Datasheet

AD2S1200/AD2S1205 User Guide UG-365
Rev. D | Page 5 of 24
Table 2. Link Options
Category Link
Default
Position Function
Interface LK1 B This link selects the source of the
CS
input signal for the AD2S1200/AD2S1205.
In Position A, the
CS
signal is taken from the externally applied signal via the J4 connector.
In Position B, the
CS
signal is taken from the SDP board via the 120-way connector.
LK2 B This link selects the source of the
SAMPLE
input signal for the AD2S1200/AD2S1205.
In Position A, the
SAMPLE
signal is taken from the externally applied signal via the J4 connector.
In Position B, the
SAMPLE
signal is taken from the SDP board via the 120-way connector.
LK3 B This link selects the source of the
RDVEL
input signal for the AD2S1200/AD2S1205.
In Position A, the
RDVEL
signal is taken from the externally applied signal via the J4 connector.
In Position B, the
RDVEL
signal is taken from the SDP board via the 120-way connector.
In Position C, the
RDVEL
signal is tied to DVDD.
In Position D, the
RDVEL
signal is tied to DGND.
LK4 B This link selects the source of the
RD
input signal for the AD2S1200/AD2S1205.
In Position A, the
RD
signal is taken from the externally applied signal via the J4 connector.
In Position B, the
RD
signal is taken from the SDP board via the 120-way connector.
LK6 A This link selects the source of the
SOE
input signal for the AD2S1200/AD2S1205.
In Position A, the
SOE
signal is tied to DVDD (parallel mode).
In Position B, the
SOE
signal is tied to DGND (serial mode).
Frequency
Selection
LK5 Not inserted
(10 kHz)
This link selects the frequency of the sinusoidal excitation signals, the EXC and
EXC
pins of
AD2S1200/AD2S1205
. The frequency of this reference signal is programmable to four standard
frequencies (10 kHz, 12 kHz, 15 kHz, or 20 kHz) using the FS1 and FS2 pins. FS1 and FS2 have
internal pull-ups.
In Position A, the FS2 signal is tied to AGND.
In Position B, the FS1 signal is tied to AGND.
Buffer Gain LK7,
LK8
C These links select the gain of the EXC and
EXC
amplifier circuits.
In Position A, the gain can be set by the user. Gain = R/10 kΩ, where R = R31 = R9.
In Position B, a gain of 1.54 is applied.
In Position C, a gain of 0.866 is applied.
Power
Supplies
LK501 A This link is used to select the source of the +12 V supply for the EVAL-AD2S1200/05SDZ.
In Position A, the +12 V supply is sourced internally from the on-board power supplies.
In Position B, the +12 V supply is sourced externally via the J500 connector.
LK701 A This link is used to select the source of the AVDD supply for the EVAL-AD2S1200/05SDZ.
In Position A, the AVDD supply is sourced internally from the on-board power supplies.
In Position B, the AVDD supply is sourced externally via the J703 connector.
LK702 A This link is used to select the source of the DVDD supply for the EVAL-AD2S1200/05SDZ.
In Position A, the DVDD supply is sourced internally from the on-board power supplies.
In Position B, the DVDD supply is sourced externally via the J701 connector.