EVALUATION BOARD FOR THE AD7730 TRANSDUCER ADC

Introduction

This Technical Note describes the evaluation board for the AD7730, Transducer ADC. The AD7730 is a complete analogfront-end for weigh-scale and pressure measurement applications. The device accepts low-level signals directly from a transducer and outputs a serial digital word. The part features two buffered differential programmable gain analog inputs as well as a differential reference input. An on-chip 6-bit DAC allows the removal of TARE voltages. Clock signals for synchronizing ac excitation of the bridge are also provided. Full data on the AD7730 is available in the AD7730 data sheet available from Analog Devices and should be consulted in conjunction with this Technical Note when using the Evaluation Board.

Included on the evaluation board, along with the AD7730, are an AD780, a +2.5 V ultra high precision bandgap reference, a 4.9152 MHz crystal and digital buffers to buffer signals to and from the edge connectors.

Interfacing to this board is provided either through a 36-WayCentronics Connector or through a 9-way D-type connector. External sockets are provided for the analog inputs, an external reference input option and an external master clock option.

Features

  • Operates from a Single +5 V Supply
  • On-Board Reference and Digital Buffers
  • Various Linking Options
  • Direct Hook-Up to Printer Port of PC
  • PC Software for Control and Data Analysis

Documentation

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

Software

Software to control the AD7730 Evaluation kit. To download the software, select one of the links below:

  • AD7730_1.zip - Win3x, Win95, Win98
    (zip, 502,000 bytes)
  • AD7730_3.zip - WinNT, Win95, Win98, Win2000, WinXP
    (zip, 3,820,851 bytes)
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