INA186 - Texas Instruments

INA186 Current-Sense Amplifier

The INA186 is a low-power, voltage-output, currentsense amplifier (also called a current-shunt monitor). This device is commonly used for overcurrent protection, precision current measurement for system optimization, or in closed-loop feedback circuits. The INA186 can sense drops across shunts at commonmode voltages from –0.2 V to +40 V, independent of the s.

Features

• Wide common-mode voltage range, VCM:
  –0.2 V to +40 V
• Low input bias currents, IIB: 500 pA (typical) (enables microamp current measurement)
• Low power:
  – Low supply voltage, VS: 1.7 V to 5.5 V
  – Low quiescent current, IQ: 48 µA (typical)
• Accuracy:
  – Common-mode rejection ratio: 120 dB (minimum)
  – Gain error, EG: ±1% (maximum)
  – Gain drift: 10 ppm/°C (maximum)
  – Offset voltage, VOS: ±50 μV (maximum)
  – Offset drift: 0.5 μV/°C (maximum)
• Bidirectional current sensing capability
• Gain options:
  – INA186A1: 25 V/V
  – INA186A2: 50 V/V
  – INA186A3: 100 V/V
  – INA186A4: 200 V/V
  – INA186A5: 500 V/V.