WM8985GEFL Wolfson Microelectronics, WM8985GEFL Datasheet - Page 44

• Manufacturer Part Number: WM8985GEFL
• Description: Audio CODECs Multimedia CODEC with Class D HP
• Manufacturer: Wolfson Microelectronics

Specifications of WM8985GEFL

• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-32
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8985
w
R34 (22h)
ALC Control
3
REGISTER
ADDRESS
8
7:4
3:0
BIT
[3:0]
ALCMODE
ALCDCY
[3:0]
ALCATK
[3:0]
LABEL
(0ms)
0
0011
(13ms/6dB)
0011
(2.9ms/6dB)
0010
(832us/6dB)
0010
(182us/6dB)
DEFAULT
increased.
0000 = 0ms
0001 = 2.67ms
0010 = 5.33ms
0011 = 10.66ms
0100 = 21.32ms
0101 = 42.64ms
0110 = 85.28ms
0111 = 0.17s
1000 = 0.34s
1001 = 0.68s
1010 or higher = 1.36s
Determines the ALC mode of
operation:
0 = ALC mode (Normal Operation)
1 = Limiter mode.
Decay (gain ramp-up) time
(ALCMODE ==0)
0000
0001
0010
… (time doubles with every step)
1010
or
higher
Decay (gain ramp-up) time
(ALCMODE ==1)
0000
0001
0010
… (time doubles with every step)
1010
ALC attack (gain ramp-down) time
(ALCMODE == 0)
0000
0001
0010
… (time doubles with every step)
1010
or
higher
ALC attack (gain ramp-down) time
(ALCMODE == 1)
0000
0001
0010
Per
step
410us
820us
1.64ms
420ms
Per
step
90.8us
181.6us
363.2us
93ms
Per
step
104us
208us
416us
106ms
Per
step
22.7us
45.4us
90.8us
DESCRIPTION
PD, Rev 4.6, July 2009
Per
6dB
3.3ms
6.6ms
13.1ms
3.36s
Per
6dB
726.4us
1.453ms
2.905ms
744ms
Per
6dB
832us
1.66ms
3.32ms
852ms
Per
6dB
182.4us
363.2us
726.4us
Production Data
90% of
range
24ms
48ms
192ms
24.576s
90% of
range
10.53
ms
21.06
ms
90% of
range
6ms
12ms
90% of
range
5.26ms
5.39s
24.1ms
6.18s
1.31ms
2.62ms
5.26ms
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