16-Bit 1-MSPS Data Acquisition Reference Design, Isolated for High-Voltage Common-Mode Rejection
TIDA-00106
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
- Data Acquisition System for High-Voltage Common Mode Rejection Design Guide
(PDF 4826 KB)
01 Mar 2016
Description
The circuit represents a high-performance data acquisition (DAQ) solution suitable for processing input signals (up to ±12 V) superimposed on large common-mode offsets (tested up to 155 Vp-p from dc to approximately 15 kHz) relative to the ground potential of the system's main power supply. Common-mode rejection is achieved by generating an isolated power supply to allow the analog signal chain to float with the input common-mode signal. The analog signal chain consists of a high-performance, 16-bit, 1-MSPS SAR ADC with an integrated analog front end (AFE) that offers high input impedance and a wide ±12-V input voltage range. Relevant application areas include PLC analog input modules with channel-to-channel isolation, automotive battery pack monitoring, power monitoring in AC motor drives and thermocouple measurements.
Features
- Provides 16-bit, 1-MSPS, 120-dB CMRR, 108-dB THD, performance via Isolation
- Isolated data acquisition to allow for high-voltage common-mode rejection
- Isolated power supply design
- Design facilitates injecting high common-mode voltages for testing
See the Important Notice and Disclaimer covering reference designs and other TI resources.
