AD7896: 2.7V TO 5.5V,12-BIT SERIAL 8µS ADC

Introduction

This Application Note describes the evaluation board for the AD7896 A/D converter. The AD7896 is a fast 12-bit ADC which operates from a single +2.7V to +5.5V supply. The part incorporates an 8µS successive approximation ADC, an on chip track/hold amplifier, an on-chip clock and a high speed serial interface. Full data on the AD7896 is available in the AD7896 data sheet available from Analog Devices and should be consulted in conjunction with this Application Note when using the Evaluation Board.

On-board components include an AD780 which is a pin programmable +2.5V or +3V ultra high precision bandgap reference, a REF195 which is a +5V reference and an AD713 quad op-amp used to buffer and bias (if required) the analog input. There are various link options which are explained in detail on page 2.

Interfacing to this board is through a 96-way connector. This 96- way connector is compatible with the Evaluaton Board Controller which is also available from Analog Devices.

External sockets are provided for the CONVST input, SCLK input, SDATA output, BUSY output and the VIN input.

Features

Documentation

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

Software

Included in the EVAL-AD7896CB evaluation board package is software for controlling and evaluating the performance of the AD7896 when it is operated with the EVALUATION BOARD CONTROLLER. The EVAL-AD7896CB Demonstration/Evaluation Software runs under Windows 95 & 98. The user interface on the PC is via a dedicated program written especially for the EVAL-AD7896.
To download the software, select the link below: