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WM8976CGEFL/V Datasheet(PDF) 96 Page - Wolfson Microelectronics plc

No. de pieza WM8976CGEFL/V
Descripción Electrónicos  Stereo CODEC with Speaker Driver
PDF  114 Pages
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Fabricante Electrónico  WOLFSON [Wolfson Microelectronics plc]
Página de inicio  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8976CGEFL/V Datasheet(HTML) 96 Page - Wolfson Microelectronics plc

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WM8976
Production Data
w
PD, Rev 4.5, November 2011
96
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
2:0
ALCMINGAIN
000
Set minimum gain of PGA
000=-12dB
001=-6dB
010=0dB
011=+6dB
100=+12dB
101=+18dB
110=+24dB
111=+30dB
Input Limiter/
Automatic
Level Control
(ALC)
33 (21h)
8
0
Reserved
7:4
ALCHLD
0000
ALC hold time before gain is increased.
0000 = 0ms
0001 = 2.67ms
0010 = 5.33ms
… (time doubles with every step)
1010 or higher = 1.36s
Input Limiter/
Automatic
Level Control
(ALC)
3:0
ALCLVL
1011
ALC target – sets signal level at ADC input
1111 : -1.5dBFS
1110 : -1.5dBFS
1101 : -3dBFS
1100 : -4.5management...... (-1.5dB steps)
0001 : -21dBFS
0000 : -22.5dBFS
Input Limiter/
Automatic
Level Control
(ALC)
34 (22h)
8
ALCMODE
0
Determines the ALC mode of operation:
0=ALC mode
1=Limiter mode
Input Limiter/
Automatic
Level Control
(ALC)
7:4
ALCDCY
[3:0]
0011
Decay (gain ramp-up) time
(ALCMODE ==0)
Input Limiter/
Automatic
Level Control
(ALC)
Per step
Per 6dB
90% of
range
0000
410us
3.28ms
23.6ms
0001
820us
6.6ms
47.2ms
0010
1.64ms
13.1ms
94.5ms
… (time doubles with every step)
1010 or
higher
420ms
3.36s
24.2s
0011
Decay (gain ramp-up) time
(ALCMODE ==1)
Per step
Per 6dB
90% of
range
0000
90.8us
726us
5.23ms
0001
182us
1.45ms
10.5ms
0010
363us
2.91ms
20.9ms
… (time doubles with every step)
1010
93ms
744ms
5.36s
3:0
ALCATK
0010
ALC attack (gain ramp-down) time
(ALCMODE == 0)
Input Limiter/
Automatic
Level Control
(ALC)
Per step
Per 6dB
90% of
range
0000
104us
832us
6ms
0001
208us
1.66ms
12ms
0010
416us
3.33ms
24.1ms



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