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Analog Devices / Maxim Integrated MAXREFDES38 Reference Design

Analog Devices Inc. MAXREFDES38 Reference Design provides the low-power, high-speed, high-accuracy analog front-end designed for the ECT/EPT or current fault sensor application. It features a low-power, 16-bit, high-accuracy, three-channel analog input. Input channels can be configured as ±3VP-P single-ended or ±6VP-P differential. 

The MAXREFDES38# design integrates a three-channel analog switch (MAX14531E); a quad precision low-power buffer (MAX44245); a 16-bit fully differential ADC (MAX11901); an ultra-high-precision, 3V voltage reference (MAX6126); a low-noise precision op amp (MAX44241); a STM32L1 microcontroller; a supervisory circuit (MAX16058); a 64kB SRAM, a FTDI USB-UART bridge; a dual-output step-down DC-DC converter (MAX1775); a switched-capacitor voltage converter (MAX1044); and -3V, 1.8V, 3.3V, 3.38V, 4.5V power rails (MAX1735/MAX8891/MAX8881/MAX8902B/MAX16910). The entire system typically operates at less than 85mW and fits into a space roughly the size of a credit card.

Features

  • High accuracy
  • Low power
  • Accepts 3VP-P single-ended signal or 6VP-P differential signal
  • Optimized layout and size
  • Device drivers
  • Example C source code
  • Test data

Applications

  • ECT/EPT
  • Current fault sensors

Block Diagram

Block Diagram - Analog Devices / Maxim Integrated MAXREFDES38 Reference Design
Inilathala: 2014-11-19 | Na-update: 2023-04-13