GP521 Datasheet, PDF (3/8 Pages) Gennum Corporation – General Purpose Controller / Memory Chip for Hearing Instruments

CLOCK
1.3 V
18 K
+
-
V_B = 1.3 V
DATA
V _REF
=0.65V
DATA RET ⁺
-
1.3 V
18 K
DATA CLOCK OSI SWOFF V_CC GND ^IR
I 01 I 02 I 03 I 04 I₀₅ I ₀₆ I ₀₇ I ₀₈
I _R = 4 uA
SWS 1 2 3 4 5 6 7 8
1.3 V
A
I_O
S9
a
b
27 K
22 K
0.5 V
+
-
+ _{0.7 V}
-
22 K
All resistors in ohms, all capacitors
in µF unless otherwise stated
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
15
7
14
13
6
12
11
5
10
9
4
8
7
3
6
5
2
4
3
1
2
1
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
PCS VOLTAGE (V)
Fig. 3 PCS Current (Sink) vs PCS Voltage at DAC
Setting 0 to 15, I_R = 4µA
10
7.5
9
7
6.5
8
6
7
5.5
5
6
4.5
5
4
3.5
4
3
3
2.5
2
2
1.5
1
1
0.5
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 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
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