FEATURES

Full-featured evaluation board for the AD7760/AD7762

EVAL-CED1Z compatible

On-board 4.096 V reference

Crystal clock oscillator MCLK source

PC software for control and data analysis for

use with EVAL-CED1Z

Filter Programmability – Load custom filter to AD7760/62

EVALUATION BOARD DESCRIPTION

This data sheet describes the evaluation board for the AD7760/AD7762 Σ-Δ ADCs. The AD7760 is a 24-bit ADC that combines wide input bandwidth and high speed with the benefits of Σ-Δ conversion with a performance of 100 dB SNR at 2.5 MSPS, making it ideal for high-speed data acquisition.

The AD7762 derivative is a parallel version with maximum output data rate of 625 kSPS.

Complete specifications for the AD7760/AD7762 devices are available in the AD7760/AD7762 data sheets available from Analog Devices, Inc., and should be consulted in conjunction with this data sheet when using the evaluation board.

The evaluation software is available to download from the AD7760/AD7762 product pages. This includes both the Labview source code and the FPGA interfacing code, which is written for the FPGA on the acquisition board – CED1Z.

The AD7760 interfacing signals are created by the EVAL-CED1Z board which should be used in conjunction with EVALAD7760/2EDZ board to enable data acquisition via the provided software and USB link.

The EVAL-AD7760/2EDZ board itself includes all routing required for evaluating the AD7760/2 device.

The MCLK signal for the main device is generated from a 40 MHz crystal oscillator. The user can also choose if required, to drive the AD7760/AD7762 with an external clock source by inserting the 0 Ω link to the SMB marked “MCLK”.

The AD7760/AD7762 evaluation board comes with an on-board FPGA device that is used to interface with the EVAL-CED1Z board. The combination of the EVALAD7760/2EDZ board and EVAL-CED1Z board allied with the EVAL-AD7760/AD7762EDZ software allows the user to upload samples taken by the AD7760/AD7762 device onto a PC showing

the waveform being sampled, as well as allowing the data to be shown in histogram or FFT format. The EVALAD7760/AD7762EDZ can also be used on a standalone basis(without EVAL-CED1Z); however, in this case the user must provide the required interface and acquisition requirements.