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PDF WM8985 Data sheet ( Hoja de datos )
| Número de pieza | WM8985 | |
| Descripción | Multimedia CODEC | |
| Fabricantes | Wolfson Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de WM8985 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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WM8985
Multimedia CODEC with Class D Headphone and Line Out
DESCRIPTION
FEATURES
The WM8985 is a low power, high quality, feature-rich stereo
CODEC designed for portable multimedia applications that
require low power consumption and high quality audio.
The device integrates preamps for stereo differential mics, and
includes class D and class AB drivers for headphone and
differential or stereo line output. External component
requirements are reduced as no separate microphone or
headphone amplifiers are required.
Advanced DSP features include a 5-band equaliser, an
ALC/limiter for the microphone or line input through the ADC
and a digital playback limiter. Additional digital filtering options
are available in the ADC path, to cater for application filtering
such as ‘wind noise reduction’ and a programmable notch filter.
Highly flexible mixers enable many new application features,
with the option to record and playback any combination of voice,
line inputs and digital audio such as FM Radio or MP3.
The WM8985 digital audio interface can operate in master or
slave mode, while an integrated PLL provides flexible clocking
schemes.
The WM8985 operates at analogue supply voltages from 2.5V to
3.3V, although the digital core can operate at voltages down to
1.71V to save power. Additional power management control
enables individual sections of the chip to be powered down
under software control.
Stereo CODEC:
DAC SNR 98dB, THD -84dB (‘A’ weighted @ 48kHz)
ADC SNR 92.5dB, THD -83dB (‘A’ weighted @ 48kHz)
Headphone driver with ‘capless’ option
- 40mW/channel output power into 16 / 3.3V AVDD2
- Class D headphone driver
- Class AB headphone / line Driver
- PSRR 70dB at 217Hz
Stereo, mono or differential line output
Mic Preamps:
Stereo differential or mono microphone interfaces
Programmable preamp gain
Pseudo differential inputs with common mode rejection
Programmable ALC / Noise Gate in ADC path
Low-noise bias supplied for electret microphones
Other Features:
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’
PLL supporting various clocks between 8MHz-50MHz
Sample rates supported (kHz): 8, 11.025, 16, 12, 16, 22.05,
24, 32, 44.1, 48
Low power, low voltage
2.5V to 3.6V analogue supplies
1.71V to 3.6V digital supplies
5x5mm 32-lead QFN package
APPLICATIONS
Portable audio player / FM radio
Multimedia Mobile Handsets
WOLFSON MICROELECTRONICS plc
Production Data, February 2013, Rev 4.7
Copyright 2013 Wolfson Microelectronics plc
1 page  
Production Data
PIN CONFIGURATION
WM8985
ORDERING INFORMATION
ORDER CODE
WM8985CGEFL
TEMPERATURE
RANGE
-40C to +85C
WM8985CGEFL/R
-40C to +85C
Note:
Reel quantity = 3,500
PACKAGE
32-lead QFN (5 x 5 mm)
(Pb-free)
32-lead QFN (5 x 5 mm)
(Pb-free, tape and reel)
MOISTURE
SENSITIVITY LEVEL
MSL1
MSL1
PEAK SOLDERING
TEMPERATURE
260oC
260oC
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PD, Rev 4.7, February 2012
5
5 Page 
Production Data
WM8985
Test Conditions
DCVDD=1.8V, AVDD1=AVDD2=DBVDD=3.3V, TA = +25oC, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
DAC to L/R mixer into 10k / 50pF load on L/ROUT2, class AB mode
LOUT2VOL, ROUT2VOL, DACLVOL and DACRVOL = 0dB
Full-scale output 1
LOUT2VOL and
ROUT2VOL = 0dB
AVDD1/3.3
Vrms
Signal to Noise Ratio 3
SNR
A-weighted
100 dB
AVDD1=AVDD2=3.3V
A-weighted
96 dB
AVDD1=AVDD2=2.5V
22Hz to 20kHz
95.5
dB
AVDD1=AVDD2=3.3V
22Hz to 20kHz
93.5
dB
AVDD1=AVDD2=2.5V
Total Harmonic Distortion 4
THD
0dBFS input
AVDD1=AVDD2=3.3V
-84
dBFS
0dBFS input
AVDD1=AVDD2=2.5V
-82
dBFS
Total Harmonic Distortion + Noise 5
THD+N
0dBFS input
AVDD1=AVDD2=3.3V
-82
dBFS
0dBFS input
AVDD1=AVDD2=2.5V
-80
dBFS
Channel Separation 6
1kHz input signal
100
dB
DAC to OUT3 and OUT4 mixers into OUT3/OUT4 outputs into (10k / 50pF load. DACVOLL and DACVOLR = 0dB)
Full-scale output voltage
Signal to Noise Ratio 3
SNR
A-weighted
AVDD2/3.3
98
Vrms
dB
AVDD1=AVDD2=3.3V
Total Harmonic Distortion 4
THD
full-scale signal
-84
dBFS
AVDD1=AVDD2=3.3V
Total Harmonic Distortion + Noise 5
THD+N
full-scale signal
-82
dBFS
AVDD1=AVDD2=3.3V
Channel Separation 6
1kHz signal
100 dB
DAC to left and right mixer into headphone 16Ω load on LOUT1 and ROUT1
LOUT1VOL, ROUT1VOL, DACLVOL and DACRVOL = 0dB
Full-scale output
Signal to Noise Ratio 3
SNR
A-weighted
AVDD1/3.3
100
Vrms
dB
AVDD1=AVDD2=3.3V
22Hz to 20kHz
95.5
dB
AVDD1=AVDD2=3.3V
Total Harmonic Distortion 4
THD
Po = 20mW, RL=16Ω
-79
dB
Total Harmonic Distortion + Noise 5
THD+N
Po = 20mW, RL=16Ω
-75
dB
Channel Separation 6
1kHz signal
100 dB
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PD, Rev 4.7, February 2012
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet WM8985.PDF ] | |
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