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Product details

Parameters

Common mode voltage (Max) (V) 80 Common mode voltage (Min) (V) -16 Input offset (+/-) (Max) (uV) 2500 Input offset drift (+/-) (Typ) (uV/C) 2.5 Gain (V/V) 20 Gain error (%) 1 Gain error drift (+/-) (Max) (ppm/°C) 50 CMRR (Min) (dB) 100 Bandwidth (kHz) 130 Supply voltage (Max) (V) 18 Supply voltage (Min) (V) 2.7 Iq (Max) (mA) 0.95 Number of channels (#) 1 Comparators (#) 0 Features Low-side Capable Rating Catalog Operating temperature range (C) -40 to 125 open-in-new Find other Current sense amplifiers analog output

Package | Pins | Size

SOIC (D) 8 19 mm² 3.91 x 4.9 open-in-new Find other Current sense amplifiers analog output

Features

  • Wide Common-Mode Range: –16 V to +80 V
  • CMRR: 120 dB
  • Accuracy:
    ±0.5-mV Offset (typ)
    ±0.2% Gain Error (typ)
    2.5 µV/°C Offset Drift (typ)
    50 ppm/°C Gain Drift (max)
  • Bandwidth: Up to 130 kHz
  • Two Gain Options Available:
    14 V/V (INA270)
    20 V/V (INA271)
  • Quiescent Current: 700 µA (typ)
  • Power Supply: +2.7 V to +18 V
  • Provision for Filtering

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Description

The INA270 and INA271 family of voltage-output, current-sense amplifiers can sense drops across shunt resistors at common-mode voltages from –16 V to +80 V, independent of the supply voltage. The INA270 and INA271 pinouts readily enable filtering.

The INA270 and INA271 are available with two gain options: 14 V/V and 20 V/V. The 130-kHz bandwidth simplifies use in current-control loops.

The INA270 and INA271 operate from a single +2.7-V to +18-V supply, drawing 700 µA (typical) of supply current. The devices are specified over the extended operating temperature range of –40°C to +125°C and are offered in an SOIC-8 package.

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Technical documentation

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No results found. Please clear your search and try again. View all 5
Type Title Date
* Datasheet INA27x Voltage Output, Unidirectional Measurement Current-Shunt Monitor datasheet (Rev. E) Jan. 25, 2018
Technical articles A key to accurate system thermal management: monitoring both current flow and temperature Oct. 04, 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.

Design tools & simulation

SIMULATION MODELS Download
SBOC285B.TSC (176 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBOC286A.ZIP (37 KB) - Spice Model
SIMULATION MODELS Download
SBOM313A.ZIP (6 KB) - TINA-TI Spice Model
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

Reference designs

REFERENCE DESIGNS Download
Solar MPPT Charge Controller Reference Design
TIDA-00120 This design is a 20A Maximum Power Point Tracking (MPPT) solar charge controller created for solar panel inputs corresponding to 12V and 24V panels. The design is targeted for small and medium power solar charger solutions and is capable of operating with 12V/24V panels and 12V/24V batteries up to (...)
document-generic Schematic document-generic User guide
Design files
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 document-generic User guide
Design files
REFERENCE DESIGNS Download
Constant Input Current 400mA Cap Charger
PMP5585 — The PMP5585 is a 70V, 1.3mF capacitor charger that keeps the input current constant to 400mA. The input voltage range is 6V to 15V.
Design files

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options

Ordering & quality

Support & training

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Videos

Over Current Sensing Techniques

Watch this webinar recording to learn more about the over-current protection (OCP). This webinar was brought to you in cooperation with Farnell element 14. 

Posted: 19-Jan-2016
Duration: 07:00

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