Analog Devices AD7273 Manual

FEATURES

Full-featured evaluation board for the AD7273/AD7274
EVAL-CONTROL-BRD2 compatible
Standalone capability
On-board analog buffering and voltage reference
Various linking options
PC software for control and data analysis when used with
EVAL-CONTROL-BRD2

GENERAL DESCRIPTION

This data sheet describes the evaluation board for the AD7273/
AD7274. The AD7273/AD7274 are, respectively, 12-bit and
10-bit, high speed, low power successive approximation ADCs.
The parts operate from a single +2.35 V to +5.25 V power
supply and feature throughput rates up to 1 MSPS. The parts
contain a low noise, wide bandwidth track/hold amplifier that
can handle input frequencies in excess of 6 MHz. Full data on
the AD7273/AD7274 is available in the AD7273/AD7274 data
sheet, which is available from Analog Device, Inc., and should
be consulted in conjunction with this data sheet when using the
evaluation board.
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.
Evaluation Board for the AD7273/AD7274

FUNCTIONAL BLOCK DIAGRAM

EXTERNAL POWER
SUPPLY
EXTERNAL
REFERENCE
INPUT BUFFER
ANALOG
INPUT
AIN
BIAS UP
CIRCUIT
VIN VBIASED
3 MSPS, 10-/12-Bit ADCs
EVAL-AD7273/AD7274
On-board components include:
•
One AD780, a pin programmable +2.5 V or +3 V ultra
high precision band gap reference
•
One REF195 precision band gap, voltage reference,
providing a 5 V reference voltage
•
One OP467 quad op amp used to buffer the analog inputs
Because of its standard pinout, the AD780 reference can be
swapped for the AD680, a +2.5 V low power reference. In the
same way, the REF195 can be easily interchanged for another
one from the same REF19x family, always bearing in mind the
voltage range of the part. There is also an option to supply an
external voltage to the part. Various link options are explained
in detail in the Link and Switch Options section.
Interfacing to this board is through a 96-way connector. This
96-way connector is compatible with the EVAL-CONTROL-
BRD2, which is also available from Analog Devices. External
sockets are provided for the AIN input, the VIN input, and the
VBIASED input.
VOLTAGE
REFERENCES
V V
REF DD
CS
SCLK
V
IN
SDATA
AD7273/AD7274
POWER SUPPLY
CIRCUIT
EVAL-AD7273/AD7274CB
Figure 1.
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Tel: 781.329.4700
Fax: 781.461.3113
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