1 Features
• AEC-Q100 qualified for automotive applications:
– Temperature grade 1: –40°C to +125°C, TA
• Functional Safety-Capable
– Documentation available to aid functional safety
system design
• Wide common-mode voltage range, VCM:
–0.2 V to +40 V with survivability up to 42
V (recommended for automotive 12-V battery
applications)
• Low input bias currents, IIB: 500 pA (typical)
• 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-Q1: 25 V/V
– INA186A2-Q1: 50 V/V
– INA186A3-Q1: 100 V/V
– INA186A4-Q1: 200 V/V
– INA186A5-Q1: 500 V/V

2 Applications
• Body control module (BCM)
• Telematics control unit
• Emergency call (eCall)
• 12-V battery management system (BMS)
• Automotive head unit

3 Description
The INA186-Q1 is an automotive, low-power, voltageoutput,
current-sense amplifier (also called a currentshunt
monitor). This device is commonly used
for monitoring systems directly connected to an
automotive 12-V battery. The INA186-Q1 can sense
drops across shunts at common-mode voltages from
–0.2 V to +40 V, independent of the supply voltage.
In addition, the input pins have an absolute maximum
voltage of 42V.
The low input bias current of the INA186-Q1
permits the use of larger current-sense resistors,
thus providing accurate current measurements in the
microamp range. The low offset voltage of the zerodrift
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-Q1 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 (5), and SOT-23 (8) packages. The SC70
and SOT-23 (DDF) packages supports bidirectional
current measurement, whereas the SOT-23 (DBV)
only supports current measurement in one direction.