Cost and Space Optimized, Channel Isolated(Reinforced) AC/DC Voltage, Current DAQ Reference Design

(ACTIVE) TIDA-01430

Description & Features

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Key Document

Description

This reference design highlights an architecture that is optimized for size and cost for achieving channel to channel isolation when measuring AC/DC voltage and current signals. Accuracy of ±0.3% is achieved using an ultra low power (<1mW @ 1MSPS) 12-bit ADC and an ARM core MCU. Space savings and component count reduction is achieved using a digital isolator with integrated power converter that isolates channels and ADC and MCU.

Features
  • Channel to channel isolation using digital isolator with integrated power converter (ISOW7841)
  • AC/DC voltage and current measurement accuracy
    • AC Voltage: < ±0.25% for 5V-300V
    • AC Current: < ±0.3% for 0.5A-50A
  • Ultra low power (<1mW) data acquisition using ADS7043/ADS7044 and TLVx316
  • Space savings achieved using REF1930 (integrated REF, REF/2) and ISOW7841 (integrated digital isolator, power converter)
  • Low power consumption and simplified multi-SPI interface achieved using MSP432P401R, an ARM® Cortex®-M4F based MCU

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Schematic/Block Diagram

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Design Guide

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Design Files

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Bill of Materials (BOM)

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TI Devices (10)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ADS7043  Ultra-Low-Power Ultra-Small-Size SAR ADC | 12 Bit | 1MSPS | Pseudo Differential  Analog-to-digital converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
ADS7044  Ultra-Low-Power Ultra-Small-Size SAR ADC | 12 Bit | 1MSPS | Fully Differential  Analog-to-digital converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
CSD17571Q2  30V N-Channel NexFET Power MOSFETs, CSD17571Q2  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
ISOW7841  High-efficiency, low-emissions, reinforced digital isolator with integrated power  Isolation  Sample & Buy View Design Kits & Evaluation Modules
LP5907  250-mA ultra-low-noise low-Iq low-dropout (LDO) regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules
REF1930  Dual Output Vref and Vref/2 Voltage Reference  Voltage references  Sample & Buy Not Available
SN74LVC1G17  Single Schmitt-Trigger Buffer  Buffer/driver  Sample & Buy View Design Kits & Evaluation Modules
TLV2316  10-MHz, Low-Noise, RRIO, CMOS Operational Amplifier for Cost-Sensitive Systems  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
TLV316  10-MHz, Low-Noise, RRIO, CMOS Operational Amplifier for Cost-Sensitive Systems  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
TLV431A  1% Accuracy Low-Voltage Adjustable Precision Shunt Regulator  Voltage references  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ADS7043 Download
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ADS7044 Download
Download Download
CSD17571Q2 WSON (DQK)| 6 Download Download
ISOW7841 Download Download
LP5907 Download Download
Download -
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SN74LVC1G17 Download -
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TLV2316 Download
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TLV316 Download
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TLV431A 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 Views TI Recommends
PDF 728 16 Mar 2018 0
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 736 23 Aug 2017 0
ZIP 1020 23 Aug 2017 0
PDF 1063 23 Aug 2017 0
PDF 279 23 Aug 2017 0
PDF 129 23 Aug 2017 0
PDF 629 23 Aug 2017 0
Related Tools & Software

Design Kits & Evaluation Modules  ( 1 )

Name Part Number Tool Type
SimpleLink™ MSP432P401R high-precision ADC LaunchPad™ Development Kit  MSP-EXP432P401R  Evaluation Modules & Boards 

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