EVAL-AD7476/77CB

REV. 0

–3–

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.

Position

Function.

LK1

Removed

50W termination resistor is not applied to the input of the VIN circuit.

LK2

Removed

AD780 is set to provide a +2.5V reference.

LK3

Removed

50W termination resistor is not applied to the input of the bias-up circuit.

LK4

Removed

This is not relevant due to the position of LK12.

LK5

A

EVAL-CONTROL BOARD is selected as the DC bias voltage for the optional

bias-up/filter circuit.

LK6

A

+12V supplied from EVAL-CONTROL BOARD via J4.

LK7

A

-12V supplied from EVAL-CONTROL BOARD via J4.

LK8

B

SCLK signal from EVAL-CONTROL BOARD is not inverted, (for faster values

of SCLK).

LK9

B

SCLK signal from EVAL-CONTROL BOARD is not inverted, (for faster values

of SCLK).

LK10

Removed

This is not relevant due to the position of LK8 and LK9, (As 74LS04 is not in

use).

LK11

A

Ain SMB is connected to the input of the analog input buffer.

LK12

B

VDD for the AD7476/77 is supplied from the EVAL-CONTROL BOARD via J4.