8/10-CHANNEL, 24-BIT, SIGMA DELTA ADC

Introduction

This Technical Note describes the evaluation board for the AD7718, 8/10-Channel, Low Voltage, Low Power, 24-Bit, Sigma Delta ADC. The AD7718 is a complete analog front end for low frequency measurement appli-cations. The AD7718 is factory calibrated and therefore does not require field calibration. The device can accept low level input signals directly from a transducer and produce a serial digital output. It employs a sigma-delta conversion technique to realize up to 24 bits of no missing codes performance. The selected input signal is applied to a proprietary programmable gain front end based around an analog modulator. The modulator output is processed by an on-chip digital filter. The first notch of this digital filter can be programmed via an on-chip control register allowing adjustment of the filter cutoff and output update rate. Full data on the AD7718 is available in the AD7718 datasheet (available on the AD7718 Product Page) and should be consulted in conjunction with this Technical Note when using the evaluation board.

Documentation

Technical notes are available in Adobe Acrobat Portable Document Format (PDF).
To download the Technical Note, select the link below:

Software

The software provided runs under Windows 2000 and will allow the user to control all the functions of the AD7718 via the printer port of a PC. The software should be installed by running the SETUP.EXE program.

To download the Technical Note, select the link below:

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