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INA187
  • INA187
  • INA187

INA187

ACTIVE

-2V to 40V, bidirectional 650 kHz precise current-sense amplifier

Texas Instruments INA187 Product Info

1 April 2026 4

Parameters

Product type

Analog output

Common-mode voltage (max) (V)

42

Common-mode voltage (min) (V)

-2

Input offset (±) (max) (µV)

150

Features

Bidirectional, High precision, Low-side Capable

Rating

Catalog

Voltage gain (V/V)

20, 50, 100

CMRR (min) (dB)

110

Bandwidth (kHz)

230, 450, 650

Supply voltage (max) (V)

12

Supply voltage (min) (V)

2.7

Iq (max) (mA)

0.6

Number of channels

1

Comparators (#)

0

Gain error (%)

0.15

Gain error drift (±) (max) (ppm/°C)

10

Slew rate (V/µs)

2.5

Operating temperature range (°C)

-40 to 125

Package

SOT-23 (DBV)-6-8.12 mm² 2.9 x 2.8

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)
  • 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)

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 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 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.

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