854085227EVAL_AD7933_AD7934| Application Note
Evaluation Board for 12-/10-Bit, 4-Channel ADCs with a Parallel Interface EVAL-AD7933/AD7934
FEATURES
Full-featured evaluation board for the AD7933/AD7934 EVAL-CONTROL-BRD2 compatible Standalone capability On-board analog buffering and voltage reference On-board single-ended-to differential conversion Various linking options PC software for control and data analysis when used with evaluation board controller
Full details about the parts are available in the AD7933/AD7934 data sheets from Analog Devices, Inc. It should be consulted in conjunction with this data sheet when using the evaluation board. On-board components include One AD780, a pin-programmable, 2.5 V or 3 V ultrahigh precision band gap reference One AD713 quad op amp One AD8022 dual op amp Six AD8021 single op amps Two AD8138 differential amplifiers One P174FCT digital buffer
GENERAL DESCRIPTION
This data sheet describes the evaluation board used for the AD7933/AD7934, which are 10-bit/12-bit, high speed, low power successive approximation analog-to-digital converters (ADCs). These parts operate from a single 2.7 V to 5.25 V power supply and feature throughput rates up to 1.5 MSPS. They can operate with four single-ended analog inputs, two fully differential analog inputs, or two pseudo differential analog inputs.
Various link options are explained in Table 1. Interfacing to this board is accomplished through a 96-way connector that is compatible with the EVAL-CONTROL-BRD2 from Analog Devices. External sockets are provided for a number of signals, including the VREF input, the analog inputs, and the digital inputs and outputs.
FUNCTIONAL BLOCK DIAGRAM
BIPOLAR SINGLE-ENDED INPUT SINGLE-ENDED-TODIFFERENTIAL CONVERSION USING AD8138 EXTERNAL SUPPLY
AD7933/ AD7934
VIN0 FOUR SINGLE-ENDED INPUTS OR TWO DIFFERENTIAL/PSEUDO DIFFERENTIAL PAIRS DB0 TO DB11 DATA BUS CONTROL LINES VIN2 VIN3 VREF CLKIN RD WR CS CONVST BUSY
UNIPOLAR SINGLEENDED INPUTS
VIN1
SINGLEENDED INPUT BUFFERING
BIPOLAR INPUT
Figure 1.
Rev. 0
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.
06205-001
OPTIONAL BIAS UP CIRCUITRY FOR SINGLE-ENDED/ PSEUDO DIFFERENTIAL OPERATION
UNIPOLAR INPUT
EXTERNAL REFERENCE
EXTERNAL CONNECTORS POWER SUPPLY CIRCUITS
96-WAY EDGE CONNECTOR
BIPOLAR SINGLE-ENDED INPUT
SINGLE-ENDED-TODIFFERENTIAL CONVERSION USING AD8138
VDD
VDRIVE
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