WM8736.pdf 데이터시트 (총 17 페이지) - 파일 다운로드 WM8736 데이타시트 다운로드

No Preview Available !

WM8736
24-bit, 96kHz 6-Channel DAC with Volume Control
Production Data, January 2001, Rev 2.1
DESCRIPTION
The WM8736 is a high performance 6-channel DAC
designed for audio applications such as DVD, home theatre
systems, and digital TV. The WM8736 supports data input
word lengths from 16 to 24-bits and sampling rates up to
96kHz. The WM8736 consists of a serial interface port,
digital interpolation filters, multi-bit sigma delta modulators
and 6 DACs in a small 28-pin SSOP package. The
WM8736 also includes a digitally controllable mute and
attenuator function on each channel.
The WM8736 supports a variety of connection schemes for
audio DAC control. The SPI-compatible 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.
The WM8736 is an ideal device to interface to AC-3,
DTS, and MPEG audio decoders for surround sound
applications.
FEATURES
6-channel DAC
Performance:
102dB SNR (‘A’ weighted @ 48kHz), THD+N: -95dB
at full scale
5V or 3.3V supply operation
Sampling frequency: 8kHz to 96kHz
Input data word: 16 to 24-bit
Hardware or SPI compatible serial port control modes:
Hardware mode: system clock, reset, mute
Serial control mode: mute, de-emphasis, digital
attenuation (256 steps), zero mute, power down
APPLICATIONS
DVD
Home theatre systems
Digital TV
Digital broadcast receivers
BLOCK DIAGRAM
SCKI
(2)
ML/I2S MC/IWL MD/DM
(12) (13) (14)
RSTB MODE MUTE
(10) (8)
(9)
BCKIN (3)
LRCIN (4)
DIN0 (5)
DIN1 (6)
DIN2 (7)
256fs/384fs/512fs
WM8736
CONTROL INTERFACE
MUTE/
ATTEN
SIGMA
DELTA
MODULATOR
STEREO
DAC
SERIAL
INTERFACE
DIGITAL
FILTERS
MUTE/
ATTEN
SIGMA
DELTA
MODULATOR
STEREO
DAC
MUTE/
ATTEN
SIGMA
DELTA
MODULATOR
STEREO
DAC
(27) OUT0R
(26) GR0
(25) OUT0L
(23) OUT1R
(22) GR1
(21) OUT1L
(19) OUT2R
(18) GR2
(17) OUT2L
(24) (20) (11) (16)
(28) (15)
(1)
AGND2 AGND1 DGND CAP AVDD2 AVDD1 DVDD
WOLFSON MICROELECTRONICS LTD
Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK
Tel: +44 (0) 131 667 9386
Fax: +44 (0) 131 667 5176
Email: sales@wolfson.co.uk
www.wolfsonmicro.com
Production Data Datasheets contain final
specifications current on publication date.
Supply of products conforms to Wolfson
Microelectronics’ Terms and Conditions.
2001 Wolfson Microelectronics Ltd.

No Preview Available !

WM8736
PIN CONFIGURATION
DVDD
SCKI
BCKIN
LRCIN
DIN0
DIN1
DIN2
MODE
MUTE
RSTB
DGND
ML/I2S
MC/IWL
MD/DM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 AVDD2
27 OUT0R
26 GR0
25 OUT0L
24 AGND2
23 OUT1R
22 GR1
21 OUT1L
20 AGND1
19 OUT2R
18 GR2
17 OUT2L
16 CAP
15 AVDD1
Production Data
ORDERING INFORMATION
DEVICE
WM8736EDS
TEMP. RANGE
-25o to 85oC
PACKAGE
28-pin SSOP
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
Supply voltage
Reference input
Operating temperature range, TA
Storage temperature
Package body temperature (soldering, 10 seconds)
Package body temperature (soldering, 2 minutes)
MIN
-0.3V
-25o C
-65o C
MAX
+7V
VDD + 0.3V
+85oC
+150oC
+240oC
+183oC
WOLFSON MICROELECTRONICS LTD
PD Rev 2.1 January 2001
2

No Preview Available !

