EVAL-AD7484_15 Datasheet, PDF (5/20 Pages) Analog Devices – Evaluation Board for 3 MSPS, 14-Bit SAR ADC

EVAL-AD7484
INITIAL SETUP CONDITIONS
Care should be taken before applying power or signals to the
evaluation board to ensure that all link positions support the
required operating mode. Failure to do this could result in
damage to the evaluation board.
The positions in which all the links are set when the evaluation
board is shipped are given in Table 2. The board is also set up
for use with the EVAL-CONTROL BRD2 when shipped.
Table 2. Initial Link Positions
Link No. Position Function
LK1
B
CONVST input is connected to the 96-way connector.
LK2
A
The bias up voltage is connected to the reference voltage (divided down by R6 and R8).
LK3
IN
The 1 kΩ series input resistor on the analog input is shorted.
LK4
A
AD829 is used in the analog input bias up circuitry.
LK5
A
AD829 is used in the analog input bias up circuitry.
LK6
B
The STBY (standby) pin is connected to GND for normal operation.
LK7
B
The NAP pin is connected to GND for normal operation.
LK8
A
LK9
B
The CLIP pin is tied to DVDD. See the AD7484 data sheet for additional details.
The MODE1 input is tied to GND. See the AD7484 data sheet for additional details.
LK10
A
The MODE2 input is tied to DVDD. See the AD7484 data sheet for additional details.
LK11
IN
The AD7484 is configured for use with an external +2.5 V reference.
LK12
A
LK13
A
VDRIVE is connected to DVDD.
The AD780 is selected as the source for external reference.
LK14
IN
The reference pins are connected to the external reference source.
LK15
IN
The reference pins are connected to the external reference source.
LK16
A
LK17
A
The DVDD supply is sourced from the 96-way connector (EVAL-CONTROL BRD2).
Analog input is taken from the on-board op amps.
LK18
OUT
No 50 Ω termination on the analog input is applied to J2.
LK19
A
The VDD supply is sourced from the 96-way connector (EVAL-CONTROL BRD2).
LK20
A
The +12 V supply is sourced from the 96-way connector (EVAL-CONTROL BRD2).
LK21
A
The −12 V supply is sourced from the 96-way connector (EVAL-CONTROL BRD2).
LK22
B
CS is connected to the 96-way connector.
LK23
B
RD is connected to the 96-way connector.
LK24
B
WR is connected to the 96-way connector.
LK25
N/A
LK26
OUT
No 50 Ω termination on the analog input is applied to J3.
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