UG-949
EVAL-AD7761FMCZ User Guide
Rev. 0 | Page 6 of 17
Link No.
Default Option
Description
SL7
A
Pin 17: ST1/SCLK.
Position A: SCLK in SPI mode.
Position B: Channel 4 to Channel 7 in standby mode (pin mode).
Position C: Channel 4 to Channel 7 enabled (pin mode).
SL8
A
Pin 18: DEC1/SDI.
Position A: SDI in SPI mode.
Position B: IOVDD.
Position C: GND.
SL9
A
Pin 19: DEC0/SDO.
Position A: SDO in SPI mode.
Position B: IOVDD.
Position C: GND.
SL10
A
Pin 12: MODE0/GPIO0.
Position A: GPIO to SDP.
Position B: GND.
Position C: IOVDD.
SL11
A
Pin 13: MODE1/GPIO1.
Position A: GPIO to SDP.
Position B: GND.
Position C: IOVDD.
SL12
A
Pin 14: MODE2/GPIO2.
Position A: GPIO to SDP.
Position B: GND.
Position C: IOVDD.
SL13
A
Pin 15: MODE3/GPIO3.
Position A: GPIO to SDP.
Position B: GND.
Position C: IOVDD.
SL14
A
Pin configuration mode. The
AD7761
evaluation kit software runs from SPI mode; select the filter
via the register map. This link selects the filter mode (only available in pin mode).
Position A: GPIO4.
Position B: sinc5 fast settling filter.
Position C: wideband low ripple filter.
SL15
A
Select common-mode voltage to bias input signals to one of the following:.
Position A:
OP2177
buffered VCM output.
Position B: VCM output from the
AD7761
.
SL16
B
Select reference path from the
ADR444
to REFX+.
Position A: bypass the external reference buffer.
Position B:
ADR444
input into the
ADA4841-1
reference buffer.
SL17
B
Select reference path from the
ADR444
to REFX+.
Position A: bypass the external reference buffer.
Position B: select output from the
ADA4841-1
reference buffer.
SL18
Unsoldered
Shorts IOVDD to DREGCAP, only for IOVDD = 1.8 V operation; see the
AD7761
data sheet.
SL19
A
External common mode buffer input selection.
Position A:
AD7761
VCM pin.
Position B: AVDD1 is used for common-mode selection, R166 (0 Ω) and R167 (not inserted) can be
used as voltage dividers.
SL22, SL23
Selects the output from Channel 5 amplifier driver option.
Position A:
ADA4896-2
.
Position B: bypass the driver.
Position C: amplifier driver board header via the J11 and J12 connectors.
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