Evaluation Board for the AD7273/AD7274
3 MSPS, 10-/12-Bit ADCs
EVAL-AD7273/AD7274
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
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from its use. Analog Devices reserves the right to change devices or specifications at any time
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Evaluation boards are not authorized to be used in life support devices or systems.
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©2007 Analog Devices, Inc. All rights reserved.
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 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.
On-board components include:
•
One
AD780
, a pin progra2.5 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.
FUNCTIONAL BLOCK DIAGRAM
06
22
0-
0
01
VOLTAGE
REFERENCES
96-
W
A
Y E
D
G
E
CO
NNE
C
T
O
R
EXTERNAL POWER
SUPPLY
AIN
ANALOG
INPUT
VBIASED
VIN
BIAS UP
CIRCUIT
EXTERNAL
REFERENCE
INPUT BUFFER
POWER SUPPLY
CIRCUIT
AD7273/AD7274
V
REF
V
IN
V
DD
SCLK
SDATA
CS
EVAL-AD7273/AD7274CB
Figure 1.
Summary of Contents for AD7273
Page 11: ...EVAL AD7273 AD7274 Rev 0 Page 11 of 16 06220 007 Figure 7 Top View Solder Side...
Page 12: ...EVAL AD7273 AD7274 Rev 0 Page 12 of 16 06220 008 Figure 8 Drill Drawing Component Side View...
Page 13: ...EVAL AD7273 AD7274 Rev 0 Page 13 of 16 06220 009 Figure 9 Schematic...
