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PDF WM8991 Data sheet ( Hoja de datos )
| Número de pieza | WM8991 | |
| Descripción | Mobile Multimedia CODEC | |
| Fabricantes | Wolfson Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de WM8991 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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WM8991
Mobile Multimedia CODEC with
Dual-Mode Class AB/D Speaker Driver
DESCRIPTION
FEATURES
The WM8991 is a highly integrated ultra-low power hi-fi codec
designed for handsets rich in multimedia features such as
mobile TV, digital audio playback and gaming. Ultra-low power
and low noise interfaces to many other audio components in the
system are provided.
A powerful 1W speaker driver can operate in class D or AB
modes, providing total flexibility to the system designer. Low
leakage, high PSRR and pop/click suppression enable direct
battery connection for the speaker supply.
A very highly flexible input configuration supports multiple
microphone or line inputs (mono or stereo, single-ended or
differential).
Four headphone drivers support fully differential headset drive,
providing excellent crosstalk performance and bass response,
maximising stereo effects, and allowing the removal of large
and expensive headphone capacitors.
Stereo 24-bit sigma-delta ADCs and DACs provide hi-fi quality
audio record and playback, with a flexible digital audio interface
supporting most commonly-used clocking schemes. An
integrated low power PLL, an alternative DAC interface and
TDM support provide additional flexibility.
The WM8991 is supplied in very small and thin 5x5mm 65-ball
BGA package, ideal for use in portable systems.
DAC SNR 99dB (‘A’ weighted), THD -84dB at 48kHz, 3.3V
ADC SNR 94dB (‘A’ weighted), THD -82dB at 48kHz, 3.3V
Microphone interface (Up to four differential microphones)
1W Speaker driver
- 1W into 8Ω BTL speaker at <0.1% THD
- 80dB PSRR @217Hz
- <1uA leakage with direct battery connection
- Software-selectable class D or AB mode
- Filterless connection supported
- Pop/Click suppression
Headphone / ear speaker drivers
- 40mW output power into 16Ω at 3.3V
- Fully differential and capless modes supported
- Pop/Click suppression
4 Mono or stereo differential line outputs
Powerful GPIO functions
Ultra-low power consumption
- 8.3mW analogue voice call
- 13.7mW DAC playback to headphones
On-chip PLL provides flexible clocking scheme
Sample rates: 8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48kHz
65-ball 5x5mm BGA package
APPLICATIONS
Multimedia phones
GPS
WOLFSON MICROELECTRONICS plc
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Pre-Production, May 2008, Rev 3.1
Copyright ©2008 Wolfson Microelectronics plc
1 page  
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Pre-Production
PIN CONFIGURATION
WM8991
123456789
A AVDD
HPVDD
HPVDD
HPGND
HPGND
AGND
SPK
VDD
SPK
VDD
SPKP
B
AVDD
ROUT
OUT4
OUT3
LOUT
AGND
VMID
MIC
BIAS
SPKP
C LIN3/
GPI7
LIN4/
RXN
SPK
GND
SPKN
D LIN1
LIN2
AGND
AGND
AGND
SPK
GND
SPKN
E RIN1
RIN2
AGND
AGND
AGND
LON
LOP
F RIN3/
GPI8
RIN4/
RXP
G DGND
DGND
AGND
AGND
AGND
RON
ROP
MODE
SCLK
H DCVDD
NC
J DBVDD
MCLK
NC
BCLK
ADC
LRC/
GPIO1
ADC
DAT
DAC
LRC
DAC
DAT
GPIO3/
BCLK2
GPIO2/
MCLK2
GPIO5/
DAC
DAT2
GPIO4/
DAC
LRC2
SDIN
GPIO6/
ADC
LRCB
CSB/
ADDR
N/C
ORDERING INFORMATION
ORDER CODE TEMPERATURE RANGE
PACKAGE
WM8991GEB/V
WM8991GEB/RV
Note:
Reel quantity = 3500
-40°C to +85°C
-40°C to +85°C
65-ball BGA
(Pb-free)
65-ball BGA
(Pb-free, Tape and reel)
MOISTURE
SENSITIVITY LEVEL
MSL3
MSL3
PEAK SOLDERING
TEMPERATURE
260°C
260°C
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PP, May 2008, Rev 3.1
5
5 Page 
Pre-Production
www.DataSheet4U.com
CLASS AB DE-RATING CURVE
The de-rating curves shown in Figure 3 are based on a full scale sinusoidal input
WM8991
P
[W]
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
SPKVDD = 5.5V SPKVDD = 5V SPKVDD = 4.2V
SPKVDD = 3.6V
SPKVDD = 3.3V
SPKVDD = 3V
SPKVDD = 2.7V
55 60 65 70 75 80 85
Figure 3 Class AB Speaker Power De-Rating Curve
T
[ºC]
w
PP, May 2008, Rev 3.1
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet WM8991.PDF ] | |
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