The INA180, INA2180,and INA4180 (INAx180) currentsense amplifiers are designed for cost-optimized applications. These devices are part of a familyof current-sense amplifiers (also called current-shunt monitors) that sense voltage drops acrosscurrent-sense resistors at common-mode voltages from –0.2 V to +26 V, independent of the supplyvoltage. The INAx180 integrate a matched resistor gain network infour, fixed-gain device options: 20 V/V, 50 V/V, 100 V/V, or 200 V/V. This matched gain resistornetwork minimizes gain error and reduces the temperature drift.
All these devices operate from a single 2.7-V to 5.5-V power supply. The single-channelINA180A3IDBVT draws a maximum supply current of 260 μA; whereas, thedual-channel INA2180 draws a maximum supply current of 500 μA, andthe quad channel draws a maximum supply current of 900 μA.
The INA180A3IDBVT is available in a 5-pin, SOT-23 package withtwo different pin configurations. The INA2180 is available in an8-pin, VSSOP package. The INA4180 is available in a 14-pin, TSSOPpackage. All device options are specified over the extended operating temperature range of –40°C to+125°C.
Feature
- Common-mode range (VCM): –0.2 Vto +26 V
- High bandwidth: 350 kHz (A1 devices)
- Offset voltage:
- ±150 μV (max) at VCM = 0 V
- ±500 μV (max) at VCM = 12 V
- Output slew rate: 2 V/μs
- Accuracy:
- ±1% gain error (max)
- 1-μV/°C offset drift (max)
- 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 (INA180)
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