Document Outline
- WM9707
- AC 97 Revision 2.1 Audio Codec with SPDIF Output
- DESCRIPTION
- AC 97 FEATURES
- BLOCK DIAGRAM
- PIN CONFIGURATION
- ORDERING INFORMATION
- DEVICE TEMP.RANGE WM9707CFT/V 0 to 70 o C 48-pin TQF DVDD1 DVSS2 BITCLK SDATAOUT DVSS1 XTLOUT XTLIN SDATIN DVDD2 SYNC RESETB PCBEEP MONOOUT AVSS2 LNLVL OUTR NC LNLVL OUTL AVDD2 SPDIF EAPD CI D SPDIF ENABLE NC PHONE LINEOUTR NC CAP2
- RECOMMENDED OPERATING CONDITIONS
- ELECTRICAL CHARACTERISTICS
- PIN DESCRIPTION
- DETAILED TIMING DIAGRAMS
- AC-LINK LOW POWER MODE
- COLD RESET
- WARM RESET
- CLOCK SPECIFICATIONS
- DATA SETUP AND HOLD (50pF EXTERNAL LOAD)
- SIGNALRISE AND FALLTIMES
- DEVICE DESCRIPTION
- INTRODUCTION
- 3D STEREO ENHANCEMENT
- VARIABLE SAMPLE RATE SUPPORT
- SPDIF DIGITALAUDIO DATA OUTPUT
- GAIN CONTROL REGISTER LOCATION
- MASTER/SLAVE ID SUPPORT
- CONTROL INTERFACE
- AC-LINK DIGITAL SERIAL INTERFACE PROTOCOL
- AC-LINK AUDIO OUTPUT FRAME (SDATAOUT)
- AC-LINK AUDIO INPUT FRAME (SDATAIN)
- AC-LINK LOW POWER MODE
- WAKING UP THE AC-LINK
- SERIAL INTERFACE REGISTER MAP DESCRIPTION
- REVISION 2.1 REGISTERS (INDEX 28h T0 58h)
- VENDOR RESERVED REGISTERS (INDEX 5Ah -7Ah)
- SERIALINTERFACE REGISTER MAP
- RECOMMENDED EXTERNALCOMPONENTS
- RECOMMENDED EXTERNAL COMPONENTS VALUES
- RECOMMENDATIONS FOR 3.3V OPERATION
- PACKAGE DIMENSIONS
- IMPORTANT NOTICE
WM9707
AC'97 Revision 2.1 Audio Codec with SPDIF Output
WOLFSON MICROELECTRONICS LTD
w :: www.wolfsonmicro.com
Production Data, October 2002, Rev 3.3
Copyright
2002 Wolfson Microelectronics Ltd.
DESCRIPTION
WM9707 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 withh
ighSNR.
Additional features include 3D sound enhancement, line-level
outputs, hardware sample rate conversion, master/slave mode
operation and SPDIF output.
WM9707 is interchangeable with AC'97 codecs from
Wolfson and other suppliers. The WM9707 is fully operable
on 3.3V or 5V or mixed 3.3/5V supplies, and is packaged in
the industry standard 48-pin TQFP package with 7mm body
size.
AC'97 FEATURES
3.3V or 5V operation
18-bit stereo codec
S/N ratio > 95dB
Multiple stereo input mixer
Mono and stereo volume control
48-pin TQFP package
Power management features
Very low standby power
Variable rate audio (VRA) support
Analogue 3D stereo enhancement
Line level outputs
Supports Rev. 2.1 specified audio sample rates
and filtering
Master/slave ID selection
PC-beep connection when device held reset
SPDIF digital output
BLOCK DIAGRAM
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
MONOOUT
LNLVLOUT
LINEOUT
CD
LINEIN
VIDEO
AUX
PHONE
PCBEEP
MIC1
MIC2
0dB/
20dB
MASTER/
SLAVE
SELECT
SPDIF
CID
BITCLK
SYNC
SDATAIN
SDATAOUT
EAPD
VOL/
MUTE
OSC
XTLIN
XTLOUT
VOL/
MUTE
STEREO
DAC
SRC
3D
VOL
STEREO
ADC
SRC
VOL/
MUTE
MUX
VOL/
MUTE
VOL/
MUTE
MUX
KEY:
MONO
STEREO
RECORD
MUX
AND
MUTE
SERIAL
I/F
VOL/
MUTE
SPDIF ENABLE
RESETB
WM9707
w
WM9707
Production Data
w
PD Rev 3.3 October 2002
2
PIN CONFIGURATION
ORDERING INFORMATION
DEVICE
TEMP. RANGE
PACKAGE
WM9707CFT/V
0 to 70
o
C
48-pin TQFP
DVDD1
DVSS2
BITCLK
SDATAOUT
DVSS1
XTLOUT
XTLIN
SDATIN
DVDD2
SYNC
RESETB
PCBEEP
M
O
N
O
O
U
T
A
V
S
S
2
L
N
L
V
L
O
U
T
R
N
C
L
N
L
V
L
O
U
T
L
A
V
D
D
2
S
P
D
I
F
E
A
P
D
C
I
D
S
P
D
I
F
E
N
A
B
L
E
N
C
PHO
N
E
CDG
N
D
AUXR
CDL
VI
DEO
R
VI
DEO
L
AUXL
MIC
2
LIN
E
I
N
R
LIN
E
I
N
L
MIC
1
CDR
LINEOUTR
NC
CAP2
CX3D1
CX3D2
LINEOUTL
AVDD1
AVSS1
VREF
VREFOUT
1
9
8
7
6
5
4
3
2
12
11
10
14
21
20
19
18
17
16
15
24
23
22
13
25
31
30
29
28
27
26
36
35
34
33
32
48
38
39
40
41
42
43
44
45
46
47
37
NC
NC
N
C
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.
