Isolated Current Shunt/Voltage Measurement Reference Design for Automotive Battery Pack Monitoring


Design files


This TI Verified Design provides the theory, component selection, TINA-TI simulations, Verification & Measurement Performance, Altium Schematics, PCB Layout for automotive Battery Pack monitoring application.  The design uses a automotive AEC-Q100 qualified 12-bit, 4-Channel, 1Msps SAR ADC, ADS7950-Q1 with isolated system hardware design.

This isolated input design with four-wire shunt resistor is well suited for such applications using high and low voltage automotive battery packs. It can be used to monitor the current from -5A to +5A and extremely high voltage (up to 750V) of battery pack.

The TINA simulations for the input and reference drive verify the design solution and componsent selection, and  the measured results  demonstrate  the performance of the precision design.


•  Isolated Sense Current (Bidirectional): -5A to +5A
•  Precision Current Measurement(Calibrated): <0.05%FSR
•  Extremely High Battery Voltage Measurement:  DC to 750V
•  High Voltage Measurement(Uncalibrated) : <0.05%FSR
•  Run-time GUI for complete performance analysis of this isolated precision design

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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUA81.PDF (3179 K)

Reference design overview and verified performance test data

TIDCBA0.ZIP (1693 K)

Detailed schematic diagram for design layout and components


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Includes TI products in the design and potential alternatives.

Precision ADCs

ADS7950-Q1Automotive, 12-bit, 1-MSPS, 4-channel, single-ended SAR ADC

Data sheet: PDF | HTML
Digital isolators

ISO7240CF-Q1Automotive, quad-channel, 4/0, 25-Mbps, default output low digital isolator

Data sheet: PDF
Digital isolators

ISO7242C-Q1Automotive, quad-channel, 2/2, 25-Mbps digital isolator

Data sheet: PDF
Isolated power modules (integrated transformer)

DCR010505Miniature, 1W Isolated Regulated DC/DC Converters

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

REG1041-A, 15-V, low-dropout voltage regulator with enable

Data sheet: PDF
Series voltage references

REF5025A-Q1Automotive, low-noise, very-low drift, precision 2.5-V series voltage reference

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide Current Shunt and Voltage Measurement for EV/HEV Auto Battery Design Guide Jun. 25, 2015

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