Voltage & Current (Power) Measurement AFE for mV Output Sensor Interface to SAR ADC Reference Design

(ACTIVE) TIDA-00493

Description & Features

Technical Documents

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

Key Document

Description

The TIDA-00493 TI design is a fixed gain amplifier stage for measuring low amplitude voltage and current inputs accurately over a wide dynamic range using SAR ADC for power measurement applications. Low-amplitude AC voltage from voltage dividers, current transformers or split core current sensors with a 333-mV output can be accurately measured.

Features
  • Op-Amp Based Fixed Gain Amplifier Stage for Voltage and Current Inputs With Output Compatible to ADS8688 Input Range of ±2.56, ±5.12, and ±10.24 V.
  • Configurations Provided:
    • Voltage Input With Resistor Divider > 1-MΩ Impedance (No External PT Required)
    • 333-mV AC Voltage Output Type Current Sensor Interface
    • CT Secondary Input With Burden Resistor: Single-Ended & Differential
  • Onboard Programmable Reference Provided for Single-Ended Measurement Applications.

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


  




TI Devices (3)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ADS8688  16-Bit, 500-kSPS, 8-Channel, Single-Supply, SAR ADCs with Bipolar Input Ranges  Analog-to-Digital Converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
OPA4180  0.1 uV/C Drift, Quad, Low Noise, Rail-to-Rail, 36V Zero Drift Op Amp  Operational Amplifiers (Op Amps)  Sample & Buy View Design Kits & Evaluation Modules
TPS65131  Split-Rail Converter with Dual Positive and Negative Outputs (300mA typ)  Buck/Boost, Inverting or Split-Rail  Sample & Buy View Design Kits & Evaluation Modules

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 3948 19 Jun 2015 362
Selection guides (1)
Title Abstract Type Size (KB) Date Views
PDF 9699 22 Mar 2017 4,311
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 704 25 Jun 2015 38
ZIP 1863 25 Jun 2015 49
PDF 199 25 Jun 2015 30
PDF 92 25 Jun 2015 25
PDF 230 25 Jun 2015 39
PDF 1273 25 Jun 2015 129


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