AD7264/AD7262, TRUE DIFFERENTIAL,DUAL,1 MSPS, 14-BIT/12-BIT, 2-CHANNEL SAR ADC WITH PGA EVALUATION TOOLS (EVAL-AD7264EDZ) USING EVAL-CED1Z

Introduction

The AD7262 and the AD7264, are dual, 12-bit/14-bit, high speed, low power, successive approximation ADC's, that operate from a single 5 V power supply and features throughput rates up to 1MSPS, per on-chip ADC. Two complete ADC functions allow simultaneous sampling and conversion of two channels. The device contains two ADCs, each preceded by a true differential analog input with a PGA. In addition, the AD7264/AD7262 contains four comparators.

The evaluation tools for the AD7264 incorporate:

The Eval-AD7262/AD7264 board has enhanced functionality and operates in conjunction with EVAL-CED1Z. Software for controlling the AD7264/AD7262 is provided in conjunction with the EVAL-CED1Z. This software enables the user to perform detailed analysis of the ADC's performance. This analysis includes, AC (FFT) and DC (linearity, waveform and histogram plots) analysis. The software was developed with Labview and both the source code and the executable are available. Interfacing to the Eval-AD7262/AD7264 is through a 96-way connector. This 96-way connector is compatible with the EVAL-CED1Z. See below for the relevant documentation for the system including technical notes and software downloads.

al-AD7262/AD7264 also incorporates standalone capability which can be selected by setting the appropriate link options. The board includes circuitry for converting a single ended signal to a differential signal but since each ADC on the AD7262/AD7264 is proceeded by an internal PGA, no external buffers is required. Accordingly, we recommend that the AD7262/AD7264 analog inputs be driven directly with a differential signal.

Documentation

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

Converter Evaluation and Development Board (EVAL-CED1Z)

The evaluation board for each of the AD7262 and AD7264 products is controlled by the CED1Z (Converter Evaluation and Development Board) (pdf, 1.43 MB).
Please see the CED1Z homepage for more details.

Software

EVAL-AD7264EDZ software is available to the user in both Labview source code and in an executable version. The software download also includes source FPGA code used in the EVAL-AD7264EDZ system and an example C source file showing how to interface to the EVAL-AD7264EDZ evaluation system.

To download the evaluation software package, select the link below, save the zip file to the PC and then run the install.