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EV-HT-200CDAQ1 Overview
The EV-HT-200CDAQ1 is a complete system reference platform enabling precision data acquisition and control in extreme temperatures up to 200°C. Based upon the AD7981 analog-to-digital SAR converter, this reference design demonstrates a full featured system with two high speed simultaneously sampled channels along with 8 additional multiplexed channels suitable for covering the acquisition requirements for many high temperature, harsh environment application such as downhole oil and gas instrumentation. The data acquisition front end is connected to the VORAGO Technologies VA10800 ARM® Cortex®-M0 based microcontroller via multiple SPI ports. Once acquired, the data can be processed locally or transmitted via a UART or optional RS485 communications interface. In addition to the hardware, open source firmware uses FreeRTOS with optimized drivers and a data acquisition protocol with multiple modes of operation. Open source host software allows the users to connect to the board via UART to control acquisition modes, view data, log data and perform signal analysis. This platform is suitable as reference design, for rapid prototyping and lab testing of high temperature instrumentation systems.
Hardware Features
All Components and PCB Rated and Tested for 200°C Operation
Optimized Analog Devices Data Acquisition Front End
2 AD7981 ADC channels capable of 400ksps simultaneous sampling
1 AD7981 multiplexed channel (8 inputs) capable of 16ksps min sampling
0-2.5V analog input range
VORAGO VA10800 32-bit ARM® Cortex®-M0 MCU
50MHz clock rate
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128kB on-chip program memory
SRAM
TTL
UART communications, optional RS485
HT Boot flash, system clock and core power supply
Optmized hardware interface to Analog Devices data acquisition front end
Flexible, Low Power Configurations
+/-5VDC bipolar analog and 3.3VDC Digital power supplies for best analog performance
+3.3V single supply operating mode for simpler power configuration, with reduced analog performance
Low power operation: 155mW typical power consumption
Ease of Use Features for Prototype and Development
Software Features
Open Source Firmware and Software Optimized for Data Acquisition
Firmware and Host software design driven by a common protocol definition, which enables flexible data acquisition optimized for resource constrained systems
Multiple modes of data acquisition supported
FreeRTOS Firmware Integration
PC Host Data Viewer
Supports control of the board operation and real-time viewing of all channels of data acquisition
Robust frequency domain signal analysis tools
Ability to log data to CSV format
Design Package Details
Hardware Design Package
Schematics
Assembly Drawing
Fabrication Drawing
Gerbers
Bill of Materials
Software Binaries
Software Source