运算放大芯片INA181A2IDBVT:

he INA181, INA2181, and INA4181 (INAx181) current sense amplifiers are designed for costoptimized 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 commonmode 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 an 10-pin, VSSOP package. 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.

 Features:
1. Common-mode range (VCM): –0.2 V to +26 V
2. High bandwidth: 350 kHz (A1 Devices)
3. Offset voltage: – ±150 μV (Max) at VCM = 0 V – ±500 μV (Max) at VCM = 12 V
4. Output slew rate: 2 V/μs
5. Bidirectional current-sensing capability
6. Accuracy: – ±1% gain error (max) – 1-μV/°C offset drift (max)
7. 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 max (INA181)

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