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WM8706 데이터시트 PDF




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부품번호 WM8706 기능
기능 24-bit/ 192kHz Stereo DAC with Volume Control
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WM8706 데이터시트, 핀배열, 회로
WM8706
24-bit, 192kHz Stereo DAC with Volume Control
Product Preview, Rev 1.2, April 2001
DESCRIPTION
The WM8706 is a high performance stereo DAC designed
for audio applications such as DVD, home theatre systems,
and digital TV. The WM8706 supports data input word
lengths from 16 to 32-bits and sampling rates up to 192kHz.
The WM8706 can implement 2 channels at 192kHz for high-
end DVD-Audio. The WM8706 consists of a serial interface
port, digital interpolation filters, multi-bit sigma delta
modulators and stereo DAC in a small 28-pin SSOP
package. The WM8706 also includes a digitally controllable
mute and attenuate function on each channel.
The WM8706 supports a variety of connection schemes for
audio DAC control. The MPU serial port provides access to
a wide range of features including on-chip mute, attenuation
and phase reversal. A hardware controllable interface is
also available. It is pin-compatible with the WM8716
provided the oscillator circuit on WM8716 is not required in
the application.
The WM8706 is an ideal device to interface to AC-3,
DTS, and MPEG audio decoders for surround sound
applications, or for use in DVD players supporting DVD-A.
BLOCK DIAGRAM
FEATURES
Stereo DAC
Audio Performance
- 106dB SNR (‘A’ weighted @ 48kHz) DAC
- -97dB THD
DAC Sampling Frequency: 8kHz – 192kHz
3-Wire Serial Control Interface or Hardware Control
Programmable Audio Data Interface Modes
- I2S, Left, Right Justified, DSP
- 16/20/24/32 bit Word Lengths
Independent Digital Volume Control on Each Channel with
127.5dB Range in 0.5dB Steps
3.0V – 5.5V Supply Operation
28-Pin SSOP Package
Exceeds Dolby Class A Performance Requirements
APPLICATIONS
DVD-Audio and DVD ‘Universal’ Players
Home theatre systems
Digital TV
Digital broadcast receivers
MODE MLIIS MCDM1 MDDM0 MUTEB CSBIWO ZERO
CONTROL INTERFACE
WM8706
BCKIN
LRCIN
DIN
SERIAL
INTERFACE
MUTE/
ATTEN
MUTE/
ATTEN
DIGITAL FILTERS
SIGMA
DELTA
MODULATOR
SIGMA
DELTA
MODULATOR
RIGHT
DAC
LEFT
DAC
LOW
PASS
FILTER
LOW
PASS
FILTER
VOUTR
VOUTL
VMID
XTI AVDD DVDD
VREFP VREFN AGND DGND
WOLFSON MICROELECTRONICS LTD
Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK
Tel: +44 (0) 131 667 9386
Fax: +44 (0) 131 667 5176
www.wolfsonmicro.com
Product Preview data sheets contain
specifications for products in the formative
phase of development. These products may
be changed or discontinued without notice.
2001 Wolfson Microelectronics Ltd.




WM8706 pdf, 반도체, 판매, 대치품
WM8706
Product Preview
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.
CONDITION
Digital supply voltage
Analogue supply voltage
Voltage range digital inputs
Voltage range analogue inputs
Master Clock Frequency (XTI)
Operating temperature range, TA
Storage temperature
Package body temperature (soldering 10 seconds)
Package body temperature (soldering 2 minutes)
Note:
Analogue and digital grounds must always be within 0.3V of each other.
MIN
-0.3V
-0.3V
DGND -0.3V
AGND -0.3V
-25°C
-65°C
MAX
+7V
+7V
DVDD +0.3V
AVDD +0.3V
50MHz
+85°C
+150°C
+240°C
+183°C
WOLFSON MICROELECTRONICS LTD
PP Rev 1.2 April 2001
4

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WM8706 전자부품, 판매, 대치품
WM8706
Product Preview
MASTER CLOCK TIMING
XTI
tXTIL
tXTIH
tXTIY
Figure 1 Master Clock Timing Requirements
Test Conditions
AVDD, DVDD = 5V, AGND, DGND = 0V, TA = +25oC, fs = 48kHz, XTI = 256fs unless otherwise stated.
PARAMETER
SYMBOL
Master Clock Timing Information
XTI Master clock pulse width high
XTI Master clock pulse width low
tXTIH
tXTIL
XTI Master clock cycle time
tXTIY
XTI Duty cycle
TEST CONDITIONS
MIN
13
13
26
40:60
TYP
MAX
60:40
UNIT
ns
ns
ns
DIGITAL AUDIO INTERFACE
tBCH
BCKIN
tBCY
tBCL
LRCIN
DIN
tDS tLRH
tLRSU
tDH
Figure 2 Digital Audio Data Timing
Test Conditions
AVDD, DVDD = 5V, AGND, DGND = 0V, TA = +25oC, fs = 48kHz, XTI = 256fs unless otherwise stated.
PARAMETER
SYMBOL
Audio Data Input Timing Information
BCKIN cycle time
tBCY
BCKIN pulse width high
BCKIN pulse width low
LRCIN set-up time to
BCKIN rising edge
tBCH
tBCL
tLRSU
LRCIN hold time from
BCKIN rising edge
tLRH
DIN set-up time to BCKIN
rising edge
tDS
DIN hold time from BCKIN
rising edge
tDH
TEST CONDITIONS
MIN TYP
40
16
16
8
8
8
8
MAX
UNIT
ns
ns
ns
ns
ns
ns
ns
WOLFSON MICROELECTRONICS LTD
PP Rev 1.2 April 2001
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관련 데이터시트

부품번호상세설명 및 기능제조사
WM8706

24-bit/ 192kHz Stereo DAC with Volume Control

Wolfson Microelectronics plc
Wolfson Microelectronics plc

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