PT2256V データシートの表示（PDF） - Princeton Technology
部品番号
コンポーネント説明
メーカー
PT2256V Datasheet PDF : 19 Pages
| |||
Tel:886-2-66296288
Fax:886-2-29174598
URL:http://www.princeton.com.tw
Electronic Volume Controller IC
PT2256V
FUNCTION DESCRIPTION
ATTENUATION
The PT2256V volume control circuit consists of ladder resistors and analog switches. The Tap for
loudness function is connected to the Step 10 (-20dB). When the (3.9KΩ) resistor is connected
between LT and AGND pins, the attenuation is given in table below.
Step
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Attenuation
(dB)
0
-2
-4
-6
-8
-10
-12
-14
-16
-18
-20
-22
-24
-26
-28
-30
Step
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Attenuation
(dB)
-32
-34
-36
-38
-40
-42
-46
-50
-54
-58
-62
-66
-70
-74
-78
∞
The equivalent circuit is shown below:
OUT
IN
Step 0
Step 1
Step 2
29KΩ
Step 9
LT
Step 10
Step 11
22KΩ
Note:
1. Step 22 has an initial value of -46dB.
AGND
Step 30
Step 31
PT2256V V1.2
-4-
August, 2006
Share Link: 