1 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

2 Applications
• Standard notebook PC
• Smartphone
• Consumer battery charger
• Baseband unit (BBU)
• Merchant network and server PSU
• Battery test

3 Description
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 supply voltage.
The low input bias current of the INA186 permits the
use of larger current-sense resistors, thus providing
accurate current measurements in the microamp
range. The low offset voltage of the zero-drift
architecture extends the dynamic range of the current
measurement. This feature allows for smaller sense
resistors with lower power loss, while still providing
accurate current measurements.
The INA186 operates from a single 1.7-V to 5.5-V
power supply, and draws a maximum of 90 μA of
supply current . Five fixed gain options are available:
25 V/V, 50 V/V, 100 V/V, 200 V/V, or 500 V/V. The
device is specified over the operating temperature
range of –40°C to +125°C, and offered in SC70,
SOT-23-THIN, and DSBGA packages. The SC70 and
SOT-23 (DDF) packages support bidirectional current
measurement, whereas the DSBGA package only
supports current measurement in one direction.