INAx181 Bidirectional, Low- and High-Side Voltage Output, Current-Sense Amplifier (Rev. A)
SBOS793A – April2017 – revisedAugust 2017
UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.
- Common-Mode Range (VCM): –0.2 V to +26 V
- High Bandwidth: 350 kHz
- Offset Voltage:
- ±150 µV (Max) at VCM = 0 V
- ±500 µV (Max) at VCM = 12 V
- Output Slew Rate: 2 V/µs
- Bidirectional Current-Sensing Capability
- ±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 per Channel)
- Motor Control
- Battery Monitoring
- Power Management
- Lighting Control
- Overcurrent Detection
- Solar Inverters
The INA181 and INA2181 (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.
Both the INA181 and INA2181 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 520 µA.
The INA181 is available in a 6-pin, SOT-23 package, and the INA2181 is available in an 10-pin VSSOP package. All device options are specified over the extended operating temperature range of –40°C to +125°C.
|PART NUMBER||PACKAGE||BODY SIZE (NOM)|
|INA181||SOT-23 (6)||2.90 mm × 1.60 mm|
|INA2181(2)||VSSOP (10)||3.00 mm × 3.00 mm|
- For all available packages, see the package option addendum at the end of the datasheet.
- INA2181 is preview device.
Typical Application Circuit
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