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Current sense amplifiers analog output

INA169

ACTIVE

2.7 to 60V, 440kHz Variable gain current sense amplifier

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Data sheet

INA169

ACTIVE
Data sheet Order now

Product details

Product type Analog output Common-mode voltage (max) (V) 60 Common-mode voltage (min) (V) 2.7 Input offset (±) (max) (V) 0.001 Input offset drift (±) (typ) (V/°C) 0.000001 Voltage gain (V/V) Adjustable CMRR (min) (dB) 100 Bandwidth (MHz) 0.44 Supply voltage (max) (V) 60 Supply voltage (min) (V) 2.7 Iq (max) (mA) 0.125 Number of channels 1 Comparators (#) 0 Features Current Output Rating Catalog Operating temperature range (°C) -40 to 125
Product type Analog output Common-mode voltage (max) (V) 60 Common-mode voltage (min) (V) 2.7 Input offset (±) (max) (V) 0.001 Input offset drift (±) (typ) (V/°C) 0.000001 Voltage gain (V/V) Adjustable CMRR (min) (dB) 100 Bandwidth (MHz) 0.44 Supply voltage (max) (V) 60 Supply voltage (min) (V) 2.7 Iq (max) (mA) 0.125 Number of channels 1 Comparators (#) 0 Features Current Output Rating Catalog Operating temperature range (°C) -40 to 125
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8
  • Complete Unipolar High-Side Current Measurement Circuit
  • Wide Supply and Common-Mode Range
  • INA139: 2.7 V to 40 V
  • INA169: 2.7 V to 60 V
  • Independent Supply and Input Common-Mode Voltages
  • Single Resistor Gain Set
  • Low Quiescent Current: 60 µA (Typical)
  • 5-Pin, SOT-23 Packages
  • Complete Unipolar High-Side Current Measurement Circuit
  • Wide Supply and Common-Mode Range
  • INA139: 2.7 V to 40 V
  • INA169: 2.7 V to 60 V
  • Independent Supply and Input Common-Mode Voltages
  • Single Resistor Gain Set
  • Low Quiescent Current: 60 µA (Typical)
  • 5-Pin, SOT-23 Packages

The INA139 and INA169 are high-side, unipolar, current shunt monitors. Wide input common-mode voltage range, high-speed, low quiescent current, and tiny SOT-23 packaging enable use in a variety of applications.

Input common-mode and power-supply voltages are independent and can range from 2.7 V to 40 V for the INA139 and 2.7 V to 60 V for the INA169. Quiescent current is only 60 µA, which permits connecting the power supply to either side of the current measurement shunt with minimal error.

The device converts a differential input voltage to a current output. This current is converted back to a voltage with an external load resistor that sets any gain from 1 to over 100. Although designed for current shunt measurement, the circuit invites creative applications in measurement and level shifting.

Both the INA139 and INA169 are available in 5-pin SOT-23 packages. The INA139 device is specified for the –40°C to +125°C temperature range, and the INA169 is specified from –40°C to +85°C.

The INA139 and INA169 are high-side, unipolar, current shunt monitors. Wide input common-mode voltage range, high-speed, low quiescent current, and tiny SOT-23 packaging enable use in a variety of applications.

Input common-mode and power-supply voltages are independent and can range from 2.7 V to 40 V for the INA139 and 2.7 V to 60 V for the INA169. Quiescent current is only 60 µA, which permits connecting the power supply to either side of the current measurement shunt with minimal error.

The device converts a differential input voltage to a current output. This current is converted back to a voltage with an external load resistor that sets any gain from 1 to over 100. Although designed for current shunt measurement, the circuit invites creative applications in measurement and level shifting.

Both the INA139 and INA169 are available in 5-pin SOT-23 packages. The INA139 device is specified for the –40°C to +125°C temperature range, and the INA169 is specified from –40°C to +85°C.
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Pin-for-pin with same functionality to the compared device.
INA139 ACTIVE 2.7 to 36V, 440kHz Variable gain current sense amplifier The INA139 is functionally equivalent supporting up to 36 V
INA168 ACTIVE 2.7 to 60V, 800kHz Variable gain current sense amplifier The INA168 is functionally equivalent with lower bandwidth

Technical documentation

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Type Title Date
* Data sheet INA1x9 High-Side Measurement Current Shunt Monitor datasheet (Rev. F) PDF | HTML 27 Feb 2017
Application note Extending the Common-Mode Voltage Range of Current-Output Current Shunt Monitors (Rev. A) PDF | HTML 21 Mar 2022
Application note Extending Beyond the Max Common-Mode Range of Discrete Current-Sense Amplifiers (Rev. A) PDF | HTML 10 Mar 2022
Application note Safety and Protection for Discrete Digital Outputs in a PLC System Using Current (Rev. B) PDF | HTML 10 Mar 2022
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
Circuit design High-voltage, high-side floating current sensing circuit using current output, c 28 Jun 2018
Technical article System trade-offs for high- and low-side current measurements 01 Jun 2017
Application note Precision LED Brightness and Color Mixing With Discrete Current Sense Amplifiers 28 Feb 2017

Design & development

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

Simulation model

INA169 PSpice Model (Rev. B)

SBOC008B.ZIP (38 KB) - PSpice Model
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Simulation model

INA169 TINA-TI Reference Design (Rev. C)

SBOC162C.TSC (82 KB) - TINA-TI Reference Design
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Simulation model

INA169 TINA-TI Spice Model (Rev. B)

SBOM223B.ZIP (4 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-01081 — LED-Lighting Control Reference Design for Machine Vision

This LED lighting control reference design demonstrates a unique approach to drive and control a string of multiple high-power light-emitting diodes (LEDs). This reference design is targeted for industrial machine vision systems and is also suitable for other industrial or automotive lighting (...)
Design guide: PDF
Schematic: PDF
Reference designs

PMP9010 — Range boost converter reference design to drive two strings of automotive LEDs

This wide input voltage range boost operates from an input of 9V - 32V and regulates current in two strings of 13 LEDs. A second control loop monitors and regulates the input current during drop outs or faults. Discrete linear regulators at the bottom of each string control the individual string (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP8948 — Automotive Range Boost Converter Drives Two Strings of LEDs Reference Design

This wide input voltage range boost operates from an input of 9V - 32V and regulates current in two strings of 13 LEDs. Additionally, a second control loop monitors and regulates the input current during drop outs or faults. This low cost design operates at greater than 94% efficiency.
Test report: PDF
Package Pins Download
SOT-23 (DBV) 5 View options

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