EVAL-AD7475 Datasheet, PDF (3/13 Pages) Analog Devices – Evaluation Board for 1MSPS, 12-Bit ADC

EVAL-AD7475/AD7495CB
SET-UP CONDITIONS
Care should be taken before applying power and signals to the evaluation board to ensure that all link positions are
as per the required operating mode. Table I shows the position in which all the links are set when the evaluation
board is sent out.
Table I. Initial Link and Switch Positions
Link No.
LK1
Position
A
Function.
Ain is tied to the input of the AD711 buffer op-amp.
LK2
removed
AD780 is set to provide a + 2.5 V reference.
LK3
A
removed
The on-board AD780 voltage reference supplies the REFIN pin of the AD7475.
The internal + 2.5V reference on the AD7495 is used on the AD7495 control
board
LK4
B
V_DD (+5V) supplied by the EVALUATION-BOARD CONTROLLER via J5.
LK5
A
VDRIVE pin of the AD7475/AD7495 is connected to V_DD (+5V)
LK6
A
+12V supplied from EVAL-CONTROL BOARD via J5.
LK7
A
-12V supplied from EVAL-CONTROL BOARD via J5.
LK8
A
Vref is chosen as the dc bias voltage for the bias-up circuit.
LK9
removed
50 Ohm termination is not selected.
LK10
removed
50 Ohm termination is not selected.
LK11, LK12 B
SCLK signal from EVALUATION-BOARD CONTROLLER is not inverted, (for
faster values of SCLK).
REV. 0
–3–