1.3 V
CLOCK
18 K
1.3 V
18 K
DATA CLOCK OSI SWOFF V
CC
+
-
V
B
= 1.3 V
V REF
=0.65V
DATA RET
-
27 K
Fig. 2 Digital Test Circuit
GP521 DIGITAL TESTING
The GP521 is tested for digital functionality via a series of
reads
and
writes
to the GP521.
For a summary of the actual testing refer to Document No. 520-35
8
7
PCS CURRENT (µA)
PCS CURRENT (µA)
6
5
4
3
2
1
0
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
PCS VOLTAGE (V)
Fig. 3 PCS Current (Sink) vs PCS Voltage at DAC
Setting 0 to 15,
I
R
= 4µA
-
+
-
DATA
-
+
+
+
GND
I
R
I
R
= 4
u
A
I
01
I
02
I
03
I
04
I
05
I
06
I
07
I
08
SWS
1
2
3
4
5
6
7
8
A
I
O
a
S9
b
1.3 V
22 K
0.5 V
+
-
+
-
0.7 V
22 K
All resistors in ohms, all capacitors
in
µF
unless otherwise stated
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
10
9
8
7
6
5
4
3
2
1
0
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
7.5
7
6.5
6
5.5
5
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0.8
PCS VOLTAGE(V)
Fig. 4 PCS Current (Sink) vs PCS Voltage
I
R
= 0 to 7.5µA (step 0.5µA) DAC set at 10
3
510 - 79 - 06
GENNUM [ GENNUM CORPORATION ]
