1 Features

• 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: 20V/V

– INA187A2: 50V/V

– INA187A3: 100V/V

• Package options: SOT23-6 (DBV)

2 Applications

• Motor drives

• Solenoids and actuators

• Injection molding machine

• Cordless power tools

3 Description

The INA187 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 highprecision

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 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 operates from a single 2.7V to 12V

supply, drawing 650μA of supply current. The INA187

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 is specified over operating temperature

range of −40°C to +125°C and is offered in a 6-pin

SOT-23 package.