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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 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 Features Bidirectional, High precision, Low-side Capable Rating Automotive 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 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 Features Bidirectional, High precision, Low-side Capable Rating Automotive TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125
SOT-SC70 (DCK) 6 4.2 mm² 2 x 2.1
  • 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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* Data sheet INA185-Q1 AEC-Q100, 26V, 350kHz, Bidirectional, High-Precision Current Sense Amplifier datasheet PDF | HTML 23 Feb 2024
Functional safety information INAx18x-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. B) PDF | HTML 30 Oct 2023

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

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 (...)
User guide: PDF
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Design tool

CIRCUIT060035 — Bidirectional current sensing with a window comparator circuit

This bidirectional current sensing solution uses a current-sense amplifier and a high-speed dual comparator with a rail-to-rail input common mode range to create over-current (OC) alert signals at the comparator outputs (OUTA and OUTB) if the input current (IG1) rises above 100 A or falls below (...)
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Design tool

CIRCUIT060037 — Precision over-current latch circuit

This high-side, current sensing solution uses a current sense amplifier, a comparator with an integrated reference and a P-channel MOSFET to create an over-current latch circuit. When a load current greater than 200 mA is detected, the circuit disconnects the system from its power source. The (...)
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
User guide: PDF
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