Cirrus Logic AN44 - Manual (Page 5)

Figures 4, 5 and 6. The digital interface circuitry
for the CS5102A is show in Figure 5.
Figure 6 is the way the digital circuitry is
implemented on the modified serial cable.
Figure 7 is the hardware implementation of the
modified serial cable shown in Figure 6. In this
example, the embedded system is designed with
a test connector. The modified serial cable is
built with a connector which mates to the system
test connector. The test connector provides a
convenient and reliable means of interfacing the
ADC.
U2-C
3
1
2
U2A
8
9
10
11
12
13
+5V
U3B
R1
10k
JP1
BOTH
CH2
CH1
Q
D
S
R
P2
+ C3
10 µ F
+5V
+5V
SLATCH
SCLK
SDATA
U2-B
U2B
10
R3
+ C2
0.1 µ F
+ C1
0.1 µ F
4
5
6
8
10
9
11 13
12
SDATA
SCLK
+5V
SSH/SDL
TRK2
TRK1
GND
P1
74HC00
74HC74
6
5
4
3
2
1
+5V
U3A
Q
D
S
R
Figure 6. Modified Serial Cable Implementation of the Digital Interface
Figure 7. Construction of the Modified Serial Cable
Using The CDBCapture System with Embedded A/D Converters
AN44REV2 5