EVAL_AD7262_7264| Application Note
Evaluation Board for True Differential, Dual, Simultaneous Sampling, 12-/14-Bit ADC with PGA
EVAL-AD7262/AD7264
FEATURES
Full-featured evaluation board for the AD7262 and AD7264 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 EVAL-CED1Z true differential analog input with a PGA. There are fourteen gain settings available, 1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48,
64, 96, and 128. In addition, the AD7264 and AD7262 contain four comparators. Full details on the AD7262 and AD7264 are available in the AD7262 and AD7264 data sheets available from Analog Devices, Inc., which should be consulted in conjunction with this data sheet when using the evaluation board.
GENERAL DESCRIPTION
On-board components include: an AD780, a pin-programmable 2.5 V or 3 V ultrahigh, precision, band gap reference, and two SN74LVC1G125 digital buffers. Various link options are explained in the Evaluation Board Hardware section. Interfacing to this board is done through a 96-way connector. This 96-way connector is compatible with the EVAL-CED1Z also available from Analog Devices. External sockets are provided for multiple signals.
PART DESCRIPTION
This data sheet describes the evaluation board for the AD7262 and the AD7264, which are dual, 12-bit/14-bit, high speed, low power, successive approximation analog-to-digital (ADCs). The parts operate from a single 5 V power supply and feature throughput rates up to 1 MSPS per on-chip ADC. Two complete ADC functions allow simultaneous sampling and conversion of two channels. Both devices contains two ADCs, each preceded by a
FUNCTIONAL BLOCK DIAGRAM
EXTERNAL SUPPLY
AVCC VA+ VA EXTERNAL VREF VREF A VREF B VB+ VB CA+ CA CB+ CB CC+ CC CD+ CD G0 G1
AVCC
VDRIVE DOUTA
AD7262/ AD7264
SCLK CS PDO/DIN DOUTB
96-WAY EDGE CONNECTOR
POWER SUPPLY CIRCUITS
COUTA COUTB COUTC COUTD G2 G3 PD1 PD2
A B C VDRIVE
A B C VDRIVE
A B C VDRIVE
A B C VDRIVE
A B C VDRIVE
A B C VDRIVE
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. www.analog.com Tel: 781.329.4700 Fax: 781.461.3113 2008 Analog Devices, Inc. All rights reserved.
07606-001
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