WM8985GEFL Wolfson Microelectronics, WM8985GEFL Datasheet - Page 35

• 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
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Table 8 Input BOOST Stage Control
The input PGA paths can have a +20dB boost (PGABOOSTL/R=1), a 0dB pass through
(PGABOOSTL/R=0) or be completely isolated from the input boost circuit (INPPGAMUTEL/R=1).
The Auxiliary amplifier path to the BOOST stages is controlled by the AUXL2BOOSTVOL[2:0] and
AUXR2BOOSTVOL[2:0] register bits. When AUXL2BOOSTVOL/AUXR2BOOSTVOL=000 this path
is completely disconnected from the BOOST stage. Settings 001 through to 111 control the gain in
3dB steps from -12dB to +6dB.
The L2/R2 path to the BOOST stage is controlled by the LIP2BOOSTVOL[2:0] and the
RIP2BOOSTVOL[2:0] register bits.
the L2/R2 input pin is completely disconnected from the BOOST stage. Settings 001 through to 111
control the gain in 3dB steps from -12dB to +6dB.
R47 (2Fh)
Left Input
BOOST
control
R48 (30h)
Right Input
BOOST
control
REGISTER
ADDRESS
8
8
BIT
PGABOOSTL
PGABOOSTR
LABEL
When L2_2BOOSTVOL[6:4] and R2_2BOOSTVOL[6:4]=000
1
1
DEFAULT
PGA:
0 = PGA output has +0dB gain
through input BOOST stage.
1 = PGA output has +20dB gain
through input BOOST stage.
PGA:
0 = PGA output has +0dB gain
through input BOOST stage.
1 = PGA output has +20dB gain
through input BOOST stage.
Boost enable for left channel input
Boost enable for right channel input
DESCRIPTION
PD, Rev 4.6, July 2009
WM8985
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