As per specifications IPC/JEDEC J-STD-020A, this product requires specific storage conditions prior to surface mount assembly.
It has been classified as having a Moisture Sensitivity Level of 2 and as such will be supplied in vacuum-sealed moisture barrier
bags, withan out-of-bag exposure time limit of 1 year at less than 30
o
C/60% RH.
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, TA
0
o
C
+70
o
C
Storage temperature
-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).
WM9707
Production Data
w
PD Rev 3.3 October 2002
3
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOLTEST CONDITIONS
MIN
TYP
MAX
UNIT
Digital supply range
DVDD1, DVDD2
-10%
3.3 to 5.0
+10%
V
Analogue supply range
AVDD1, AVDD2
-10%
3.3 to 5.0
+10%
V
Digital ground
DVSS1, DVSS2
0
V
Analogue ground
AVSS1, AVSS2
0
V
Difference DVSS to AVSS
-0.3
0
+0.3
V
Analogue supply current
DVDD, AVDD = 5V
30
mA
Digital supply current
DVDD, AVDD = 5V
16
mA
Standby supply current (all PRs set)
DVDD, AVDD = 5V
10
uA
Analogue supply current
DVDD, AVDD = 3.3V
16
mA
Digital supply current
DVDD, AVDD = 3.3V
11
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.
ELECTRICAL CHARACTERISTICS
Test Characteristics:
AVDD = 5V, GND = 0V ..............T
A
= 0
o
C to +70
o
C, unless otherwise stated
DVDD = 3.3V, GND = 0V ..............T
A
= 0
o
C to +70
o
C, unless otherwise stated
PARAMETER
SYMBOLTEST CONDITIONS
MIN
TYP
MAX
UNIT
Digital Logic Levels (DVDD = 3.3 or 5.0V)
Input LOW level
V
IL
AVSS -0.3
0.8
V
Input HIGH level
V
IH
2.2
AVDD +0.3
V
Output LOW
V
OL
I
OL
= 1mA
0.10 x VDD
V
Output HIGH
V
OH
I
OL
= 1mA
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
AVSS
-100mV
AVDD
+100mV
V
Output level
Into 10kohm load
AVSS
+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
WM9707
Production Data
w
PD Rev 3.3 October 2002
4
Test Characteristics:
AVDD = 5V, GND = 0V ..............T
A
= 0
o
C to +70
o
C, unless otherwise stated
DVDD = 3.3V, GND = 0V ..............T
A
= 0
o
C to +70
o
C, unless otherwise stated
PARAMETER
SYMBOLTEST CONDITIONS
MIN
TYP
MAX
UNIT
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
90
dB
ADC input for full scale output
VREF = 2.5V
1.0
Vrms
THD
-6dBv input
74
-85
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
Mixer Circuit Specifications (AVDD = 5V) 48kHz sampling
SNR CD pathA-weighted
(Note 1)
90
100
dB
SNR Other paths A-weighted
(Note 1)
85
95
dB
Maximum input voltage
AVSS
1.0
AVDD
Vrms
Maximum output voltage on
LINEOUT
1.0
1.8
Vrms
THD
0dBv input
74
-90
dB
Frequency response (+/-1dB)
20
20,000
Hz
Input impedance (CD inputs)
At any gain
15
kohm
At max gain
10
20
kohm
Input impedance (other mixer
inputs)
At 0db gain
50
100
kohm
At max gain
10
30
kohm
Input impedance MIC inputs
At 0db gain
55
110
kohm
PSRR
20 to 20kHz
50
dB
DAC Circuit Specifications (AVDD = 3.3V) 48kHz sampling
SNR A-weighted (Note 1)
92
dB
Full scale output voltage
VREF = 1.65V
0.7
Vrms
THD
-3dBFS input
-85
dB
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
WM9707
Production Data
w
PD Rev 3.3 October 2002
5
Test Characteristics:
AVDD = 5V, GND = 0V ..............T
A
= 0
o
C to +70
o
C, unless otherwise stated
DVDD = 3.3V, GND = 0V ..............T
A
= 0
o
C to +70
o
C, unless otherwise stated
PARAMETER
SYMBOLTEST CONDITIONS
MIN
TYP
MAX
UNIT
ADC Circuit Specifications (AVDD = 3.3V) 48kHz sampling
SNR A-weighted (Note 1)
85
dB
ADC input for full scale output
VREF = 1.65V
0.7
Vrms
THD
-6dBv input
80
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
Mixer Circuit Specifications (AVDD = 3.3V) 48kHz sampling
SNR CD pathA-weighted
(Note 1)
95
dB
SNR Other paths A-weighted
(Note 1)
90
dB
Maximum input voltage
0.6
Vrms
Maximum output voltage on
LINEOUT
1.2
Vrms
THD (Note 2)
-3.6dBv input
85
dBv
Frequency response (+/-1dB)
20
20,000
Hz
Input impedance (CD inputs)
At any gain
15
kohm
At max gain
20
kohm
Input impedance (other Mixer
inputs)
At 0db gain
100
kohm
At max gain
30
kohm
Input impedance MIC inputs
At 0db gain
110
kohm
PSRR
20 to 20kHz
50
dB
Clock Frequency Range
Crystal clock
24.576
MHz
BITCLK frequency
12.288
MHz
SYNC frequency
48.0
kHz
Notes:
1.
SNR is the ratio of 0dB signal output to the output level with no signal, measured A-weighted over a 20Hz to 20kHz
bandwidth.
2.
Inputs are scaled for AVDD eg; 0dBv at 5.0V is equivalent to 3.6dBv at 3.3V.
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