WM8940GEFL/V Wolfson Microelectronics, WM8940GEFL/V Datasheet - Page 34

Audio CODECs Mono CODEC with Speaker Driver

WM8940GEFL/V

Manufacturer Part Number
WM8940GEFL/V
Description
Audio CODECs Mono CODEC with Speaker Driver
Manufacturer
Wolfson Microelectronics
Datasheet

Specifications of WM8940GEFL/V

Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
QFN-24
Minimum Operating Temperature
- 25 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
WM8940
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MINIMUM AND MAXIMUM GAIN
Table 23 ALC Max/Min Gain
Figure 14 ALC Min/Max Gain
Table 24 ALC Max Gain Values
The ALCMIN and ALCMAX register bits set the minimum/maximum gain value that the PGA can be
set to whilst under the control of the ALC. This has no effect on the PGA when ALC is not enabled.
In normal mode, ALCMAX sets the maximum boost which can be applied to the signal. In limiter
mode, ALCMAX will normally have no effect (assuming the starting gain value is less than the
maximum gain specified by ALCMAX) because the maximum gain is set at the starting gain level.
ALCMIN sets the minimum gain value which can be applied to the signal.
ALCMAX
111
110
101
100
011
010
001
000
R32
ALC Control 1 2:0
REGISTER
ADDRESS
5:3
Maximum Gain (dB)
BIT
ALCMAX
ALCMIN
35.25
29.25
23.25
17.25
11.25
-0.75
-6.75
5.25
LABEL
111
000
DEFAULT
Set Maximum Gain of PGA
Set minimum gain of PGA
DESCRIPTION
PD, Rev 4.2, April 2008
Production Data
34

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