Preliminary Technical Data
EVAL-AD7766/AD7767
Link No.
Position
Function
Default /
Packaged
Setting
A Allows the user to supply the common mode voltage from the 2.5V star point created at the 2.5V
DVDD supply. In this case eliminate the two potential dividers (R9 & R11) and (R10 & R12) which are
set by default on the AD7766/67 board. Also ensure that the resistive link R39 (underside of the PCB)
is shorted.
B
Selects the 5V output of the ADP3330-5 device (U10).
C Allows the user to apply an external common mode voltage using the SMB connector (J15) marked
“EXT_CMODE.
D Setting the link to position D allows the user to take the common mode for the ADA4841-1 amplifiers
directly from the reference supply (output of U5, either ADR425 of ADR445). For this option short
across the unpopulated resistor R34.
Rev. PrA | Page 5 of 20
