WM9703
AC’97 Revision 2.1 Audio Codec
Production Data, January 2001, Rev 3.4
DESCRIPTION
WM9703 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 3D
sound and line-level outputs. In addition, support is
provided for variable sample rates and accommodation is
made for master/slave mode operation.
WM9703 is interchangeable with AC’97 codecs from
Wolfson and other suppliers. The WM9703 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
Low power implementation
Very low standby power
AC’97 REVISION 2.1 FEATURES
•
•
•
•
•
•
Variable rate audio (VRA) support
Analogue 3D stereo enhancement
Line level outputs
Supports Revision. 2.1 specified modem sample rates
and filtering
Master/slave ID selection
PC-beep connection when device held reset
BLOCK DIAGRAM
VOL/
MUTE
VOL/
MUTE
Σ
VOL/
MUTE
VOL/
MUTE
(35,36) LINEOUT
(39,41) LNLVLOUT
Σ
KEY:
MONO
STEREO
VOL
STEREO
DAC
MUX
VOL/
MUTE
(37) MONOOUT
SRC
(47) EAPD
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
3D
(6) BITCLK
Σ
Σ
WM9703
SERIAL
I/F
(10) SYNC
(8) SDATAIN
(5) SDATAOUT
(11) RESETB
CD (18,20)
LINEIN (23,24)
VIDEO (16,17)
AUX (14,15)
PHONE (13)
PCBEEP (12)
MIC[1] (21)
MUX
MIC[2] (22)
VOL
RECORD
MUX
AND
MUTE
0dB/
20dB
STEREO
ADC
SRC
MASTER/
SLAVE
SELECT
(45) CID[0]
(46) CID[1]
(2) XTLIN
(3) XTLOUT
OSC
WOLFSON MICROELECTRONICS LTD
Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK
Tel: +44 (0) 131 667 9386
Fax: +44 (0) 131 667 5176Email: sales@wolfson.co.uk
http://www.wolfson.co.uk
Production Data
datasheets contain final
specifications current on publication date.
Supply of products conforms to Wolfson
Microelectronics’ Terms and Conditions.
2001 Wolfson Microelectronics Ltd
.
WM9703
PIN CONFIGURATION
LINEOUTR
LINEOUTL
VREFOUT
AVDD1
AFILT1
AVSS1
CX3D2
CX3D1
VREF
CAP2
CAP1
Production Data
ORDERING INFORMATION
DEVICE
TEMP. RANGE
0 to 70
o
C
PACKAGE
48-pin TQFP
WM9703CFT/V
NC
36
35
34
33
32
31
30
29
28
27
MONOOUT
AVDD2
LNLVLOUTL
NC
LNLVLOUTR
AVSS2
NC
NC
CID0
CID1
EAPD
NC
37
38
39
40
41
42
43
44
45
46
47
48
10
11
12
1
2
3
4
5
6
7
8
9
26
25
24
23
22
21
20
LINEINR
LINEINL
MIC2
MIC1
CDR
CDGND
CDL
VIDEOR
VIDEOL
AUXR
AUXL
PHONE
WM9703
19
18
17
16
15
14
13
SDATAOUT
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 and JEDEC A113-B, 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.
CONDITION
Digital supply voltage
Analogue supply voltage
Voltage range digital inputs
Voltage range analogue inputs
Operating temperature range, T
A
Storage temperature
Package body temperature (soldering 10 seconds)
Package body temperature (soldering 2 minutes)
MIN
-0.3V
-0.3V
DVSS -0.3V
AVDD -0.3V
0C
-65
o
C
o
PCBEEP
DVDD1
DVDD2
DVSS1
DVSS2
RESETB
XTLOUT
BITCLK
XTLIN
SDATIN
SYNC
MAX
+7V
+7V
DVDD +0.3V
AVDD +0.3V
+70
o
C
+150
o
C
+240
o
C
+183
o
C
Note:
1.
The digital supply voltage (DVDD) must always be less than or equal to the analogue supply voltage (AVDD).
