High Accuracy ±0.5% Current and Isolated Voltage Measurement Ref Design Using 24-Bit Delta-Sigma ADC
Description
The TIDA-00835 reference design allows for accurate voltage and current measurement using a bipolar input configuration by incorporating a four- channel: 24-bit simultaneously-sampling differential input Delta-Sigma ADC over wide dynamic range. The ADC is configured to measure ±2.5 V bipolar input. The inputs are scaled to ADC measurement range of ±2.5V using a fixed gain amplifier. This AFE chains two ADCs together using a common external clock to expand the number of input channels to eight while simultaneously sampling all of the input channels. By having more measurement channels per module: overall system cost is reduced.
Features
- Precision data acquisition over wide input range using 4-channel: simultaneous sampling: 24-Bit ∑-∆ ADCsChannel expansion by chaining multiple devices and simultaneous sampling by synchronizing with a buffered common clockCurrent measurement – performance verified using current transformer or Rogowski coil with hardware integratorVoltage measurement – performance verified using potential divider (PD) without and with an isolation amplifier (basic or reinforced isolation)
Applications
- Digital multimeter (DMM)
- HVAC controller
- Lab & field Instrumentation
- Power quality analyzer
- Multifunction relay
- Battery energy storage system
- Remote power distribution automation
- Door operator drive control
- Standalone avionics PFC
- HVAC motor control
- HVAC valve & actuator control
- AC analog input module
- Substation automation
- Circuit breaker (ACB
- MCCB
- VCB)
Product Categories
- Data converters