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


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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TI Devices (7)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ADS7950-Q1  Automotive 12 bit, 1 MSPS, 4 Channel, Single-Ended, SAR ADC  Analog-to-digital converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
DCR010505  Miniature, 1W Isolated Regulated DC/DC Converters  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules
ISO7240CF-Q1  Automotive Catalog Quad, 4/0, 25Mbps, Digital Isolator, Selectable Failsafe  Isolation  Sample & Buy Not Available
ISO7242C-Q1  Automotive Catalog Quad Channel, 2/2, 25Mbps, Digital Isolator  Isolation  Sample & Buy View Design Kits & Evaluation Modules
OPA2320-Q1  Automotive Qualified Precision, Zero-Crossover, 20MHz, 0.9pA Ib, RRIO, CMOS Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
REF5025A-Q1  Automotive Low Noise, Very Low Drift, Precision 2.5V Series Voltage Reference  Voltage references  Sample & Buy Not Available
REG104  1A, Low-Noise, Low Dropout Regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ADS7950-Q1 Download -
DCR010505 Download -
Download Download
ISO7240CF-Q1 Download Download
ISO7242C-Q1 Download Download
OPA2320-Q1 Download
REF5025A-Q1 Download Download
REG104 Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 3179 25 Jun 2015
Design files (2)
Title Type Size (KB) Date
PDF 134 16 Oct 2015
PDF 854 16 Oct 2015
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