Reference Design for Interfacing Current Output Hall Sensors and CTs with Differential ADC/MCU

(ACTIVE) TIDA-00368

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Key Document

Description

The TIDA-00368 reference design provides a reference solution for interfacing current output Hall sensors and current transformers to differential ADC (standalone and integrated into MCU). The differential signal conditioning circuit is designed to measure motor current with an accuracy of ±0.5% across operating temperature range from -25°C to +75°C. The output common-mode voltage of the differential amplifier can be selected to either 1.25V or 2.5V.

Features
  • On board current-output Hall sensor to measure nominal current up to 25A RMS
  • Current measurement accuracy of 0.5%
  • Common reference solution for interfacing both CT and current output hall sensor with Pseudo-differential ADC/MCU
  • Selectable output common-mode voltage for the differential amplifier
  • Provision to evaluate with Delfino F2837x Control Card
  • Provision to evaluate with external ADC (ADS8354) for interfacing with Motor Controller

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Design Files

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Bill of Materials (BOM)

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TI Devices (8)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LP2992  Micropower 250 mA Low-Noise Ultra Low-Dropout Regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules
OPA322  20MHz Low-Noise 1.8V RRIO CMOS Operational Amplifier With Shutdown  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
REF2025  8ppm/°C Drift, Low-Power, Dual-Output Vref and Vref/2 Voltage Reference  Voltage references  Sample & Buy Not Available
THS4531A  Ultra Low Power, RRO, Fully-Differential Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
TLV1702  Dual, 2.2-V to 36-V, microPower Comparator  Amplifiers  Sample & Buy Not Available
TPS62150  3–17V 1A Step-Down Converter with DCS-Control in 3x3 QFN package  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
TPS7A30  Vin -3V to -36V, -200mA, Ultra-Low-Noise, High-PSRR, Low-Dropout (LDO) Linear Regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS7A49  Wide VIN, 150-mA, ultra-low-noise, high-PSRR low-dropout (LDO) linear regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LP2992 Download Download
Download Download
OPA322 Download Download
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REF2025 Download -
THS4531A Download
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TLV1702 Download Download
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TPS62150 Download Download
TPS7A30 Download Download
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TPS7A49 Download Download
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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date
PDF 10586 25 Aug 2015
Design files (6)
Title Abstract Type Size (KB) Date
ZIP 609 22 Jun 2015
ZIP 3970 22 Jun 2015
PDF 284 22 Jun 2015
ZIP 357 22 Jun 2015
PDF 68 22 Jun 2015
PDF 1248 22 Jun 2015

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