INA181A2IDBVT

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 an 10-pin VSSOP package, and 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.

Applications

• Motor Control
• Battery Monitoring
• Power Management
• Lighting Control
• Overcurrent Detection
• Solar Inverters

Key features

• Common-Mode Range (VCM): -0.2 V to +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
• Bidirectional Current-Sensing Capability
• Accuracy:
• ±1% Gain Error (Max)
• 1 ppm/°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 (INA181)