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부품번호 | WM8569 기능 |
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기능 | Stereo CODEC | ||
제조업체 | Wolfson Microelectronics | ||
로고 | |||
전체 36 페이지수
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WM8569
24-bit, 192kHz Stereo CODEC with Volume Control
DESCRIPTION
FEATURES
The WM8569 is a stereo audio codec ideal for DVD, PVR,
LCD-TV and automotive applications. Independent ADC
and DAC clocking permits separate record and playback
sampling rates.
• Audio Performance
− 103dB SNR (‘A’ weighted @ 48kHz) DAC
− DAC Sampling Frequency: 8kHz – 192kHz
− 100dB SNR (‘A’ weighted @ 48kHz) ADC
A stereo 24-bit multi-bit sigma delta DAC with oversampling
− ADC Sampling Frequency: 32kHz – 96kHz
and digital interpolation filters provides the output signal.
Digital audio input word lengths from 16-24 bits and
sampling rates from 8kHz to 192kHz are supported.
• Independent Sampling Rates for ADC and DAC
• 3-wire SPI Serial or Hardware Control Interface
• Audio Mute and De-Emphasis Functions
A stereo 24-bit multi-bit sigma delta ADC is used. Digital
audio output word lengths from 16-24 bits and sampling
rates from 32kHz to 96kHz are supported. The DAC and
ADC support independent sampling rates.
• Programmable Audio Data Interface Modes
− 16/20/24/32 bit Word Lengths
− I2S, Left, Right Justified or DSP
The audio data interface supports I2S, left justified, right
justified and DSP digital audio formats.
• 2.7V to 5.5V Analogue Supply
• 2.7V to 3.6V Digital Supply
• 28-lead SSOP Package
The device is controlled via a 3-wire serial interface. The
interface provides access to all features including volume
APPLICATIONS
controls, mutes, de-emphasis and power management
facilities. A hardware control interface allows access to a
• DVD Recorder
limited feature set. The WM8569 is available in a 28-lead
• Personal Video Recorder
SSOP.
• PC Sound Card
www.DataShee•t4U.coAmutomotive Audio
• LCD-TV
BLOCK DIAGRAM
WOLFSON MICROELECTRONICS plc
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Production Data, June 2006, Rev 4.0
Copyright 2006 Wolfson Microelectronics plc
WM8569
Production Data
PIN DESCRIPTION
PIN NAME
TYPE
DESCRIPTION
1
DACMCLK
Digital Input
Master DAC clock: 256fs, 384fs, 512fs or 768fs
2
ADCBCLK
Digital Input
ADC audio interface bit clock
3 DACBLCK Digital Input/Output DAC audio interface bit clock
4
ADCLRC
Digital Input/Output ADC left/right word clock
5
DACLRC
Digital Input/Output DAC left/right word clock
6 DVDD
Supply
Digital positive supply
7 DGND
Supply
Digital ground
8
DIN
Digital input
DAC data input
9
NC
No Connect
No Connect
10
DOUT
Digital output
ADC data output
11
CSB/IDF
Digital input
Software Mode: Serial control interface latch signal
Hardware Mode: Input audio data format
12
SCLK/IWL
Digital input
Software Mode: Serial control interface clock
Hardware Mode: Audio data input word length
13
SDIN/DM
Digital input
Software Mode: Serial control interface data
Hardware Mode: De-emphasis selection
14
MUTE
Digital input/output DAC Zero Flag output or DAC mute input
15
REFADC
Analogue output ADC reference buffer decoupling pin; 10uF external decoupling
16 ADCVREFN
Supply
ADC negative reference supply
17 DACVREFN
Supply
DAC negative reference supply
18 DACVREFP
Supply
DAC positive reference supply
19
VMID
Analogue output Midrail divider decoupling pin; 10uF external decoupling
20
AINR
Analogue input ADC right input
21
AINL
Analogue input ADC left input
22
VOUTL
Analogue output DAC left output
23
VOUTR
Analogue output DAC right output
24
NC
No Connect
No Connect
25 AGND
Supply
Analogue negative supply and substrate connection
26 AVDD
Supply
Analogue positive supply
27
MODE
Digital Input
Control format selection:
0 = Software mode
1 = Hardware mode
28
ADCMCLK
Digital Input
Master ADC clock: 256fs, 384fs, 512fs or 768fs
Note: Digital input pins have Schmitt trigger input buffers.
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PD Rev 4.0 June 2006
4
4페이지 Production Data
WM8569
Test Conditions
AVDD, VREFP = 5V, DVDD = 3.3V, AGND, VREFN = 0V, DGND = 0V, TA = +25oC, fs = 48kHz, MCLK = 256fs.
PARAMETER
SYMBOL TEST CONDITIONS
MIN
TYP MAX
Mute Attenuation
1kHz Input, 0dB gain
90
Power Supply Rejection Ratio
PSRR
1kHz 100mVpp
50
20Hz to 20kHz
100mVpp
45
Digital Logic Levels (CMOS Levels)
Input LOW level
VIL
0.3 x DVDD
Input HIGH level
VIH
0.7 x DVDD
Input leakage current
±0.2 ±1
Input capacitance
5
Output LOW
VOL IOL=1mA
0.1 x DVDD
Output HIGH
VOH
IOH= -1mA
0.9 x DVDD
Analogue Reference Levels
Reference voltage
VVMID
VREFP/2 – VREFP/2 VREFP/2 +
50mV
50mV
Potential divider resistance
RVMID
VREFP to VMID and
VMID to VREFN
50
Supply Current
Analogue supply current
AVDD, VREFP = 5V
TBD
Digital supply current
DVDD = 3.3V
TBD
UNIT
dB
dB
dB
V
V
µA
pF
V
V
V
kΩ
mA
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).
TERMINOLOGY
1. Signal-to-noise ratio (dB) - SNR is a measure of the difference in level between the full scale output and the output
with no signal applied. (No Auto-zero or Automute function is employed in achieving these results).
2. Dynamic range (dB) - DNR is a measure of the difference between the highest and lowest portions of a signal.
Normally a THD+N measurement at 60dB below full scale. The measured signal is then corrected by adding the 60dB
to it. (e.g. THD+N @ -60dB= -32dB, DR= 92dB).
3. THD (dB) - THD is a ratio, of the rms values, of Distortion/Signal.
4. Stop band attenuation (dB) - Is the degree to which the frequency spectrum is attenuated (outside audio band).
5. Channel Separation (dB) - Also known as Cross-Talk. This is a measure of the amount one channel is isolated from
the other. Normally measured by sending a full scale signal down one channel and measuring the other.
6. Pass-Band Ripple - Any variation of the frequency response in the pass-band region.
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PD Rev 4.0 June 2006
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부품번호 | 상세설명 및 기능 | 제조사 |
WM8569 | Stereo CODEC | Wolfson Microelectronics |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |