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INA281 ACTIVE -4-V to 110-V, 1.3-MHz, high-precision current sense amplifier

This product offers improved accuracy, higher bandwidth and an extended common mode voltage range.

Product details

Common mode voltage (Max) (V) 80 Common mode voltage (Min) (V) -16 Input offset (+/-) (Max) (uV) 2000 Input offset drift (+/-) (Typ) (uV/C) 2.5 Gain (V/V) 100 Gain error (%) 1 Gain error drift (+/-) (Max) (ppm/°C) 100 CMRR (Min) (dB) 100 Bandwidth (kHz) 200 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
Common mode voltage (Max) (V) 80 Common mode voltage (Min) (V) -16 Input offset (+/-) (Max) (uV) 2000 Input offset drift (+/-) (Typ) (uV/C) 2.5 Gain (V/V) 100 Gain error (%) 1 Gain error drift (+/-) (Max) (ppm/°C) 100 CMRR (Min) (dB) 100 Bandwidth (kHz) 200 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
SOT-23 (DBV) 5 5 mm² 2.9 x 1.6
  • Wide Common-Mode Voltage:
    –16 V to +80 V
  • Low Error: 3.0% Over Temp (maximum)
  • Bandwidth: Up to 500 kHz
  • Three Transfer Functions Available: 20 V/V,
    50 V/V, and 100 V/V
  • Quiescent Current: 900 µA (maximum)
  • Complete Current Sense Solution
  • APPLICATIONS
    • Welding Equipment
    • Notebook Computers
    • Cell Phones
    • Telecom Equipment
    • Automotive
    • Power Management
    • Battery Chargers

All other trademarks are the property of their respective owners

  • Wide Common-Mode Voltage:
    –16 V to +80 V
  • Low Error: 3.0% Over Temp (maximum)
  • Bandwidth: Up to 500 kHz
  • Three Transfer Functions Available: 20 V/V,
    50 V/V, and 100 V/V
  • Quiescent Current: 900 µA (maximum)
  • Complete Current Sense Solution
  • APPLICATIONS
    • Welding Equipment
    • Notebook Computers
    • Cell Phones
    • Telecom Equipment
    • Automotive
    • Power Management
    • Battery Chargers

All other trademarks are the property of their respective owners

The INA193–INA198 family of current shunt monitors with voltage output can sense drops across shunts at common-mode voltages from –16 V to +80 V, independent of the INA19x supply voltage. They are available with three output voltage scales: 20 V/V, 50 V/V, and 100 V/V. The 500 kHz bandwidth simplifies use in current control loops. The INA193–INA195 devices provide identical functions but alternative pin configurations to the INA196–INA198 devices, respectively.

The INA193–INA198 devices operate from a single 2.7-V to 18-V supply, drawing a maximum of 900 µA of supply current. They are specified over the extended operating temperature range (–40°C to +125°C), and are offered in a space-saving SOT-23 package.

The INA193–INA198 family of current shunt monitors with voltage output can sense drops across shunts at common-mode voltages from –16 V to +80 V, independent of the INA19x supply voltage. They are available with three output voltage scales: 20 V/V, 50 V/V, and 100 V/V. The 500 kHz bandwidth simplifies use in current control loops. The INA193–INA195 devices provide identical functions but alternative pin configurations to the INA196–INA198 devices, respectively.

The INA193–INA198 devices operate from a single 2.7-V to 18-V supply, drawing a maximum of 900 µA of supply current. They are specified over the extended operating temperature range (–40°C to +125°C), and are offered in a space-saving SOT-23 package.

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Technical documentation

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Type Title Date
* Data sheet INA19x Current Shunt Monitor −16 V to +80 V Common-Mode Range datasheet (Rev. G) PDF | HTML 03 Jan 2015
Application note Using a PCB Copper Trace as a Current-Sense Shunt Resistor PDF | HTML 25 Jan 2022
Technical article Solving the multidecade current-measurement challenge in your 48-V BMS application 14 Jun 2021
Technical article How current-sense amplifiers monitor satellite health 08 Feb 2021
Technical article A key to accurate system thermal management: monitoring both current flow and temperature 04 Oct 2018
Technical article System trade-offs for high- and low-side current measurements 01 Jun 2017
Analog Design Journal Low-cost current-shunt monitor IC revives moving-coil meter design 18 Apr 2006

Design & development

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

Simulation model

INA195 PSpice Model (Rev. B)

SBOC056B.ZIP (39 KB) - PSpice Model
Simulation model

INA195 TINA-TI Reference Design (Rev. B)

SBOC166B.TSC (101 KB) - TINA-TI Reference Design
Simulation model

INA195 TINA-TI Spice Model (Rev. A)

SBOM227A.ZIP (5 KB) - TINA-TI Spice Model
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 (...)
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 (...)
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 (...)
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 (...)
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
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
SOT-23 (DBV) 5 View options

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