WM8986GECO/V Wolfson Microelectronics, WM8986GECO/V Datasheet - Page 26

• 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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INPUT PGA VOLUME CONTROLS
The input microphone PGAs have a gain range from -12dB to +35.25dB in 0.75dB steps. The gain
from the LIN/RIN input to the PGA output is controlled by the register bits INPPGAVOLL[5:0] and
INPPGABVOLR[5:0]. These register bits also affect the LIP pin when LIP2INPPGA=1 and the RIP
pin when RIP2INPPGA=1.
Table 6 Input PGA Volume Control
R45 (20h)
Left channel
input PGA
volume
control
R46 (2Eh)
Right
channel
input PGA
volume
control
REGISTER
ADDRESS
5:0
6
7
8
5:0
6
7
8
BIT
INPPGAVOLL
INPPGAMUTEL
INPPGAZCL
INPPGAVU
INPPGAVOLR
INPPGAMUTER
INPPGAZCR
INPPGAVU
LABEL
010000
(0dB)
0
0
Not
latched
010000
(0dB)
0
0
Not
latched
DEFAULT
Left channel input PGA volume
000000 = -12dB
000001 = -11.25db
.
010000 = 0dB
.
111111 = +35.25dB
Mute control for left channel input PGA:
0 = Input PGA not muted, normal
operation
1 = Input PGA muted (and disconnected
from the following input BOOST stage).
Left channel input PGA zero cross
enable:
0 = Update gain when gain register
changes
1 = Update gain on 1
gain register write.
INPPGA left and INPPGA right volume
do not update until a 1 is written to
INPPGAVU (in reg 45 or 46)
(See "Volume Updates" below)
Right channel input PGA volume
000000 = -12dB
000001 = -11.25db
.
010000 = 0dB
.
111111 = +35.25dB
Mute control for right channel input
PGA:
0 = Input PGA not muted, normal
operation
1 = Input PGA muted (and disconnected
from the following input BOOST stage).
Right channel input PGA zero cross
enable:
0 = Update gain when gain register
changes
1 = Update gain on 1
gain register write.
INPPGA left and INPPGA right volume
do not update until a 1 is written to
INPPGAVU (in reg 45 or 46)
(See "Volume Updates" below)
DESCRIPTION
PD, Rev 4.1, June 2009
st
st
zero cross after
zero cross after
Production Data
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