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High Accuracy Analog Front End Using 16-Bit SAR ADC with ±10V Measurement Range Reference Design
TIDA-00834
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
See the Important Notice and Disclaimer covering reference designs and other TI resources.
Key Document
- High-accuracy analog front-end reference design using 14-,16-,18-bit SAR ADC (Rev. B)
(PDF 873 KB)
20 Feb 2019
Description
The TIDA-00834 reference design accurately measures voltage and current inputs using simultaneously sampled, 16-bit, ±10 V, bipolar input SAR ADC critical to identify power systems malfunction and power quality related failures accurately and quickly. This results in reduced power systems downtime. The AFE includes signal conditioning based on precision instrumentation or precision amplifier for current measurement upto 125A and opamp based signal conditioning circuit for voltage measurement upto 300V. The gain amplifier for voltage and current inputs are used to scale the sensor output to the ADC range. Coherent sampling of the analog input signals is implemented using comparator and FPGA. The power supply for data acquisition front end is generated using a +5V input.
Features
- Based on bipolar input 16-bit 8-channel simultaneous sampling SAR ADC simplifying system design
- On-board potential divider with reinforced isolation amplifier and fixed gain precision amplifier for measurement up to 300V
- On-board DC/DC converter and LDOs to generate ±12V, ±15V, ±5V, +5V, +3.3V and isolated +5V from single +5V input for easy adaptation to current designs
- Measurement accuracy within ±0.25% for ≥ 1000:1 dynamic range
- Option to configure sampling rate and number of cycles for data capture using HMI enhancing system performances
See the Important Notice and Disclaimer covering reference designs and other TI resources.
