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Analog current-sense amplifiers

INA271

ACTIVE

-16 to 80V, split-stage current sense amplifier w/ in-line filter capability

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Data sheet

INA271

ACTIVE
Data sheet Order now

Product details

Product type Analog output Common-mode voltage (max) (V) 80 Common-mode voltage (min) (V) -16 Input offset (±) (max) (µV) 2500 Input offset drift (±) (typ) (µV/°C) 2.5 Voltage gain (V/V) 20 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 Gain error (%) 1 Gain error drift (±) (max) (ppm/°C) 50 Slew rate (V/µs) 1 Features Low-side Capable Rating Catalog Operating temperature range (°C) -40 to 125
Product type Analog output Common-mode voltage (max) (V) 80 Common-mode voltage (min) (V) -16 Input offset (±) (max) (µV) 2500 Input offset drift (±) (typ) (µV/°C) 2.5 Voltage gain (V/V) 20 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 Gain error (%) 1 Gain error drift (±) (max) (ppm/°C) 50 Slew rate (V/µs) 1 Features Low-side Capable Rating Catalog Operating temperature range (°C) -40 to 125
SOIC (D) 8 29.4 mm² 4.9 x 6
  • 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
  • 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

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.

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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Type Title Date
* Data sheet INA27x Voltage Output, Unidirectional Measurement Current-Shunt Monitor datasheet (Rev. E) PDF | HTML 25 Jan 2018
Application note Using a PCB Copper Trace as a Current-Sense Shunt Resistor PDF | HTML 25 Jan 2022

Design & development

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

Simulation model

INA271 Generic Spice Model Listing (Rev. A)

SBOC286A.ZIP (37 KB) - Spice Model
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Simulation model

INA271 PSpice Model

SBOMBC2.ZIP (57 KB) - PSpice Model
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Simulation model

INA271 TINA-TI Reference Design (Rev. B)

SBOC285B.TSC (176 KB) - TINA-TI Reference Design
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Simulation model

INA271 TINA-TI Spice Model (Rev. A)

SBOM313A.ZIP (6 KB) - TINA-TI Spice Model
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Calculation tool

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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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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Reference designs

TIDA-00120 — Solar MPPT Charge Controller Reference Design

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 (...)
Test report: PDF
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Reference designs

TIDA-00302 — Current Shunt Monitor with Transient Robustness Reference Design

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 (...)

Design guide: PDF
Schematic: PDF
Package Pins Download
SOIC (D) 8 View options
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Ordering & quality

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