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Электронный компонент: WM9708CDS/R

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WM9708
AC'97 Revision 2.1 Audio CODEC
WOLFSON MICROELECTRONICS plc
www.wolfsonmicro.com
Production Data, November 2002, Rev 3.0
Copyright
2002 Wolfson Microelectronics plc
DESCRIPTION
WM9708 is a high-quality stereo audio codec compliant with
the AC'97 Revision 2.1 specification. It performs full duplex
18-bit codec functions and supports variable sample rates
from 8 to 48k samples/s and offers excellent quality with
high SNR. Additional features include line-level outputs and
hardware sample rate conversion.
The WM9708 is fully operable on 3.3V or 5V or mixed
3.3/5V supplies, and is packaged in a 28-pin SSOP
package.
AC'97 FEATURES
18-bit stereo codec
S/N ratio > 95dB
Multiple stereo input mixer
Mono and stereo volume control
Power management features
Very low standby power
Variable rate audio (VRA) support
Line level outputs
Supports Rev. 2.1 specified audio and modem sample rates
and filtering
PC-beep connection when device held reset
3.3V or 5V operation
28-pin SSOP package
BLOCK DIAGRAM
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
MONOOUT
LINEOUT
CD
LINEIN
PCBEEP
MIC1
0dB/
20dB
BITCLK
SYNC
SDATAIN
SDATAOUT
OSC
XTLIN
XTLOUT
VOL/
MUTE
STEREO
DAC
SRC
VOL
STEREO
ADC
SRC
VOL/
MUTE
MUX
VOL/
MUTE
MUX
KEY:
MONO
STEREO
RECORD
MUX
AND
MUTE
SERIAL
I/F
VOL/
MUTE
RESETB
W
WM9708
WM9708
Production Data
w
PD Rev 3.0 November 2002
2
PIN CONFIGURATION
ORDERING INFORMATION
DEVICE
TEMP. RANGE
PACKAGE
WM9708CDS
0 to 70
o
C
28-pin SSOP
WM9708CDS/R
0 to 70
o
C
28-pin SSOP
(tape and reel)
16
15
14
20
19
18
17
5
6
7
1
2
3
4
13
12
11
8
9
10
DVDD
CDL
MIC1
NC
NC
VREFOUT
LINEOUTR
LINEOUTL
CAP
NC
MONOOUT
AVDD
AGND
RESETB
LINEINR
XTLOUT
SDATAOUT
XTLIN
SYNC
AGND
SDATAIN
DGND
VREF
BITCLK
21
22
23
24
25
26
27
28
PCBEEP
CDGND
LINEINL
CDR
Note:
Reel quantity = 2,000
Production Data
WM9708
w
PD Rev 3.0 November 2002
3
PIN DESCRIPTION
PIN
28-PIN SSOP
NAME
TYPE
DESCRIPTION
1
NC
No internal connection
2
NC
No internal connection
3
DVDD
Supply
Digital positive supply
4
XTLIN
Digital input
Clock crystal connection or clock input (XTAL not used)
5
XTLOUT
Digital output
Clock crystal connection
6
SDATAOUT
Digital input
Serial data input
7
BITCLK
Digital output
Serial interface clock output to AC'97 controller
8
DGND
Supply
Digital ground supply
9
SDATAIN
Digital output
Serial data output to AC'97 controller
10
SYNC
Digital input
Serial interface sync pulse from AC'97 controller
11
RESETB
Digital input
NOT reset input (active low, resets registers)
12
PCBEEP
Analogue input
Mixer input, typically for PCBEEP signal
13
CDL
Analogue input
Mixer input, typically for CD signal
14
CDGND
Analogue input
CD input common mode reference (ground)
15
CDR
Analogue input
Mixer input, typically for CD signal
16
MIC1
Analogue input
Mixer input with extra gain if required
17
LINEINL
Analogue input
Mixer input, typically for LINE signal
18
LINEINR
Analogue input
Mixer input, typically for LINE signal
19
AGND
Supply
Analogue ground supply, chip substrate
20
VREF
Analogue output
Buffered CAP, used as MIXER reference
21
VREFOUT
Analogue output
Reference for microphones; buffered CAP
22
CAP
Analogue input
Reference input/output; pulls to midrail if not driven
23
NC
No internal connection
24
LINEOUTL
Analogue output
Main analogue output for left channel
25
LINEOUTR
Analogue output
Main analogue output for right channel
26
MONOOUT
Analogue output
Main mono output
27
AVDD
Supply
Analogue positive supply
28
AGND
Supply
Analogue ground supply, chip substrate
-
NC
No Internal Connection
WM9708
Production Data
w
PD Rev 3.0 November 2002
4
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.
