WM8986GECO/V Wolfson Microelectronics, WM8986GECO/V Datasheet - Page 30

• Manufacturer Part Number: WM8986GECO/V
• Description: Audio Amplifiers Class D Headphone DAC + Line Out
• Manufacturer: Wolfson Microelectronics

Specifications of WM8986GECO/V

• Product: Class-D
• Output Power: 40 mW
• Thd Plus Noise: - 86 dB
• Operating Supply Voltage: 1.71 V to 3.6 V, 2.5 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Audio Load Resistance: 16 Ohms
• Minimum Operating Temperature: - 40 C
• Output Signal Type: Differential
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 1.71 V, 2.5 V
• Output Type: Differential
• Package / Case: QFN-28
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8986
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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).
Table 7 Input BOOST Stage Control
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.
Table 8 Input BOOST Stage Control
R47 (2Fh)
Left Input
BOOST
control
R48 (30h)
Right Input
BOOST
control
R47 (2Fh)
Left channel
Input BOOST
control
R48 (30h)
Right channel
Input BOOST
control
REGISTER
REGISTER
ADDRESS
ADDRESS
8
8
2:0
2:0
BIT
BIT
PGABOOSTL
PGABOOSTR
AUXL2BOOSTVOL
AUXR2BOOSTVOL
LABEL
LABEL
1
1
DEFAULT
000
000
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
Controls the auxiliary amplifier to
the left channel input boost stage:
000 = Path disabled
(disconnected)
001 = -12dB gain
010 = -9dB gain
011 = -6dB gain
100 = -3dB gain
101 = +0dB gain
110 = +3dB gain
111 = +6dB gain
Controls the auxiliary amplifier to
the right channel input boost
stage:
000 = Path disabled
(disconnected)
001 = -12dB gain
010 = -9dB gain
011 = -6dB gain
100 = -3dB gain
101 = +0dB gain
110 = +3dB gain
111 = +6dB gain
DESCRIPTION
DESCRIPTION
PD, Rev 4.1, June 2009
Production Data
30