wm9081 Wolfson Microelectronics plc, wm9081 Datasheet - Page 50
wm9081
Manufacturer Part Number
wm9081
Description
Mono Dac With 2.6w Class Ab/d Speaker Driver, Dynamic Range Controller And Retune Mobile Parametric Equalizer
Manufacturer
Wolfson Microelectronics plc
Datasheet
1.WM9081.pdf
(109 pages)
- Current page: 50 of 109
- Download datasheet (2Mb)
WM9081
w
Table 28 DC gain and AC gain
The speaker mode select and the speaker gain controls are described in Table 29. Note that the BTL
output configuration provides an additional 6dB gain.
Table 29 Speaker Output Control
LINE OUTPUT CONFIGURATION
The line output, LINEOUT, provides a single-ended analogue output for connection to other circuits.
Note that the line output is referenced to VMID, and external DC-blocking capacitors are required
when connecting this output to other devices.
The line output is enabled and controlled using the registers described in the “Output Signal Path”
section.
DC GAIN = AC GAIN
R9 (09h)
Analogue
Speaker 1
R10 (0Ah)
Analogue
Speaker 2
REGISTER
ADDRESS
DC GAIN [5:3] AND AC GAIN [2:0] FROM OUTPUT MIXER
110 – 111
000
001
010
011
100
101
OUTPUT TO SPEAKER AMP INPUT
BIT
5:3
2:0
6
SPK_DCGAIN
[2:0]
SPK_ACGAIN [2:0]
SPK_MODE
Gain [dB]
Reserved
LABEL
2.1
2.9
3.6
4.5
5.1
0
DEFAULT
(+3.6dB)
(+3.6dB)
011
011
0
Reserved
1.00x
1.27x
1.40x
1.52x
1.67x
Gain
1.8x
Speaker Output DC Gain
000 = x1 boost (0dB)
001 = x1.27 boost(2.1dB)
010 = x1.4 boost (2.9dB)
011 = x1.52 boost (3.6dB)
100 = x1.67 boost (4.5dB)
101 = x1.8 boost (5.1dB)
110-111 = Reserved
Speaker Output AC Gain
000 = x1 boost (0dB)
001 = x1.27 boost(2.1dB)
010 = x1.4 boost (2.9dB)
011 = x1.52 boost (3.6dB)
100 = x1.67 boost (4.5dB)
101 = x1.8 boost (5.1dB)
110-111 = Reserved
Speaker Mode Select
0 = Class D mode
1 = Class AB mode
DESCRIPTION
PP, Rev 3.0, April 2009
Pre-Production
50
Related parts for wm9081
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
24-bit, 192khz 6-channel Dac With Volume Control
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
24-bit, 192khz 6-channel Dac
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
HI FI AND TELEPHONY DUAL CODEC
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
Stereo Codec Portable Audio Applications
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
Stereo Codec For Portable Audio Applications
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
Multichannel Codec With S/pdif Transceiver
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
Ac97 Audio Codec Mixer With Integrated Headphone Driver
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
Ac-link Interface Audio Dac
Manufacturer:
Wolfson Microelectronics plc
Datasheet: