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부품번호 | WM8608 기능 |
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기능 | 5 TO 7.1 CHANNEL PWM CONTROLLER | ||
제조업체 | Wolfson Microelectronics | ||
로고 | |||
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WM8608
5 to 7.1 Channel PWM Controller
DESCRIPTION
The WM8608 comprises a high performance multi-channel
PWM digital power amplifier controller. Simply by adding
appropriate power output stages a multi-channel power
amplifier may be built. Six identical full audio bandwidth
channels, plus a reduced bandwidth sub channel are
provided as PWM outputs, to drive 6 speakers plus Sub.
The PCM to PWM converter supports up to 7.1 channels of
audio, in PCM input formats. These may be mixed down to
6.1 or 5.1 outputs, by mixing rear channel data into centre
rear or surround speakers if required. If 5.1 channel data is
input, the surround data may be processed internally to
create a pseudo 6.1 signal with rear channel output.
A Graphic Equaliser function is provided, plus selectable
high frequency equalisation to suit different speaker types.
Independent volume control for each channel is provided.
The WM8608 PWM controller is compatible with integrated
switching output stages available from a number of vendors
or alternatively may be used with a discrete output stage
configuration and achieve similar levels of performance.
A Dynamic Peak Compressor with programmable attack
and decay times is included, which allows headroom for
tone control, bass management and extra digital gain to be
provided, without clipping occurring.
A Synchroniser allows slaving to LRCLK, thus making the
WM8608 independent of source MCLK frequency and jitter.
The device is controlled via a 2/3 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 supplied in a 48-pin
TQFP package.
FEATURES
• Multi-channel PWM audio amplifier controller
• Supports Stereo, 5.1, 6.1 or 7.1 inputs
• Supports 2.1, 5.1 or 6.1 outputs with optional rear centre
channel generation
• PWM Audio Performance with typical output stage
− 100dB SNR (‘A’ weighted @ 48kHz)
− 0.01% THD @ 1Watt
− 0.1% THD @ 30Watt
• Integrated Bass Management support with adjustable filter
• Integrated 4-band Graphic Equaliser for 3 front channels
• Adjustable output stage filter compensation for different
speakers
• Volume control on each 6.1 channel +24dB to -103.5dB in
0.5dB steps, with volume ramping and auto-mute
functions
• Programmable Dynamic Peak Compressor avoids clipping
even at high volume settings
• Internal PLL and optional crystal oscillator, supporting
Audio and MPEG standards
• 2/3-Wire MPU Serial Control Interface
• Master or Slave Clocking Mode
• Programmable Audio Data Interface Modes
− I2S, Left, Right Justified or DSP
− 16/20/24/32 bit Word Lengths
• De-emphasis support for stereo
• Selectable CMOS or LVDS digital outputs
APPLICATIONS
• Surround Sound AV Processors and Hi-Fi systems
• Automotive Audio
• DVD receivers
WOLFSON MICROELECTRONICS plc
www.wolfsonmicro.com
Product Preview, March 2004, Rev 1.5
Copyright 2004 Wolfson Microelectronics plc
WM8608
PIN CONFIGURATION
OPFRN
OPFRP
BGND
OPFLN
OPFLP
BVDD
PWMCLKN
PWMCLKP
TEST
TEST
AVDD
AGND
36 35 34 33 32 31 30 29 28 27 26 25
37 24
38 23
39 22
40 21
41 20
TOP42 19
43
VIEW
18
44 17
45 16
46 15
47 14
13
1 2 3 4 5 6 7 8 9 10 11 12
BVDD
OPRCP
OPRCN
BGND
OPSWP
OPSWN
BVDD
EAPDB
CSB
SDIN
SCLK
MODE
Product Preview
ORDERING INFORMATION
DEVICE
TEMP RANGE
WM8608EFT/V
WM8608EFT/RV
-25 to + 85°C
-25 to + 85°C
WM8608SEFT/V
-25 to + 85°C
WM8608SEFT/RV
-25 to + 85°C
Note:
Reel quantity = 2,200
PACKAGE
TQFP 48 7x7mm
TQFP 48 7x7mm
(tape and reel)
TQFP 48 7x7mm
(lead free)
TQFP 48 7x7mm
(lead free, tape and reel)
MOISTURE LEVEL
SENSITIVITY
MSL2
MSL2
MSL2
MSL2
PEAK SOLDERING
TEMP
240°C
240°C
260°C
260°C
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PP Rev 1.5 March 2004
4
4페이지 Product Preview
WM8608
ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD, BVDD, DVDD = 2.7 to 3.3V, AGND, DGND, BGND = 0V, TA = -20 to +85oC, fs = 44.1kHz/48kHz, MCLK = 256fs unless
stated.
PARAMETER
SYMBOL TEST CONDITIONS
MIN
TYP
MAX
UNIT
Input capacitance
Ci
3 4 pF
Input leakage
Ileak
±0.1 ±0.5
µA
Oscillator
Input XIN LOW level
Input XIN HIGH level
VXIL
VXIH
0 0.44 V
0.77
AVDD
V
Input XIN capacitance
CXI
4 5 pF
Input XIN leakage
Output XOP LOW
Output XOP HIGH
IXleak
VXOL
VXOH
15pF load capacitors
15pF load capacitors
0.10
0.1
1.2
0.11
0.4
1.3
0.13
0.5
1.4
mA
V
V
Digital Logic Levels (CMOS Levels)
Input LOW level
VIL
0.3 x DVDD
V
Input HIGH level
Pull-up/pull-down resistance
VIH
0.7 x DVDD
100
200
400
V
kΩ
Output LOW
Output HIGH
Digital Logic Levels (LVDS Levels)
VOL
VOH
IOL=+1mA
IOL=-1mA
0.9 x DVDD
0.1 x DVDD
V
V
Output differential voltage
Offset voltage
Termination load
VOD
RT=100Ω
200 350 500 mV
VOS
RT=100Ω
0.95 1.25
1.4
V
RT 20pF load
100 Ω
PCM to PWM converter
Digital SNR
FL, FR, FC, SL, SR, RC
105
dB
Typical SNR with output stage
FL, FR, FC, SL, SR, RC
100
dB
(A-weighted)
Typical Dynamic Range with
output stage
FL, FR, FC, SL, SR, RC
100
dB
Digital THD+N at 0dBfs
FL, FR, FC, SL, SR, RC
0.001
%
Typical THD+N at 30Watt with
output stage
FL, FR, FC, SL, SR, RC
0.1
%
Typical THD+N at 1Watt with
typical output stage
FL, FR, FC, SL, SR, RC
0.01
%
Typical IMD (CCIF – 19/20kHz)
FL, FR, FC, SL, SR, RC
-70
dBFS
Typical IMD (SMPTE –
60Hz/7kHz)
FL, FR, FC, SL, SR, RC
-70
dBFS
PCM to PWM converter
Digital SNR
Typical SNR with output stage
Subwoofer5
Subwoofer5
105 dB
100 dB
(A-weighted)
Typical Dynamic Range with
output stage
Digital THD+N at 0dBfs
Subwoofer5
Subwoofer5
100
0.001
dB
%
Typical THD+N at 30Watt with
output stage
Typical THD+N at 1Watt with
typical output stage
Typical IMD (CCIF – 19/20kHz)
Typical IMD (SMPTE –
60Hz/7kHz)
Subwoofer5
Subwoofer5
Subwoofer5
Subwoofer5
0.1 %
0.01 %
-70 dBFS
-70 dBFS
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PP Rev 1.5 March 2004
7
7페이지 | |||
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부품번호 | 상세설명 및 기능 | 제조사 |
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |