NEW

INA280

ACTIVE

2.7-V to 120-V, 1.1-MHz, high precision current sense amplifier in small (SC-70) package

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Product details

Parameters

Common mode voltage (Max) (V) 120 Common mode voltage (Min) (V) 2.7 Input offset (+/-) (Max) (uV) 150 Input offset drift (+/-) (Typ) (uV/C) 1 Gain (V/V) 100, 20, 200, 50, 500 Gain error (%) 0.5 Gain error drift (+/-) (Max) (ppm/°C) 20 CMRR (Min) (dB) 120 Bandwidth (kHz) 1100 Supply voltage (Max) (V) 20 Supply voltage (Min) (V) 2.7 Iq (Max) (mA) 0.6 Comparators (#) 0 Rating Catalog 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

  • Wide common-mode voltage:
    • Operational voltage: 2.7 V to 120 V
    • Survival voltage: −20 V to +122 V
  • Excellent CMRR:
    • 120-dB DC (Minimum)
    • 85-dB AC at 50 kHz
  • Accuracy
    • Gain:
      • Gain error: ±0.5% (maximum)
      • Gain drift: ±20 ppm/°C (maximum)
    • Offset:
      • Offset voltage: ±150 µV (maximum)
      • Offset drift: ±1 µV/°C (maximum)
  • Available gains:
    • INA280A1: 20 V/V
    • INA280A2: 50 V/V
    • INA280A3: 100 V/V
    • INA280A4: 200 V/V
    • INA280A5: 500 V/V
  • High bandwidth: 1.1 MHz
  • Slew rate: 2 V/µs
  • Quiescent current: 370 µA

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Description

The INA280 is a current sense amplifier that can measure voltage drops across shunt resistors over a wide common-mode range from 2.7 V to 120 V. It is in a highly space-efficient SC-70 package with a PCB footprint of only 2.0 mm × 2.1 mm. The current measurement accuracy is achieved thanks to the combination of an ultra-low offset voltage of ±150 µV (maximum), a small gain error of ±0.5% (maximum), and a high DC CMRR of 140 dB (typical). The INA280 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 1.1 MHz (at gain of 20 V/V) and an 85-dB AC CMRR (at 50 kHz).

The INA280 operates from a single 2.7-V to 20-V supply and draws a 370-µA supply current (typical). The INA280 available with five gain options: 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V. The low offset and drift of the INA280 enables accurate current sensing over the extended operating temperature range of −40°C to +125°C.

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Technical documentation

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Type Title Date
* Datasheet INA280 2.7-V to 120-V, 1.1-MHz, High Precision Current Sense Amplifier datasheet Oct. 15, 2020
Application note Current Sensing in a Programmable Logic Controller (PLC) (Rev. A) Dec. 04, 2020
User guide INA280EVM User's Guide Oct. 29, 2020
Technical articles A key to accurate system thermal management: monitoring both current flow and temperature Oct. 04, 2018
Application note 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
Application note High-Side Motor Current Monitoring for Over-Current Protection (Rev. A) Dec. 01, 2016
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 BOARD Download
25
Description

The INA280 evaluation module (EVM) is a small module with five completely independent boards that can be broken off by the designer. Five schematically identical boards are available for each of the five gain variations of the INA280 with inputs up to 120-V common-mode and 5-A (on-board shunt) input (...)

Features
  • Easy to test INA280 with differential voltage or shunt resistor
  • Pads and sockets allow quick and easy implementation of SMD filtering
  • Breakable panels enable designers to experiment and test with all gain variants

Design tools & simulation

SIMULATION TOOL 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 TOOL 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 (...)
CALCULATION TOOL Download
SBOR020A.ZIP (525 KB)

Reference designs

REFERENCE DESIGNS Download
Current Shunt Monitor with Transient Robustness Reference Design
TIDA-00302 This high-side current shunt monitor is used to measure the voltage developed across a current-sensing resistor when current passes through it.

Additionally, an external protection circuit is implemented to provide surge and fast-transient protection and demonstrate the different immunity levels to (...)

document-generic Schematic
Design files

CAD/CAE symbols

Package Pins Download
SC70 (DCK) 5 View options

Ordering & quality

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  • Qualification summary
  • Ongoing reliability monitoring

Support & training

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