (A1 devices)
Offset voltage:
- ±150 µV (maximum) at V_CM = 0 V
- ±500 µV (maximum) at V_CM = 12 V
Output slew rate: 2 V/µs
Bidirectional current-sensing capability
Accuracy:
- ±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)

Product type	Analog output
Common-mode voltage (max) (V)	26
Common-mode voltage (min) (V)	-0.2
Input offset (±) (max) (µV)	150
Input offset drift (±) (typ) (µV/°C)	0.2
Voltage gain (V/V)	20, 50, 100, 200
CMRR (min) (dB)	84
Bandwidth (kHz)	105, 150, 210, 350
Supply voltage (max) (V)	5.5
Supply voltage (min) (V)	2.7
Iq (max) (mA)	0.3
Number of channels	1
Comparators (#)	0
Gain error (%)	1
Gain error drift (±) (max) (ppm/°C)	20
Slew rate (V/µs)	2
Features	Bi-directional, Low-side Capable
Rating	Catalog
Operating temperature range (°C)	-40 to 125