SC9235 Datasheet, PDF (4/9 Pages) Silan Microelectronics Joint-stock – ELECTRONIC VOLUME

Silan
Semiconductors
SC9235
FUNCTION DESCRIPTION
1. VOLUME CIRCUIT
Volume circuit consist of ladder resistor and analog switch.
Tap for loudness is connected to step 10 (20dB).
Attenuation is as follows when resistor (3.9kΩ) is connected between TP pin and pin.
* Equivalence circuit
OUT
IN
S0
S1
S2
28.5kΩ
S9
TP
S10
S11
20.25kΩ
S30
GND
S31
* Volume step and attenuation
(Attenuation is as follows when resistor (3.9kΩ) is
connected between TP pin and GND pin.)
Step Attenuation Step Attenuation
0
0(dB)
16
32(dB)
1
2
17
34
2
4
18
36
3
6
19
38
4
8
20
40
5
10
21
42
6
12
*22
46
7
14
23
50
8
16
24
54
9
18
25
58
10
20
26
62
11
22
27
66
12
24
28
70
13
26
29
74
14
28
30
78
15
30
31
∞
* Step 22 (46dB) initial value.
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
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