AD7274/AD7273 EVALUATION TOOLS

Introduction

The AD7274/AD7273 are high speed 12-bit and 10-bit, low power, successive-approximation ADCs respectively. The parts operate from a single 2.35 V to 3.6 V power supply and feature throughput rates up to 3 MSPS.

The EVAL-AD7274CB and the EVAL-AD7273CB can be used to evaluate the AD7274 and the AD7273 respectively. Accompanying each evaluation kit is the AD7274/73CB evaluation board and a CD-ROM containing a Technical Note, the datasheet and a description for the Evaluation Board Controller. The Technical Note describes the evaluation board for the AD7274/AD7273. Full details on the AD7274/AD7273 are also available in the AD7274/AD7273 datasheet (which can be downloaded from the AD7274 or AD7273 Product Pages) and this should be consulted in conjunction with this Technical Note when using the Evaluation Board.

On-board components include an AD780, which is a pin programmable +2.5 V or +3 V ultra high precision bandgap reference, the AD711 quad op-amp used to buffer the analog inputs and the REF195 precision bandgap voltage reference providing a 5V reference voltage. 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 Evaluation board controller (EVAL-CONTROL BRD2), which is also available from Analog Devices. External sockets are provided for the AIN input, the VIN input and the VBIASED input.

Software

Included in the EVAL-AD7274CB and EVAL-AD7273CB evaluation board package is software for controlling and evaluating the performance of the AD7274 and AD7273 when it is operated with the EVALUATION BOARD CONTROLLER. The EVAL-AD7274/73CB Demonstration/Evaluation Software runs under Windows 95, 98, 2000 and NT. The user interface on the PC is via a dedicated program written especially for the EVAL-AD7274CB and EVAL-AD7273CB.

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