Datasheet

EVAL-AD7265/AD7266
Rev. 0 | Page 12 of 24
INTERFACING THE EVALUATION BOARD TO THE
EVAL-CED1Z
Interfacing the EVAL-CED1Z board to the evaluation board is
via a 96-way connector, J1. The pinout for the J1 connector is
shown in Figure 2. Table 9 gives a description of the pins on the
96-way connector that are used to interface the EVAL-CED1Z
to the EVA L -AD7265/AD7266.
A
B
C
1 8 16 24 32
1 8 16 24 32
07921-002
Figure 2. Pin Configuration for the 96-Way Connector, J1
Table 9. The 96-Way Connector Pin Description
Signal Description
DR1PRI Data receive primary. This input is connected to the
D
OUT
A pin of the AD7265/AD7266.
DR0SEC Data receive secondary. This input is connected to the
D
OUT
B pin of the AD7265/AD7266.
RSCLK0 Receive clock. This continuous clock is connected to
the SCLK pin of the AD7265/AD7266 via LK27.
TFS0 Transmit frame sync. This output is connected to the
CS
pin of the AD7265/AD7266 via LK25 to frame the
serial data transfer.
RFS0 Receive frame sync. This input is connected to the TFS
pin on the EVAL-CED1Z to frame the serial data read.
V
DD
Analog +5 V supply. These lines are connected to the
V
DD
line on the board via LK15.
V
DRIVE
Digital +3.3 V supply. This is used to provide the V
DRIVE
supply to the board via LK17 for the digital logic.
−5 V Analog −5 V supply. This supply is not used on the
EVAL-AD7265/AD7266.
DGND Digital ground. These lines are connected to the
digital ground plane on the evaluation board.
AGND Analog ground. These lines are connected to the
analog ground plane on the evaluation board.
+12 V +12 V supply (V
CC
). This line is connected to the +12 V
supply line on the board via LK57.
−12 V −12 V supply (V
SS
). This line is connected to the −12 V
supply line on the board via LK56.
FL0 Flag zero. This output is connected to the A0 pin of
the AD7265/AD7266 via LK22.
GPIO3 General-purpose input/output. This input is connected
to the A1 pin of the AD7265/AD7266 via LK23.
Table 10. 96-Way Connector Pin Functions
1
Pin Row A Row B Row C
1 DT1PRI GPIO3 DR1PRI
2 TFS1 RFS1
3 TSCLK1 RSCLK1
4 DGND DGND DGND
5 DT0PRI DR0PRI
6 TFS0 RFS0
7 TSCLK0 RSCLK0
8 V
DRIVE
(+3.3 V) V
DRIVE
(+3.3 V) V
DRIVE
(+3.3 V)
9
10
11 DT0SEC GPIO6
12 DGND DGND DGND
13 DR0SEC
14 GPIO5 GPIO7
15 GPIO0 GPIO4
16 DGND DGND DGND
17 FL0 GPIO2
18
19 GPIO1
20 DGND DGND DGND
21 AGND AGND AGND
22 AGND AGND AGND
23 AGND AGND AGND
24 AGND AGND AGND
25 AGND AGND AGND
26 AGND AGND AGND
27 AGND
28 AGND
29 AGND AGND AGND
30 −12 V AGND +12 V
31 −5 V −5 V −5 V
32 V
DD
(+5 V) V
DD
(+5 V) V
DD
(+5 V)
1
The unused pins of the 96-way connector are not shown.
TEST POINTS
There are two test points on the inputs to the AD7265/AD7266
on the evaluation board. Test points enable the user to have easy
access to various signals on the EVAl-AD7265/AD7266, facilitat-
ing probing, evaluation, and debugging.