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:

– Operational voltage: −2V to +42V

– Survival voltage: −12V to +48V

• Bidirectional operation

• High small signal bandwidth: 650kHz (20V/V Gain)

• Slew rate: 2.5V/μs

• Step response settling time to 1%: 6.5μs

• High CMRR: 120dB

• Gain error (maximum) : ±0.25%, ±10ppm/°C drift

• Offset voltage (maximum): ±150μV, ±0.5μV/°C drift

• Operates from 2.7V to 12V supply

• Operational current: 650μA

• Available gains:

– INA187A1-Q1: 20V/V

– INA187A2-Q1: 50V/V

– INA187A3-Q1: 100V/V

• Package options: SOT23-6 (DBV)

2 Applications

• DC/DC converter

• Battery management systems (BMS)

• Fuel cell control unit

• Smart junction box

3 Description

The INA187-Q1 is a precise, bidirectional current

sense amplifier that can measure voltage drops

across shunt resistors over a wide common-mode

range from –2V to 42V, independent of the supply

voltage. The high-precision current measurement is

achieved through a combination of low offset voltage

(±150μV, maximum), small gain error (±0.25%,

maximum) and a high DC CMRR (typical 120dB).

The INA187-Q1 is not only designed for bidirectional

DC current measurements, but also for high-speed

applications (such as transient detection and fast

overcurrent protection) with a high signal bandwidth

of 650kHz and fast settling time.

The INA187-Q1 operates from a single 2.7V to 12V

supply, drawing 650μA of supply current. The INA187-

Q1 is available in three gain options: 20V/V, 50V/V,

100V/V. Multiple gain options allow for optimization

between available shunt resistor values and wide

output dynamic range requirements.

The INA187-Q1 is specified over operating

temperature range of −40°C to +125°C and is offered

in a 6-pin SOT-23 package.