Evaluation Board for 24-Bit,8.5mW,109dB,
128/64/32kSPs ADC
Preliminary Technical Data
EVAL-AD7766/66-1/66-2EDZ
Rev. PrB
Evaluation boards are only intended for device evaluation and not for production purposes.
Evaluation boards are supplied “as is” and without warranties of any kind, express, implied, or
statutory including, but not limited to, any implied warranty of merchantability or fitness for a
particular purpose. No license is granted by implication or otherwise under any patents or other
intellectual property by application or use of evaluation boards. Information furnished by Analog
Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog
Devices for its use, nor for any infringements of patents or other rights of third parties that may result
from its use. Analog Devices reserves the right to change devices or specifications at any time
without notice. Trademarks and registered trademarks are the property of their respective owners.
Evaluation boards are not authorized to be used in life support devices or systems.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2007 Analog Devices, Inc. All rights reserved.
FEATURES
Full-featured evaluation board for the:
AD7766
AD7766-1
AD7766-2
EVAL-CED1Z compatible
Standalone capability
On-board analog buffering and voltage reference
Various linking options
PC software for control and data analysis when used with the
EVAL-CED1Z
GENERAL DESCRIPTION
This data sheet describes the evaluation board for the, AD7766,
AD7766-1, AD7766-2, which are 24-bit, single-channel,
oversampled successive-approximation (SAR) ADCs. These
parts operate from 2.5V power supply, (AVDD1, DVDD), a
1.8V to 5V VDRIVE and use a 5V reference ADR445.
The AD7766 has a maximum output data rate of 128 KHz. The
derivatives AD7766-2 operate at a max speed of 64 KHz, with
the AD7766-2 offering a max speed of 32 KHz. The AD7766-1
and AD7766-2 versions digitally filter more rigorously, meaning
that greater noise performance is achieved, trading off on
output data rate.
All the AD7766 devices (AD7766, AD7766-1, AD7766-2) offer
16-bit linearity (15ppm).
Full details on the versions of the AD7766 are available in the
AD7766 data sheet, which is available from Analog Devices,
Inc., and should be consulted in conjunction with this data
sheet when using the evaluation board.
ON-BOARD COMPONENTS INCLUDE:
ADR445, 5 V ultrahigh precision band gap reference
Two ADA4841-1 operational amplifiers
(Run from 7.5V and -2.5V external supplies).
Various MCLK options
Various link options are explained in the Evaluation Board
Hardware section. Interfacing to this board is through a 96-way
connector. This 96-way connector is compatible with the CED,
which is available from Analog Devices. External connectors are
provided for a number of signals.
EVAL-CED1Z
EVAL-AD7766/-1/-2EDZ
AD7766/
AD7766-1
AD7766-2
1MHz
Clock
+7.5V
GND
-2.5V
External Supplies
DRD Y
96-Way Connector
XLR
Connector
U1
ANALOG
INPUT
1.024Mhz
SDO
SCLK
MCLK
CS
7.5V
Supply
Mini-USB
Input
2 x ADA4841-1
Op-amps
ADR445
Figure 1. Evaluation Board Block Diagram
