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PDF WM8980 Data sheet ( Hoja de datos )
| Número de pieza | WM8980 | |
| Descripción | STEREO CODEC WITH SPEAKER DRIVER AND BUFFER | |
| Fabricantes | Wolfson Microelectronics plc | |
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Hay una vista previa y un enlace de descarga de WM8980 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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WM8980
Stereo CODEC With Speaker Driver and Video Buffer
DESCRIPTION
FEATURES
The WM8980 is a low power, high quality stereo codec with
integrated video buffer designed for portable applications such
as Digital still camera or Digital Camcorder.
The device integrates preamps for stereo differential mics, and
includes drivers for speakers, headphone and differential or
stereo line output. External component requirements are
reduced as no separate microphone or headphone amplifiers
are required.
An integrated video buffer is provided which has programmable
gain from 0-6dB, sync-tip clamp and a 3rd order input low pass
filter for signal re-construction.
Advanced on-chip digital signal processing includes a 5-band
equaliser, a mixed signal Automatic Level Control for the
microphone or line input through the ADC as well as a purely
digital limiter function for record or playback. Additional digital
filtering options are available in the ADC path, to cater for
application filtering such as ‘wind noise reduction’.
The WM8980 CODEC can operate as a master or a slave. An
internal PLL can generate all required audio clocks for the
Codec from common reference clock frequencies, such as
12MHz and 13MHz.
The WM8980 operates at analogue supply voltages from 2.5V
to 3.3V, although the digital core can operate at voltages down
to 1.62V to save power. The speaker outputs and OUT3/4 line
outputs can run from a 5V supply if increased output power is
required. Individual sections of the chip can also be powered
down under software control.
• Stereo Codec:
• DAC SNR 98dB, THD -84dB (‘A’ weighted @ 48kHz)
• ADC SNR 90dB, THD -80dB (‘A’ weighted @ 48kHz)
• On-chip Headphone Driver with ‘capless’ option
- 40mW output power into 16Ω / 3.3V SPKVDD
• 0.9W output power into 8Ω BTL speaker / 5V SPKVDD
- Capable of driving piezo speakers
- Stereo speaker drive configuration
• Mic Preamps:
• Stereo Differential or mono microphone Interfaces
- Programmable preamp gain
- Psuedo differential inputs with common mode rejection
- Programmable ALC / Noise Gate in ADC path
• Low-noise bias supplied for electret microphones
• Other features:
• Integrated 0-6dB video buffer with LPF filter and clamp.
• Enhanced 3-D function for improved stereo separation
• Digital playback limiter
• 5-band Equaliser (record or playback)
• Programmable ADC High Pass Filter (wind noise reduction)
• Programmable ADC Notch Filter
• Aux inputs for stereo analog input signals or ‘beep’
• On-chip PLL supporting 12, 13, 19.2MHz and other clocks
• Low power, low voltage
- 2.5V to 3.6V (digital core: 1.62V to 3.6V)
- power consumption <30mW all-on with 2.5V supplies
• 6x6mm 40-pin QFN package
APPLICATIONS
• Stereo Camcorder or DSC
WOLFSON MICROELECTRONICS plc
www.wolfsonmicro.com
Product Preview, January 2005, Rev 1.6
Copyright 2005 Wolfson Microelectronics plc.
1 page  
Product Preview
WM8980
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are stress ratings only. Permanent damage to the device may be caused by continuously
operating at or beyond these limits. Device functional operating limits and guaranteed performance specifications are given
under Electrical Characteristics at the test conditions specified.
ESD Sensitive Device. This device is manufactured on a CMOS process. It is therefore generically susceptible
to damage from excessive static voltages. Proper ESD precautions must be taken during handling and storage
of this device.
Wolfson tests its package types according to IPC/JEDEC J-STD-020B for Moisture Sensitivity to determine acceptable storage
conditions prior to surface mount assembly. These levels are:
MSL1 = unlimited floor life at <30°C / 85% Relative Humidity. Not normally stored in moisture barrier bag.
MSL2 = out of bag storage for 1 year at <30°C / 60% Relative Humidity. Supplied in moisture barrier bag.
MSL3 = out of bag storage for 168 hours at <30°C / 60% Relative Humidity. Supplied in moisture barrier bag.
The Moisture Sensitivity Level for each package type is specified in Ordering Information.
CONDITION
DBVDD, DCVDD, AVDD, VBVDD supply voltages
SPKVDD supply voltage
Voltage range digital inputs
Voltage range analogue inputs
Operating temperature range, TA
Storage temperature after soldering
MIN
-0.3V
-0.3V
DGND -0.3V
AGND -0.3V
-25°C
-65°C
Notes
1. Analogue and digital grounds must always be within 0.3V of each other.
2. All digital and analogue supplies are completely independent from each other.
MAX
+3.63V
+7V
DVDD +0.3V
AVDD +0.3V
+85°C
+150°C
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Digital supply range (Core)
Digital supply range (Buffer)
Analogue core supply range
Video buffer supply range
Analogue output supply range
Ground
SYMBOL
DCVDD
DBVDD
AVDD
VBVDD
SPKVDD
DGND,AGND,
SPKGND,VBGND
TEST
CONDITIONS
MIN
TYP
MAX
UNIT
1.62 3.6 V
1.8 3.6 V
2.5 3.6 V
2.5 3.6 V
2.5 5.5 V
0V
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PP Rev 1.6 January 2005
5
5 Page 
Product Preview
SIGNAL TIMING REQUIREMENTS
SYSTEM CLOCK TIMING
MCLK
tMCLKL
tMCLKH
tMCLKY
WM8980
Figure 1 System Clock Timing Requirements
Test Conditions
DCVDD=1.8V, DBVDD=AVDD=SPKVDD=3.3V, DGND=AGND=SPKGND=0V, TA = +25oC, Slave Mode fs = 48kHz, MCLK =
256fs, 24-bit data, unless otherwise stated.
PARAMETER
System Clock Timing Information
MCLK System clock cycle time
MCLK duty cycle
SYMBOL
TMCLKY
TMCLKDS
MIN
Tbd
60:40
TYP MAX UNIT
40:60
ns
AUDIO INTERFACE TIMING – MASTER MODE
Figure 2 Digital Audio Data Timing – Master Mode (see Control Interface)
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PP Rev 1.6 January 2005
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet WM8980.PDF ] | |
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