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Product details

Parameters

Common mode voltage (Max) (V) 120 Common mode voltage (Min) (V) 2.7 Input offset (+/-) (Max) (uV) 12 Input offset drift (+/-) (Typ) (uV/C) 0.2 Gain (V/V) 100, 20, 200, 50, 500 Gain error (%) 0.15 Gain error drift (+/-) (Max) (ppm/°C) 5 CMRR (Min) (dB) 140 Bandwidth (kHz) 1100 Supply voltage (Max) (V) 20 Supply voltage (Min) (V) 2.7 Iq (Max) (mA) 0.6 Number of channels (#) 1 Comparators (#) 0 Rating Automotive Operating temperature range (C) -40 to 125 open-in-new Find other Current sense amplifiers analog output

Package | Pins | Size

SOT-SC70 (DCK) 5 4 mm² 2 x 2.1 open-in-new Find other Current sense amplifiers analog output

Features

  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Wide common-mode voltage:
    • Operational voltage: 2.7 V to 110 V
    • Survival voltage: −20 V to +120 V
  • Excellent CMRR:
    • 160-dB DC
    • 85-dB AC at 50 kHz
  • Accuracy
    • Gain:
      • Gain error: 0.25% (maximum)
      • Gain drift: 10 ppm/°C (maximum)
    • Offset:
      • Offset voltage: ± 25 µV (maximum)
      • Offset drift: ±0.25 µV/°C (maximum)
  • Available gains:
    • INA290A1Q: 20 V/V
    • INA290A2Q: 50 V/V
    • INA290A3Q: 100 V/V
    • INA290A4Q: 200 V/V
    • INA290A5Q: 500 V/V
  • Bandwidth: 800 kHz
  • Slew rate: 2 V/µs
  • Quiescent current: 350 µA

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Description

The INA290-Q1 is an ultra-precise current sense amplifier than can measure voltage drops across shunt resistors over a wide common-mode range from 2.7 V to 110 V. It is in a highly space-efficient SC-70 package with a PCB footprint of only 2.00 mm × 1.25 mm. The ultra-precise current measurement accuracy is achieved thanks to the combination of an ultra-low offset voltage of 25 µV (maximum), a small gain error of 0.25% (maximum), and a high DC CMRR of 160 dB (typical). The INA290-Q1 is not only designed for DC current measurement, but also for high-speed applications (like fast overcurrent protection, for example) with a high bandwidth of 800 kHz (at gain of 20 V/V) and an 85-dB AC CMRR (at 50 kHz).

The INA290-Q1 operates from a single 2.7-V to 20-V supply and draws a 350-µA supply current (typical). The INA290-Q1 is available with five gain options: 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V. The low offset of the zero-drift architecture enables current sensing with low ohmic shunts as specified over the extended operating temperature range (−40°C to +125°C).

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Technical documentation

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Type Title Date
* Datasheet INA290-Q1 AEC-Q100, 2.7-V to 110-V, 800-kHz, Ultra-Precise Current-Sense Amplifier in Small (SC-70) Package datasheet Oct. 30, 2019
Application notes Improving Power Amplifier Efficiency with Current Monitors Dec. 20, 2019
User guides INA290EVM User's Guide Oct. 11, 2019
Technical articles A key to accurate system thermal management: monitoring both current flow and temperature Oct. 04, 2018
Application notes Current Sensing in an H-Bridge (Rev. A) Jul. 20, 2018
Technical articles System trade-offs for high- and low-side current measurements Jun. 01, 2017
Technical articles Why should you care about overcurrent protection in your system? Jun. 16, 2016
Technical articles How to get started with current sense amplifiers – part 2 May 26, 2015

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
25
Description
This is a small module with 5 completely independent boards that can be broken off by the user. Five schematically identical boards for each of the five gain variation of the INA290 with inputs up to 110V common mode and 5A (on board shunt) input capability. Each board provides test points for VS (...)
Features
  • Easy to test INA290 with differential voltage or shunt resistor.
  • Pads and sockets allow quick and easy implementation of SMD filtering.
  • Breakable panels lets customer experiment and test with all gain variants.

Design tools & simulation

SIMULATION MODELS Download
SBOMB25.TSC (138 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBOMB26.ZIP (38 KB) - TINA-TI Spice Model
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SIMULATION TOOLS Download
SPICE-based analog simulation program
TINA-TI 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 (...)
document-generic User guide

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Package Pins Download
SC70 (DCK) 5 View options

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