Reference Designs
Voltage & Current (Power) Measurement AFE for mV Output Sensor Interface to SAR ADC Reference Design
Texas Instruments
This reference 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 V: ±5.12 V and ±10.24 VConfigurations provided:Voltage input with resistor divider > 1-MΩ impedance (no external PT required)333-mV AC voltage output-type current sensor interfaceCT secondary input with burden resistor: single-ended and differentialOnboard programmable reference provided for single-ended measurement applications.
Applications
- Oscilloscopes & digitizers
- Spectrum analyzer
- Remote power distribution automation
- Grid asset monitoring
- Vector signal transceiver (VST)
- AC analog input module
- Binary input module
- Substation automation
- Wireless communications test
Product Categories
- Amplifiers
End Equipment Reference Diagrams
Application Area
End Equipment
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