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PDF WM9094 Data sheet ( Hoja de datos )
| Número de pieza | WM9094 | |
| Descripción | Ultra Low Power Audio Subsystem | |
| Fabricantes | Wolfson Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de WM9094 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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WM9094
Ultra Low Power Audio Subsystem
DESCRIPTION
The WM9094[1] is a high performance low power audio
subsystem, including headphone driver and Class AB/D
earpiece/speaker driver. The Class D speaker driver
supports 650mW output power at 3.6V, 1%THD.
The unique dual mode charge pump architecture provides
ground referenced headphone outputs removing the
requirement for external coupling capacitors. Class G
technology is integrated to increase the efficiency and
extend playback time by optimizing the headphone driver
supply voltages according to the volume control.
The flexible input configuration allows single ended or
differential stereo inputs. Mixers allow highly flexible routing
to the outputs. A ‘Voice Bypass’ path is also available for
low-power voice applications.
The WM9094 is controlled using a two-wire I2C interface.
An integrated oscillator generates all internal clocks,
removing the need to provide any external clock.
Separate mixer and volume controls are provided for each
headphone and speaker driver. Automatic Gain Control
limits the speaker output signal in order to prevent clipping.
DC offset correction to less than 1mV guarantees a
pop/click-free headphone start up.
The WM9094 is available in a 2.0mm x 2.5mm 20-bump
CSP package.
BLOCK DIAGRAM
FEATURES
Mono Class D speaker driver
- 2W at 5V SVDD @1%THD+N into 4Ω
- 650mW at 3.6V SVDD @1%THD+N into 8Ω
- 92dB SNR
Ground referenced stereo headphone driver
- 34mW into 16Ω load @ 1% THD+N
- 96dB SNR
- 80dB THD+N
Mono Class AB earpiece driver
- 40mW into 8Ω load
Differential and single ended analogue input configurations
- Compatible with ground-referenced audio sources
Integrated oscillator for clocking requirements
I2C 2-wire software control interface
Automatic gain control (AGC) for Class D speaker output
Pop and click suppression, < 1mV DC offset
<50ms start up time
Excellent RF and TDMA noise immunity
Ultra low power consumption
- 4mW quiescent for headphone driver
- 5mW quiescent for speaker driver (Class D)
Shutdown current < 1uA
Supply voltage
- SVDD = 2.7V to 5.5V
- HPVDD = 1.8V
1.8V to 2.7V control interface compatibility
20-bump CSP package
APPLICATIONS
Mobile handsets
WOLFSON MICROELECTRONICS plc
[1] This product is protected by Patents US 7,622,984 and US 7,626,445
Production Data, March 2013, Rev 4.0
Copyright 2013 Wolfson Microelectronics plc
1 page  
Production Data
PIN DESCRIPTION
PIN NO
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
C1
C2
C3
C4
C5
D1
D2
D3
D4
D5
NAME
HPR
HPL
CPVSS
CP
CN
BIAS
SDA
SCL
HPVDD
CPVDD
IN1+
IN1-
IN3+
GND
OUT+
IN2+
IN2-
IN3-
SVDD
OUT-
TYPE
Analogue Output
Analogue Output
Analogue Output
Analogue Output
Analogue Output
Analogue Output
Digital Input / Output
Digital Input
Supply
Analogue Output
Analogue Input
Analogue Input
Analogue Input
Supply
Analogue Output
Analogue Input
Analogue Input
Analogue Input
Supply
Analogue Output
DESCRIPTION
Right headphone output
Left headphone output
Charge pump negative rail decoupling pin
Charge pump flyback capacitor pin
Charge pump flyback capacitor pin
Mid-rail voltage decoupling pin
Control interface data
Control interface clock
Analogue supply
Charge pump positive rail decoupling pin
IN1 positive analogue input
IN1 negative analogue input
Positive analogue input for bypass path
Ground for speaker and charge pump
Speaker positive output
IN2 positive analogue input
IN2 negative analogue input
Negative analogue input for bypass path
Speaker supply
Speaker negative output
WM9094
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PD, March 2013, Rev 4.0
5
5 Page 
Production Data
PERFORMANCE PLOTS
WM9094
WM9094
WM9094
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PD, March 2013, Rev 4.0
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet WM9094.PDF ] | |
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