Analog Devices EVAL-AD7450A, Руководство пользователя

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EVAL-AD7450A/EVAL-AD7451 Evaluation Board User Guide
Rev. A | Page 8 of 28
EVALUATION BOARD HARDWARE
AD7450A / AD7451 DEVICE DESCRIPTION
The AD7450A / AD7451 are 12-bit high speed, low power,
successive approximation (SAR) analog-to-digital converters
with a fully differential/pseudo differential analog input. The
parts operate from a single 3 V or 5 V power supply and use
advanced design techniques to achieve very low power
dissipation at throughput rates up to 1 MSPS. The SAR
architecture ensures that there are no pipeline delays.
POWER SUPPLIES
Take care before applying power and signals to the evaluation
board to ensure that all link positions are as required by the
operating mode.
When using the
EVAL-AD7450ASDZ / EVAL-AD7451SDZ in
conjunction with the EVAL-SDP-CB1Z board, connect the ac
transformer to Connector J702. V
CC
, V
DD
, V
SS
, and VDRIVE are
generated on board. Alternatively, a bench power supply may
be connected to J700 to supply 7 V to 9 V.
Table 1. External Power Supply Required
Power Supply Connector Voltage Range Purpose
V
IN
1 J700 or J702 7 V to 9 V Supplies all on-board power supplies, which generate all required voltages to run the
evaluation board.
V
DD
J100 +12 V to +16.5 V Amplifier positive supply.
V
SS
J100 −12 V to −16.5 V Amplifier negative supply.
V
CC
J703 4.75 V to 5.25 V V
DD
digital supply.
1 When V
IN
is supplied, all other power supplies are available on board. If this supply is not used, then all other supplies must be sourced from an external source.