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Número de pieza | WM8772 | |
Descripción | 24 BIT 192KHZ 6 CHANNEL CODEC WITH VOLUME CONTROL | |
Fabricantes | Wolfson Microelectronics plc | |
Logotipo | ||
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WM8772
24-bit, 192kHz 6-Channel Codec with Volume Control
DESCRIPTION
The WM8772 is a multi-channel audio codec ideal for DVD
and surround sound processing applications for home hi-fi,
automotive and other audio visual equipment.
A stereo 24-bit multi-bit sigma delta ADC is used. Digital
audio output word lengths from 16-32 bits and sampling
rates from 32kHz to 96kHz are supported. The 32-lead
version allows separate ADC and DAC samples rates.
Three stereo 24-bit multi-bit sigma delta DACs are used
with oversampling digital interpolation filters. Digital audio
input word lengths from 16-32 bits and sampling rates from
8kHz to 192kHz are supported. Each DAC channel has
independent digital volume and mute control.
The audio data interface supports I2S, left justified, right
justified and DSP digital audio formats.
The device is controlled via a 3 wire serial interface. The
interface provides access to all features including channel
selection, volume controls, mutes, de-emphasis and power
management facilities. The device is available in a 28-pin
SSOP or 32 pin TQFP.
BLOCK DIAGRAM - 28 PIN SSOP
FEATURES
• Audio Performance
− 103dB SNR (‘A’ weighted @ 48kHz) DAC
− 100dB SNR (‘A’ weighted @ 48kHz) ADC (TQFP)
• DAC Sampling Frequency: 8kHz – 192kHz
• ADC Sampling Frequency: 32kHz – 96kHz
• ADC and DAC can run at different sample rates (32 pin
TQFP version only)
• 3-Wire SPI Serial or Hardware Control Interface
• Programmable Audio Data Interface Modes
− I2S, Left, Right Justified or DSP
− 16/20/24/32 bit Word Lengths
• Three Independent stereo DAC outputs with independent
digital volume controls
• Master or Slave Audio Data Interface
• 2.7V to 5.5V Analogue, 2.7V to 3.6V Digital supply
Operation
• 28 pin SSOP or 32 pin TQFP Package
APPLICATIONS
• DVD Players
• Surround Sound AV Processors and Hi-Fi systems
• Automotive Audio
AINL
AINR
VREFN
STEREO
ADC
AUDIO
INTERFACE
&
DIGITAL FILTERS
VREFN VREFP
STEREO
DAC
STEREO
DAC
STEREO
DAC
LOW
PASS
FILTER
LOW
PASS
FILTER
LOW
PASS
FILTER
VOUT1L
VOUT1R
VOUT2L
VOUT2R
VOUT3L
VOUT3R
CONTROL INTERFACE
W
WM8772EDS
WOLFSON MICROELECTRONICS plc
w :: www.wolfsonmicro.com
Production Data, October 2004, Rev 4.1
Copyright 2004 Wolfson Microelectronics plc
1 page Production Data
PIN CONFIGURATION - 28 LEAD SSOP
MODE
MCLK
BCLK
LRC
DVDD
DGND
DIN1
DIN2
DIN3
DOUT
ML/I2S
MC/IWL
MD/DM
MUTE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 AVDD
27 AGND
26 VOUT3R
25 VOUT3L
24 VOUT2R
23 VOUT2L
22 VOUT1R
21 VOUT1L
20 AINL
19 AINR
18 VMID
17 VREFP
16 VREFN
15 REFADC
WM8772
ORDERING INFORMATION
DEVICE
WM8772EDS
TEMPERATURE
RANGE
-25 to +85oC
WM8772EDS/R
-25 to +85oC
WM8772SEDS/V
-25 to +85oC
WM8772SEDS/RV
-25 to +85oC
Note:
Reel quantity = 2,000
PACKAGE
28-pin SSOP
28-pin SSOP
(tape and reel)
28-pin SSOP
(lead free)
28-pin SSOP
(lead free, tape
and reel)
MOISTURE
SENSITIVITY LEVEL
MSL1
MSL1
MSL2
MSL2
PEAK SOLDERING
TEMPERATURE
260oC
260oC
260oC
260oC
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PD Rev 4.1 October 2004
5
5 Page Production Data
WM8772
Test Conditions
AVDD, VREFP = 5V, DVDD = 3.3V, AGND, VREFN = 0V, DGND = 0V, TA = +25oC, fs = 48kHz, MCLK = 256fs, 32-pin TQFP
version unless otherwise stated. ADC/DAC in Slave Mode unless otherwise stated.
PARAMETER
SYMBOL TEST CONDITIONS
MIN
TYP
MAX
UNIT
ADC Performance
Input Signal Level (0dB)
Input resistance
2.0 x
REFADC/5
20
Vrms
kΩ
Input capacitance
10 pF
SNR (Note 1,2,4)
A-weighted, 0dB gain
80
100
dB
@ fs = 48kHz
SNR (Note 1,2,4)
A-weighted, 0dB gain
100
dB
@ fs = 96kHz
64 x OSR
SNR (Note 1,2,4)
A-weighted, 0dB gain
93
dB
@ fs = 48kHz, AVDD =
3.3V
SNR (Note 1,2,4)
A-weighted, 0dB gain
93
dB
@ fs = 96kHz, AVDD
= 3.3V
64 x OSR
Total Harmonic Distortion (THD)
kHz, 0dBFs
-80 dB
1kHz, -1dBFs -82 dB
ADC Channel Separation
1kHz Input
90 dB
Mute Attenuation
1kHz Input, 0dB gain
90
dB
Power Supply Rejection Ratio
PSRR
1kHz 100mVpp
50
dB
20Hz to 20kHz
100mVpp
45
dB
Digital Logic Levels (CMOS Levels)
Input LOW level
Input HIGH level
Input leakage current
VIL
VIH
0.3 x DVDD
0.7 x DVDD
±0.2 ±1
V
V
µA
Input capacitance
5 pF
Output LOW
Output HIGH
Analogue Reference Levels
VOL
VOH
IOL=1mA
IOH= -1mA
0.9 x DVDD
0.1 x DVDD
V
V
Reference voltage
Potential divider resistance
VVMID
RVMID
VREFP to VMID and
VMID to VREFN
VREFP/2 –
50mV
VREFP/2
50
VREFP/2 +
50mV
V
kΩ
Supply Current
Analogue supply current
AVDD, VREFP = 5V
45
mA
Digital supply current
DVDD = 3.3V 16 mA
Notes:
1. Ratio of output level with 1kHz full scale input, to the output level with all zeros into the digital input, measured ‘A’
weighted.
2. All performance measurements done with 20kHz low pass filter, and where noted an A-weight filter. Failure to use
such a filter will result in higher THD+N and lower SNR and Dynamic Range readings than are found in the Electrical
Characteristics. The low pass filter removes out of band noise; although it is not audible it may affect dynamic
specification values.
3. VMID decoupled with 10uF and 0.1uF capacitors (smaller values may result in reduced performance).
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PD Rev 4.1 October 2004
11
11 Page |
Páginas | Total 30 Páginas | |
PDF Descargar | [ Datasheet WM8772.PDF ] |
Número de pieza | Descripción | Fabricantes |
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