WM8985GEFL Wolfson Microelectronics, WM8985GEFL Datasheet - Page 103

• 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

Production Data
w
29 (1Dh)
30 (1Eh)
32 (20h)
33 (21h)
REGISTER
ADDRESS
8
7
6:0
8
7
6:0
8:7
6
5:3
2:0
7:4
3:0
BIT
NFU
NFA1[13:7]
NFU
NFA1[6:0]
ALCSEL
ALCMAXGAIN
ALCMINGAIN
ALCHLD
ALCLVL
LABEL
0
0
0000000
0
0
0000000
00
0
111
000
0000
1011
DEFAULT
Notch filter update. The notch filter values used
internally only update when one of the NFU bits
is set high.
Reserved. Initialise to 0
Notch Filter a1 coefficient, bits [13:7]
Notch filter update. The notch filter values used
internally only update when one of the NFU bits
is set high.
Reserved. Initialise to 0
Notch Filter a1 coefficient, bits [6:0]
ALC function select:
00=ALC off
01=ALC right only
10=ALC left only
11=ALC both on
Reserved. Initialise to 0
Set Maximum Gain of PGA
111=+35.25dB
110=+29.25dB
101=+23.25dB
100=+17.25dB
011=+11.25dB
010=+5.25dB
001=-0.75dB
000=-6.75dB
Set minimum gain of PGA
000=-12dB
001=-6dB
010=0dB
011=+6dB
100=+12dB
101=+18dB
110=+24dB
111=+30dB
ALC hold time before gain is increased.
0000 = 0ms
0001 = 2.67ms
0010 = 5.33ms
… (time doubles with every step)
1111 = 43.691s
ALC target – sets signal level at ADC input
1111 : -1.5dBFS
1110 : -1.5dBFS
1101 : -3dBFS
1100 : -4.5I...... (-1.5dB steps)
0001 : -21dBFS
0000 : -22.5dBFS
DESCRIPTION
PD, Rev 4.6, July 2009
Analogue to
Digital
Converter
(ADC)
Analogue to
Digital
Converter
(ADC)
Analogue to
Digital
Converter
(ADC)
Analogue to
Digital
Converter
(ADC)
Input Limiter/
Automatic
Level Control
(ALC)
Input Limiter/
Automatic
Level Control
(ALC)
Input Limiter/
Automatic
Level Control
(ALC)
Input Limiter/
Automatic
Level Control
(ALC)
Input Limiter/
Automatic
Level Control
(ALC)
REFER TO
WM8985
103