Production Data
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Digital supply range
Analogue supply range
Ground
Difference DGND to AGND
Analogue supply current
Digital supply current
Analogue supply current
Digital supply current
SYMBOL
DVDD
AVDD
AGND, DGND
AVDD = 5V
DVDD = 5V
AVDD = 3.3V
DVDD = 3.3V
TEST CONDITIONS
MIN
-10%
-10%
-0.3
TYP
3.3 to 5
3.3 to 5
0
0
50
15
45
15
WM8736
MAX
+10%
+10%
+0.3
UNIT
V
V
V
V
mA
mA
mA
mA
ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD, DVDD = 5V, AGND, DGND = 0V, TA = +25oC, fs = 48kHz, SCKI = 256fs unless otherwise stated.
PARAMETER
DAC Circuit Specifications
SNR (See Notes 1 and 2)
SYMBOL
SNR with automute on
THD (full-scale)
(See Note 2)
THD+N (Dynamic range)
(See Note 2)
Frequency response
Pass band ripple
Transition band
Out of band rejection
Channel separation
Gain mismatch
channel-to-channel
Digital Logic Levels
Input LOW level
Input HIGH level
Output LOW level
Output HIGH level
Analogue Output Levels
Output level
VIL
VIH
VOL
VOH
Minimum resistance load
Maximum capacitance load
Output d.c. level
Reference Levels
Potential divider resistance
Voltage at CAP
POR
POR threshold
TEST CONDITIONS
AVDD, DVDD = 5V
AVDD, DVDD = 3.3V
AVDD, DVDD = 5V
AVDD, DVDD = 3.3V
0dB
-60dB
MIN
95
0
20,000
TYP
102
100
110
108
-96
102
0.125
-40
90
±1
MAX
UNIT
-85
20,000
dB
dB
dB
dB
dB
dB
Hz
dB
Hz
dB
dB
%FSR
IOL = 2mA
IOH = 2mA
2.0
DVDD - 0.3V
0.8
GND + 0.3V
V
V
Into 10kohm, full scale 0dB,
(5V supply)
Into 10kohm, full scale 0dB,
(3.3V supply)
To midrail or a.c. coupled
(5V supply)
To midrail or a.c. coupled
(3.3V supply)
5V or 3.3V
1.1
0.72
1
1
100
AVDD/2
VRMS
VRMS
kohms
kohms
pF
V
AVDD to CAP and
CAP to AGND
90
AVDD/2
kohms
1.8 V
WOLFSON MICROELECTRONICS LTD
PD Rev 2.1 January 2001
3

No Preview Available !

WM8736
Production Data
LRCIN
BCKIN
DIN
tBCH
tBCL
tBCY
tDS
tBL
tDH
tLB
Figure 1 Audio Data Input Timing
Test Conditions
AVDD, DVDD = 5V, AGND, DGND = 0V, TA = +25oC, fs = 48kHz, SCKI = 256fs unless otherwise stated.
PARAMETER
SYMBOL
Audio Data Input Timing Information
BCKIN pulse cycle time
tBCY
BCKIN pulse width high
BCKIN pulse width low
tBCH
tBCL
BCKIN rising edge
to LRCIN edge
tBL
LRCIN rising edge
to BCKIN rising edge
tLB
DIN setup time
tDS
DIN hold time
tDH
TEST CONDITIONS
MIN TYP
100
50
50
30
30
30
30
MAX
SCKI
tSCKIL
tSCKIH
UNIT
ns
ns
ns
ns
ns
ns
ns
Figure 2 System Clock Timing Requirements
Test Conditions
AVDD, DVDD = 5V, AGND, DGND = 0V, TA = +25oC, fs = 48kHz, SCKI = 256fs unless otherwise stated.
PARAMETER
SYMBOL
System Clock Timing Information
TEST CONDITIONS
MIN TYP
SCKI system clock pulse
width high
SCKI system clock pulse
width low
tSCKIH
tSCKIL
13
13
MAX
UNIT
ns
ns
WOLFSON MICROELECTRONICS LTD
PD Rev 2.1 January 2001
4

No Preview Available !

Production Data
ML/12S
MC/IWL
MD/DM
tMCH
tMCL
tMCY
tMDS
tMDH
WM8736
tMLS
tMLL
tMLH
Figure 3 Program Register Input Timing
Test Conditions
AVDD, DVDD = 5V, AGND, DGND = 0V, TA = +25oC, fs = 48kHz, SCKI = 256fs unless otherwise stated.
PARAMETER
SYMBOL
Program Register Input Information
MC/IWL pulse cycle time
MC/IWL pulse width low
MD/DM pulse width high
MD/DM set-up time
MC/IWL hold time
ML/I2S pulse width low
ML/I2S set-up time
ML/I2S hold time
tMCY
tMCL
tMCH
tMDS
tMDH
tMLL
tMLS
tMLH
Notes:
TEST CONDITIONS
MIN
TYP
MAX
UNIT
100 ns
50 ns
50 ns
30 ns
30 ns
30 ns
30 ns
30 ns
1. Ratio of output level with 1kHz full scale input, to the output level with all zeros into the digital input, measured A
weighted over a 20Hz to 20kHz bandwidth.
2. All performance measurements done with 20kHz low pass 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.
WOLFSON MICROELECTRONICS LTD
PD Rev 2.1 January 2001
5