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This version is outdated by a newer approved version.This version (21 Sep 2017 03:54) is a draft.Approvals: 0/1
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Table of Contents
CN0254 Evaluation Board Guide
Overview
CN0254 is a cost effective, highly integrated 16-bit, 250 kSPS, 8-channel data acquisition system that can digitize ±10 V industrial level signals. The circuit also provides 2500 V rms isolation between the measurement circuit and the host controller, and the entire circuit is powered from a single isolated PWM controlled 5 V supply.
The AD7689 16-bit, 8-channel, 250 kSPS PulSAR ADC contains all the necessary components for the multichannel low power data acquisition system. It includes a 16-bit SAR ADC, an 8-channel low crosstalk multiplexer, a low drift reference and buffer, a temperature sensor, a selectable one-pole filter, and a channel sequencer. The sequencer is useful for continuously scanning channels, and a microcontroller or FPGA is not required to control channel switching.
The AD8605 and AD8608 are low cost single and quad rail-to-rail input and output CMOS amplifiers. The AD8608 inverts, level shifts, and attenuates the ±10 V input signal so that it matches the input range of the ADC, which is 0 V to +4.096 V when using a +4.096 V reference and a +5 V single supply. The AD8605 acts as an external reference buffer to provide sufficient driving ability for level shifting.
The ADuM3471 is a quad-channel digital isolator with an integrated PWM controller and transformer driver for an isolated dc-to-dc converter. It provides the isolated 5 V, 2 W power for the circuit as well as isolates the digital signals at the SPI interface.
The EVAL-CN0254-SDPZ board connects to ADI’s System Demonstration Platform (SDP) and is powered by a 6 V power supply.
Required Equipment
- EVAL-SDP-CB1Z Controller Board (SDP-B Board)
- DC Power Supply (6 V, 500 mA)
- PC with the following Minimum Requirements
- Windows® XP, Windows Vista (32-bit), or Windows 7 (32-bit)
- USB interface
General Setup
resources/eval/user-guides/circuits-from-the-lab/cn0254.1505958877.txt.gz · Last modified: 21 Sep 2017 03:54 by Trisha Cabildo