TIDA-00106 Reference Design

Texas Instruments

16-Bit 1-MSPS Data Acquisition Reference Design: Isolated for High-Voltage Common-Mode Rejection

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
Applications
  • Lab & field Instrumentation
Product Categories
  • Data converters

End Equipment Reference Diagrams

Parts

Part Number Name Companion Part
ISO7640FM ISO7640FM Buy Datasheet
SN6501 SN6501 Buy Datasheet
SN74AUC17 SN74AUC17 Buy Datasheet
TLV3012 TLV3012 Buy Datasheet

Bill Of Materials

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Schematic

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Design File

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Test Data

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Other Documents

Title Updated Type Size (KB)
TIDA-00106 Gerber 16 Mar 2016 ZIP 1216
TIDA-00106 BOM 16 Mar 2016 PDF 99
TIDA-00106 Schematic 16 Mar 2016 PDF 796