The Texas Instruments INA187-Q1 current sense amplifier is an AEC-Q100 qualified device that operates from -2V to 42V. This series of current sense amplifiers have a bidirectional 650kHz high-precision high and small signal bandwidth. The INA187-Q1 amplifier measures voltage drop on shunt resistors over a wide common-mode range independently of the supply voltage. The amplifiers are powered from a single voltage supply of 2.7V to 12V and consume 650μA of supply current. The INA187-Q1 amplifier is available in three gain options: 20V/V, 50V/V, and 100V/V. These amplifiers are rated for an operating temperature range of -40°C to 125°C and are available in a 6-pin SOT-23 package. The INA187-Q1 device is AEC-Q100 qualified for automotive applications. The INA187-Q1 amplifier is ideal for use in DC/DC converters, battery management systems (BMS), fuel cell control units, and smart junction boxes.

characteristic

  • AEC-Q100 compliant for automotive applications, TATemperature class 1 is -40°C to 125°C
  • Provide functional safety documentation to help design functional safety systems.
  • Wide common mode voltage:
    • Operating voltage range: -2V to 42V
    • Withstand voltage range: -12V to 48V
  • Works in both directions
  • High and small signal bandwidth: 650kHz (20V/V gain)
  • Conversion speed: 2.5V/μs
  • Step response settling time of 1%: 6.5μs
  • High CMRR: 120 dB
  • Drift Gain Error: ±0.25%, ±10ppm/°C (max)
  • Drift offset voltage: ±150μV, ±0.5μV/°C (max)
  • Operating supply voltage range: 2.7V to 12V
  • Operating current: 650μA
  • Available buffs:
    • INA187A1-Q1: 20V/V
    • INA187A2-Q1: 50V/V
    • INA187A3-Q1：100V/V
  • Package Options: SOT23-6 (DBV)

apply

  • DC/DC converter
  • Battery Management System (BMS)
  • Fuel cell control unit
  • Smart junction box

Block diagram

Block Diagram - Texas Instruments INA187-Q1 Current Sense Amplifier

Typical applications:

Application Diagram - Texas Instruments INA187-Q1 Current Sense Amplifier