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Texas Instruments INA187-Q1 Current Sense Amplifiers

Texas Instruments INA187-Q1 Current Sense Amplifiers are AEC-Q100 qualified devices with an operational voltage range of -2V to 42V. These current sense amplifiers feature bidirectional 650kHz high-precision high small signal bandwidth. The INA187-Q1 amplifiers can measure voltage drops across shunt resistors over a wide common-mode range, independent of the supply voltage. These amplifiers operate from a single 2.7V to 12V voltage supply, drawing 650µA of supply current. The INA187-Q1 amplifiers are available in three gain options: 20V/V, 50V/V, and 100V/V. These amplifiers are specified over an operating temperature range of -40°C to 125°C and is offered in a 6-pin SOT-23 package. The INA187-Q1 devices are AEC-Q100 qualified for automotive applications. The INA187-Q1 amplifiers are ideal for DC/DC converters, Battery Management Systems (BMS), fuel cell control units, and smart junction boxes.

Features

  • AEC-Q100 qualified for automotive applications with -40°C to 125°C, TA temperature grade 1
  • Functional safety-capable documentation is available to aid in functional safety system design
  • Wide common-mode voltage:
    • -2V to 42V operational voltage range
    • -12V to 48V survival voltage range
  • Bidirectional operation
  • 650kHz (20V/V gain) high small signal bandwidth
  • 2.5V/µs slew rate
  • 6.5µs step response settling time to 1%
  • 120dB high CMRR
  • ±0.25%, ±10ppm/°C drift gain error (maximum)
  • ±150µV, ±0.5µV/°C drift offset voltage (maximum)
  • Operates from a 2.7V to 12V supply voltage range
  • 650μA operational current
  • Available gains:
    • INA187A1-Q1: 20V/V
    • INA187A2-Q1: 50V/V
    • INA187A3-Q1: 100V/V
  • SOT23-6 (DBV) package option

Applications

  • DC/DC converters
  • Battery Management Systems (BMS)
  • Fuel cell control units
  • Smart junction boxes

Block Diagram

Block Diagram - Texas Instruments INA187-Q1 Current Sense Amplifiers

Typical Application

Application Circuit Diagram - Texas Instruments INA187-Q1 Current Sense Amplifiers

Related Current Sense Amplifiers

Texas Instruments INA187 High-Precision Current Sense Amplifier

Can measure voltage drops across shunt resistors over a wide common-mode range from –2V to 42V.

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Published: 2025-11-04 | Updated: 2025-11-10