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INA185-Q1

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

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Data sheet

INA185-Q1

ACTIVE
Data sheet Order now

Product details

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 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
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 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
SOT-SC70 (DCK) 6 4.2 mm² (2 mm × 2.1 mm)
  • 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)

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.

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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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet INA185-Q1 AEC-Q100, 26V, 350kHz, Bidirectional, High-Precision Current Sense Amplifier datasheet PDF | HTML Feb 23, 2024
Application note Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML Nov 18, 2024
Functional safety information INAx18x-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. B) PDF | HTML Oct 30, 2023

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Evaluation board

INA185EVM — INA185 current sensing evaluation module

The INA185 is a current sense monitor solution that provides ease of use and high performance in a small package.  The INA185EVM is intended to provide basic functional evaluation of the device family. The fixture layout is not intended as a model for the target circuit, nor it is laid out (...)
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ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)

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CS-AMPLIFIER-ERROR-TOOL — Current Sense Amplifier Comparison and Error Tool

This Excel calculator provides a comparison between two and five of our standard current sense amplifiers, delivering a chart containing the basic parameters of each device. This calculator also takes system condition inputs from users such as common-mode voltage, supply voltage, shunt resistor (...)
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SOT-SC70 (DCK) 6 Ultra Librarian
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