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Current sense amplifiers analog output

INA223

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26V, programmable-gain current sense amplifier & analog power monitor

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Data sheet

INA223

ACTIVE
Data sheet Order now

Product details

Common mode voltage (Max) (V) 26 Common mode voltage (Min) (V) 0 Input offset (+/-) (Max) (uV) 300 Input offset drift (+/-) (Typ) (uV/C) 0.6 Gain (V/V) 128, 20, 300 Gain error (%) 0.25, 0.5, 1 Gain error drift (+/-) (Max) (ppm/°C) 50 CMRR (Min) (dB) 100 Bandwidth (kHz) 25, 20, 10 Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 2.7 Iq (Max) (mA) 0.25 Number of channels (#) 1 Comparators (#) 0 Features I2C, Programmable Gain Rating Catalog Operating temperature range (C) -40 to 105
Common mode voltage (Max) (V) 26 Common mode voltage (Min) (V) 0 Input offset (+/-) (Max) (uV) 300 Input offset drift (+/-) (Typ) (uV/C) 0.6 Gain (V/V) 128, 20, 300 Gain error (%) 0.25, 0.5, 1 Gain error drift (+/-) (Max) (ppm/°C) 50 CMRR (Min) (dB) 100 Bandwidth (kHz) 25, 20, 10 Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 2.7 Iq (Max) (mA) 0.25 Number of channels (#) 1 Comparators (#) 0 Features I2C, Programmable Gain Rating Catalog Operating temperature range (C) -40 to 105
WSON (DSK) 10 —
  • Wide Common-Mode Range: 0 V to 26 V
  • ±100 µV Offset (Max, Gain = 300 V/V)
  • Accuracy
    • ±0.25% Shunt Voltage Gain Error (Max)
    • ±0.15% Bus Voltage Gain Error (Max)
    • 1.25% Power Error (Max)
    • 0.3 µV/°C Offset Drift (Max)
    • 50 ppm/°C Gain Drift (Max)
  • Programmable Gains
    • Current Shunt Voltage Gains: 20, 128, 300
    • Bus Voltage Attenuations: 1/10, 1/5, 2/5
  • Monitors/Measures/Reports:
    • Instantaneous Power
    • Bus Voltage
    • Load Current
  • Quiescent Current: 250 µA (Max)
  • Shutdown Current: 1 µA (Max)
  • Wide Common-Mode Range: 0 V to 26 V
  • ±100 µV Offset (Max, Gain = 300 V/V)
  • Accuracy
    • ±0.25% Shunt Voltage Gain Error (Max)
    • ±0.15% Bus Voltage Gain Error (Max)
    • 1.25% Power Error (Max)
    • 0.3 µV/°C Offset Drift (Max)
    • 50 ppm/°C Gain Drift (Max)
  • Programmable Gains
    • Current Shunt Voltage Gains: 20, 128, 300
    • Bus Voltage Attenuations: 1/10, 1/5, 2/5
  • Monitors/Measures/Reports:
    • Instantaneous Power
    • Bus Voltage
    • Load Current
  • Quiescent Current: 250 µA (Max)
  • Shutdown Current: 1 µA (Max)

The INA223 is a voltage-output device that monitors the current, bus voltage, and power of a supply line by sensing a voltage drop across a shunt at common-mode voltages from 0 V to 26 V. The common-mode voltage range is independent of the supply voltage. The low offset of the Zerø-Drift architecture enables current sensing with maximum drops across the shunt as low as 10 mV, full-scale.

The INA223 includes a two-wire interface used for adjusting the configuration settings of the device. The interface is used to control the signal (current shunt voltage, bus voltage, or power) that is directed to the device output. Multiple gain and attenuation settings can be programmed through the two-wire interface to allow for application-specific configurations. The programmable gain feature also allows the device to be operated over a much wider dynamic current load range without having to switch the sensing element used.

A shutdown feature is available to disable the device and effectively disconnect it from the shunt resistor and supply voltage, thus reducing the drain on the battery.

The INA223 operates from a single +2.7-V to +5.5-V supply, drawing a maximum supply current of 250 µA. It is specified over the extended temperature range of –40°C to +105°C, and is offered in an SON-10 package.

The INA223 is a voltage-output device that monitors the current, bus voltage, and power of a supply line by sensing a voltage drop across a shunt at common-mode voltages from 0 V to 26 V. The common-mode voltage range is independent of the supply voltage. The low offset of the Zerø-Drift architecture enables current sensing with maximum drops across the shunt as low as 10 mV, full-scale.

The INA223 includes a two-wire interface used for adjusting the configuration settings of the device. The interface is used to control the signal (current shunt voltage, bus voltage, or power) that is directed to the device output. Multiple gain and attenuation settings can be programmed through the two-wire interface to allow for application-specific configurations. The programmable gain feature also allows the device to be operated over a much wider dynamic current load range without having to switch the sensing element used.

A shutdown feature is available to disable the device and effectively disconnect it from the shunt resistor and supply voltage, thus reducing the drain on the battery.

The INA223 operates from a single +2.7-V to +5.5-V supply, drawing a maximum supply current of 250 µA. It is specified over the extended temperature range of –40°C to +105°C, and is offered in an SON-10 package.
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Technical documentation

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Type Title Date
* Data sheet Analog Output Current Shunt and Voltage Instantaneous Power Monitor datasheet 13 Jun 2012
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
Application note Energy and Power Monitoring with Digital Current Sensors 25 May 2017
Application note Understanding the I2C Bus PDF | HTML 30 Jun 2015
EVM User's guide INA223EVM User's Guide 11 Jun 2012

Design & development

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

Evaluation board

INA223EVM — INA223 Evaluation Module

The INA223EVM is a platform for evaluating the performance of the INA223 under various signal, shunt, and supply conditions.

User guide: PDF
Not available on TI.com
GUI for evaluation module (EVM)

INA223EVM Software

SBOC428.ZIP (101538 KB)
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Simulation model

INA223 TINA-TI Reference Design

SBOM771.TSC (2176 KB) - TINA-TI Reference Design
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Simulation model

INA223 TINA-TI Spice Model

SBOM772.ZIP (32 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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Calculation tool

Current Sense Amplifier Comparison and Error Tool (Rev. E)

SBOR020E.ZIP (592 KB)
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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-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
SON (DSK) 10 View options

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