The WM9708 has been classified as MSL1, which has an unlimited floor life at <30
o
C / 85% Relative Humidity and therefore will not
be supplied in moisture barrier bags.
CONDITION
MIN
MAX
Digital supply voltage
-0.3V
+7V
Analogue supply voltage
-0.3V
+7V
Voltage range digital inputs
DVSS -0.3V
DVDD +0.3V
Voltage range analogue inputs
AVDD -0.3V
AVDD +0.3V
Operating temperature range, T
A
0
o
C
+70
o
C
Storage prior to soldering
30
o
C max / 85% RH max
Storage temperature after soldering
-65
o
C
+150
o
C
Package body temperature (soldering 10 seconds)
+240
o
C
Package body temperature (soldering 2 minutes)
+183
o
C
Note:
1.
The digital supply voltage (DVDD) must always be less than or equal to the analogue supply voltage (AVDD).
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Digital supply range
DVDD
-10%
3.3 to 5.0
+10%
V
Analogue supply range
AVDD
-10%
3.3 to 5.0
+10%
V
Digital ground
DGND
0
V
Analogue ground
AGND
0
V
Difference DGND to AGND
-0.3
0
+0.3
V
Analogue supply current
DVDD, AVDD = 5V
28
mA
Digital supply current
DVDD, AVDD = 5V
22
mA
Standby supply current (all PRs set)
DVDD, AVDD = 5V
10
uA
Analogue supply current
DVDD, AVDD = 3.3V
17
mA
Digital supply current
DVDD, AVDD = 3.3V
13
mA
Standby supply current (all PRs set)
DVDD, AVDD = 3.3V
10
uA
Note:
1.
Both supplies should be powered on and off at the same time.
Production Data
WM9708
w
PD Rev 3.0 November 2002
5
ELECTRICAL CHARACTERISTICS
Test Characteristics:
AVDD = 5V, GND = 0V ..............T
A
= 25
o
C, unless otherwise stated
DVDD = 3.3V, GND = 0V ..............T
A
= 25
o
C, unless otherwise stated
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
DigitalLogic Levels (DVDD = 3.3 or 5.0V)
Input LOWlevel
V
IL
AGND -0.3
0.8
V
Input HIGH level
V
IH
2.2
AVDD +0.3
V
Output LOWV
OL
0.10 x VDD
V
Output HIGH
V
OH
0.90 x VDD
V
Analogue I/O Levels (Input Signals on any inputs, Outputs on LINEOUT L, R and MONOOUT)
Input level
Minimum input
impedance = 10k
AGND
-100mV
AVDD
+100mV
V
Output level
Into 10kohm load
AGND
+300mV
Near rail to
rail
AVDD
-300mV
V
Reference Levels
Reference input/output
CAP2
2/5 AVDD
AVDD/2
3/5 AVDD
V
CAP2 impedance
75
kohms
Mixer reference
VREF
Buffered
CAP2
V
MIC reference
VREFOUT
Buffered
CAP2
V
MIDBUFF current sink
(pins VREF and VREFOUT)
AVDD = 5V
-5
-15
mA
MIDBUFF current source
(pins VREF and VREFOUT)
AVDD = 5V
5
15
mA
MIDBUFF current source
(pins VREF and VREFOUT)
AVDD = 3.3V
10
mA
MIDBUFF current sink
(pins VREF and VREFOUT)
AVDD = 3.3V
-10
mA
DAC Circuit Specifications (AVDD = 5V) 48kHz sampling
SNR A-weighted (Note 1)
85
95
dBv
Full scale output voltage
VREF = 2.5V
1.0
Vrms
THD
-3dBfs input
74 (0.02%)
90
dBv
Frequency response
20
19,200
Hz
Transition band
19,200
28,800
Hz
Stop band
28,800
Hz
Out of band rejection
-40
dB
Spurious tone reduction
-100
dB
PSRR
20 to 20kHz
40
dB
ADC Circuit Specifications (AVDD = 5V) 48kHz sampling
SNR A-weighted (Note 1)
75
92
dB
ADC input for full scale output
VREF = 2.5V
1.0
Vrms
THD
-6dBv input
74
95
dB
Frequency response
20
19,200
Hz
Transition band
19,200
28,800
Hz
Stop band
28,800
Hz
Stop band rejection
-74
dB
PSRR
20 to 20kHz
40
dB