AD7760/AD7762 Evaluation Board using

EVAL-CED1Z

EVAL-AD7760/AD7762EDZ

Rev. PrB

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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 EVAL-

AD7760/2EDZ 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 EVAL-

AD7760/2EDZ 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 EVAL-

AD7760/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.

CONTENTS OF EVALUATION KIT

•

AD7760/AD7762 evaluation board

(EVAL-AD7760/AD7762EDZ)

•

EVAL-AD7760_2EDZ evaluation software

CD—software and drivers

EVALUATION BOARD BLOCK DIAGRAM

AD7760/

AD7762

Differential Amplifier

External Feedback

Components

MCLK

Differential Input

XLR Connector

MCLK

Crystal

Oscillator

VINA+

VINA-

VOUTA+

VOUTA-

VIN+

VIN-

AVDD1-4

DVDD

RESET

RESET

XTAL

VDRIVE

EVAL-AD7760/AD7762EDZ

EVAL-CED1Z

USB

Power

+7.5V

Figure 1.