參數資料
型號: PCM3794RHBT
廠商: TEXAS INSTRUMENTS INC
元件分類: 通信及網絡
英文描述: SPECIALTY TELECOM CIRCUIT, PQCC32
封裝: 5 X 5 MM, GREEN, PLASTIC, QFN-32
文件頁數: 33/67頁
文件大?。?/td> 1417K
代理商: PCM3794RHBT
www.ti.com
SLES193C – AUGUST 2006 – REVISED FEBRUARY 2007
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
Register 79
0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
RSV
ALV5
ALV4
ALV3
ALV2
ALV1
ALV0
Register 80
0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
RSV
ARV5
ARV4
ARV3
ARV2
ARV1
ARV0
IDX[6:0]: 100 1111b (4Fh): Register 79
IDX[6:0]: 101 0000b (50h): Register 80
ALV[5:0]: Gain Control for PG3 (R-Channel ADC Analog Input)
ARV[5:0]: Gain Control for PG4 (L-Channel ADC Analog Input)
Default value: 00
PG3 and PG4 can be independently controlled for ADC input from 30 dB to –12 dB in 1-dB steps. The ADC
output may have zipper noise while changing the level. In the PCM3793/94, the noise can be reduced when
making the change by using zero-cross detection (register 85, ZCRS).
Table 11. Gain Level Setting
ALV[5:0],
GAIN LEVEL
ALV[5:0],
GAIN LEVEL
ARV[5:0]
SETTING
ARV[5:0]
SETTING
10 1010
2A
30 dB
01 0100
14
8 dB
10 1001
29
29 dB
01 0011
13
7 dB
10 1000
28
28 dB
01 0010
12
6 dB
10 0111
27
27 dB
01 0001
11
5 dB
10 0110
26
26 dB
01 0000
10
4 dB
10 0101
25
25 dB
00 1111
0F
3 dB
10 0100
24
24 dB
00 1110
0E
2 dB
10 0011
23
23 dB
00 1101
0D
1 dB
10 0010
22
22 dB
00 1100
0C
0 dB
10 0001
21
21 dB
00 1011
0B
–1 dB
10 0000
20
20 dB
00 1010
0A
–2 dB
01 1111
1F
19 dB
00 1001
09
–3 dB
01 1110
1E
18 dB
00 1000
08
–4 dB
01 1101
1D
17 dB
00 0111
07
–5 dB
01 1100
1C
16 dB
00 0110
06
–6 dB
01 1011
1B
15 dB
00 0101
05
–7 dB
01 1010
1A
14 dB
00 0100
04
–8 dB
01 1001
19
13 dB
00 0011
03
–9 dB
01 1000
18
12 dB
00 0010
02
–10 dB
01 0111
17
11 dB
00 0001
01
–11 dB
01 0110
16
10 dB
00 0000
00
–12 dB (default)
01 0101
15
9 dB
39
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