EVAL-AD7912_15 Datasheet, PDF (1/16 Pages) Analog Devices – Evaluation Board for 1 MSPS, 2-Channel, 12-/10-Bit ADCs

Evaluation Board for 1 MSPS,
2-Channel, 12-/10-Bit ADCs
EVAL-AD7912/AD7922
FEATURES
Full-featured evaluation board for the AD7912/AD7922
EVAL-CONTROL-BRD2 compatible
Standalone capability
On-board analog buffering and 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 AD7912/
AD7922. The AD7912/AD7922 are 12- and 10-bit, high speed,
low power successive-approximation ADCs, respectively. The
parts operate from a single 2.35 V to 5.25 V power supply and
feature throughput rates up to 1 MSPS. Full data on the AD7912/
AD7922 is available in the AD7912/AD7922 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 an AD780 (a pin-programmable,
2.5 V or 3 V, ultrahigh precision band gap reference), an ADR435
(a high precision, low noise voltage reference, providing a 5 V
reference voltage), and a AD8022 (a dual op amp used to buffer
the analog inputs). There are various link options, which are
explained in detail in Table 1.
Interfacing to this board is done through a 96-way connector.
This 96-way connector is compatible with EVAL-CONTROL-
BRD2, which is also available from Analog Devices. External
sockets are provided for the SCLK, DIN, DOUT, and CS signals;
the bipolar input signals at the AIN and the VBIASED inputs of
the two bias-up circuits; and the two analog input channels
(VIN inputs).
FUNCTIONAL BLOCK DIAGRAM
EVAL-AD7912/AD7922CB
EXTERNAL POWER
SUPPLY
VOLTAGE
REFERENCE
V_IN0
ANALOG
INPUTS _VIN1
INPUT BUFFER
V_IN0
V_IN1
V_DD
CS
SCLK
DOUT
DIN
AD7912/AD7922
VBIASED
VBIASED1
POWER SUPPLY
CIRCUIT
BIAS-UP CIRCUIT BIAS-UP CIRCUIT
AIN
AIN1
Figure 1.
CS SCLK DOUT DIN
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.
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