Product
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INA185-Q1
  • INA185-Q1
  • INA185-Q1
  • INA185-Q1

INA185-Q1

ACTIVE

AEC-Q100, 26-V, 350-kHz, bi-directional, high-precision current sense amplifier

Texas Instruments INA185-Q1 Product Info

1 April 2026 3

Parameters

Product type

Analog output

Common-mode voltage (max) (V)

26

Common-mode voltage (min) (V)

-0.2

Input offset (±) (max) (µV)

55, 135

Input offset drift (±) (typ) (µV/°C)

0.2

Features

Bidirectional, High precision, Low-side Capable

Rating

Automotive

Voltage gain (V/V)

20, 50, 100, 200

CMRR (min) (dB)

86, 96, 106

Bandwidth (kHz)

105, 150, 210, 350

Supply voltage (max) (V)

5.5

Supply voltage (min) (V)

2.7

Iq (max) (mA)

0.3

Number of channels

1

Comparators (#)

0

Gain error (%)

0.12, 0.17

Gain error drift (±) (max) (ppm/°C)

8

Slew rate (V/µs)

2

TI functional safety category

Functional Safety-Capable

Operating temperature range (°C)

-40 to 125

Package

SOT-SC70 (DCK)-6-4.2 mm² 2 x 2.1

Features

  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C ≤ TA ≤ 125°C
    • HBM ESD classification level 2
    • CDM ESD classification level C6
  • Functional Safety-Capable
  • Common-mode range (VCM): –0.2V to 26V
  • High bandwidth: 350kHz (A1 devices)
  • Offset voltage:
    • ±55µV (maximum) at VCM = 0V
    • ±100µV (maximum) at VCM = 12V (A4 device)
  • Output slew rate: 2V/µs
  • Bidirectional current-sensing capability
  • Accuracy:
    • Maximum gain error (A1, A2, A3): ±0.2%
    • Maximum offset drift: 0.5µV/°C
  • Gain options:
    • 20V/V (A1 devices)
    • 50V/V (A2 devices)
    • 100V/V (A3 devices)
    • 200V/V (A4 devices)
  • Quiescent current: 260µA (maximum)
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C ≤ TA ≤ 125°C
    • HBM ESD classification level 2
    • CDM ESD classification level C6
  • Functional Safety-Capable
  • Common-mode range (VCM): –0.2V to 26V
  • High bandwidth: 350kHz (A1 devices)
  • Offset voltage:
    • ±55µV (maximum) at VCM = 0V
    • ±100µV (maximum) at VCM = 12V (A4 device)
  • Output slew rate: 2V/µs
  • Bidirectional current-sensing capability
  • Accuracy:
    • Maximum gain error (A1, A2, A3): ±0.2%
    • Maximum offset drift: 0.5µV/°C
  • Gain options:
    • 20V/V (A1 devices)
    • 50V/V (A2 devices)
    • 100V/V (A3 devices)
    • 200V/V (A4 devices)
  • Quiescent current: 260µA (maximum)

Description

The INA185-Q1 current sense amplifier is designed for use in cost-sensitive space constrained applications. This device is a bidirectional, current-sense amplifier (also called a current-shunt monitor) that senses the voltage drop across a current-sense resistor at common-mode voltages from –0.2V to 26V, independent of the supply voltage. The INA185-Q1 integrates a matched resistor gain network in four, fixed-gain device options: 20V/V, 50V/V, 100V/V, or 200V/V. This matched gain resistor network minimizes gain error and reduces the temperature drift.

The INA185-Q1 operates from a single 2.7V to 5.5V power supply. The device draws a maximum supply current of 260µA and features high slew rate and bandwidth making this device an excellent choice for many power-supply and motor-control applications.

The INA185-Q1 is available in an industry standard SC70 package. The device is specified over the extended operating temperature range of –40°C to 125°C.

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