WM8983GEFL/RV Wolfson Microelectronics, WM8983GEFL/RV Datasheet - Page 58

• Manufacturer Part Number: WM8983GEFL/RV
• Description: Audio CODECs Mbl Multimedia CODEC w/ 1W Speaker Driver
• Manufacturer: Wolfson Microelectronics

Specifications of WM8983GEFL/RV

• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-32
• Minimum Operating Temperature: - 25 C

WM8983
w
Table 30 DAC Digital Volume Control
Note: An additional gain of up to 12dB can be added using the gain block embedded in the
digital peak limiter circuit (see DAC OUTPUT LIMITER section).
5-BAND EQUALISER
3-D ENHANCEMENT
DAC DIGITAL OUTPUT LIMITER
A 5-band graphic equaliser function which can be used to change the output frequency levels to suit
the environment. This can be applied to the ADC or DAC path and is described in the 5-BAND
EQUALISER section for further details on this feature.
The WM8983 has an advanced digital 3-D enhancement feature which can be used to vary the
perceived stereo separation of the left and right channels. Like the 5-band equaliser this feature can
be applied to either the ADC record path or the DAC plaback path but not both simultaneously.
Refer to the 3-D STEREO ENHANCEMENT section for further details on this feature.
The WM8983 has a digital output limiter function. The operation of this is shown in Figure 31. In
this diagram the upper graph shows the envelope of the input/output signals and the lower graph
shows the gain characteristic.
R11
Left DAC
Digital Volume
R12
Right DAC
Digital Volume
REGISTER
ADDRESS
7:0
8
7:0
8
BIT
DACLVOL
[7:0]
DACVU
DACRVOL
[7:0]
DACVU
LABEL
11111111
( 0dB )
Not
latched
11111111
( 0dB )
Not
latched
DEFAULT
Left DAC Digital Volume Control
0000 0000 = Digital Mute
0000 0001 = -127dB
0000 0010 = -126.5dB
... 0.5dB steps up to
1111 1111 = 0dB
DAC left and DAC right volume do
not update until a 1 is written to
DACVU (in reg 11 or 12)
Right DAC Digital Volume Control
0000 0000 = Digital Mute
0000 0001 = -127dB
0000 0010 = -126.5dB
... 0.5dB steps up to
1111 1111 = 0dB
DAC left and DAC right volume do
not update until a 1 is written to
DACVU (in reg 11 or 12)
DESCRIPTION
PD Rev 4.0 November 2006
Production Data
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