WOLFSON MICROELECTRONICS LTD
PD Rev 3.4 January 2001
2
Production Data
WM9703
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Digital supply range
Analogue supply range
Digital ground
Analogue ground
Difference DVSS to AVSS
Analogue supply current
Digital supply current
Standby supply current (all PRs set)
Analogue supply current
Digital supply current
Standby supply current (all PRs set)
DVDD, AVDD = 5V
DVDD, AVDD = 5V
DVDD, AVDD = 5V
DVDD, AVDD = 3.3V
DVDD, AVDD = 3.3V
DVDD, AVDD = 3.3V
SYMBOL
DVDD1, DVDD2
AVDD1, AVDD2
DVSS1, DVSS2
AVSS1, AVSS2
-0.3
TEST CONDITIONS
MIN
-10%
-10%
TYP
3.3 to 5.0
3.3 to 5.0
0
0
0
35
25
10
22
15
6
+0.3
MAX
+10%
+10%
UNIT
V
V
V
V
V
mA
mA
µA
mA
mA
µA
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
Input LOW level
Input HIGH level
Output LOW
Output HIGH
Input level
Output level
Reference Levels
Reference input/output
CAP2 impedance
Mixer reference
MIC reference
ADC reference
DAC reference
MIDBUFF current sink
(pins CAP1, AFILT2, VREF
and VREFOUT)
MIDBUFF current source
(pins CAP1, AFILT1, VREF
and VREFOUT)
MIDBUFF current source
(pins CAP1, AFILT1, VREF
and VREFOUT)
VREF
VREFOUT
CAP1
AFILT1
AVDD = 5V
-5
CAP2
2/5 AVDD
AVDD/2
75
Buffered
CAP2
Buffered
CAP2
Buffered
CAP2
Buffered
CAP2
-15
3/5 AVDD
V
kohms
V
V
V
V
mA
SYMBOL
V
IL
V
IH
V
OL
V
OH
Minimum input
impedance = 10k
Into 10kohm load
0.9 x DVDD
AVSS
-100mV
AVSS
+100mV
AVDD
+100mV
AVDD
-100mV
TEST CONDITIONS
MIN
AVSS -0.3
2.2
TYP
MAX
0.8
AVDD +0.3
0.1 x DVDD
UNIT
V
V
V
V
V
V
Digital Logic Levels (DVDD = 3.3 or 5.0V)
Analogue I/O Levels (Input Signals on any inputs, Outputs on LINEOUT L, R and MONOOUT)
Near rail to
rail
AVDD = 5V
5
15
mA
AVDD = 3.3V
5
mA
WOLFSON MICROELECTRONICS LTD
PD Rev 3.4 January 2001
3
WM9703
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
SNR A-weighted (Note 1)
Full scale output voltage
THD
Frequency response
Transition band
Stop band
Out of band rejection
Spurious tone reduction
PSRR
SNR A-weighted (Note 1)
ADC input for full scale output
THD
Frequency response
Transition band
Stop band
Stop band rejection
PSRR
SNR CD path A-weighted
(Note 1)
SNR Other paths A-weighted
(Note 1)
Maximum input voltage
Maximum output voltage on
LINEOUT
THD
Frequency response (+/-1dB)
Input impedance (CD inputs)
Input impedance (other mixer
inputs)
Input impedance Mic inputs
PSRR
SNR A-weighted (Note 1)
Full scale output voltage
THD
Frequency response
Transition band
Stop band
Out of band rejection
Spurious tone reduction
PSRR
20 to 20kHz
VREF = 1.65V
3dBFs input
20
19,200
28,800
-40
-100
40
At any gain
At max gain
At 0db gain
At max gain
At 0db gain
20 to 20kHz
0dBV input
20 to 20kHz
90
85
AVSS
1.0
74
20
10
10
15
20
100
80
15
40
96
0.7
90
19,200
28,800
Mixer Circuit Specifications (AVDD = 5V) 48kHz sampling
100
95
1.0
1.8
90
20,000
AVDD
VREF = 2.5V
-6dBV input
74
20
19,200
28,800
-74
40
20 to 20kHz
75
ADC Circuit Specifications (AVDD = 5V) 48kHz sampling
85
1.0
90
19,200
28,800
VREF = 2.5V
-3dBFs input
74
20
19,200
28,800
-40
-100
40
SYMBOL
TEST CONDITIONS
MIN
85
TYP
96
1.0
90
19,200
28,800
MAX
Production Data
UNIT
dB
Vrms
dB
Hz
Hz
Hz
dB
dB
dB
dB
Vrms
dB
Hz
Hz
Hz
dB
dB
dB
dB
Vrms
Vrms
dB
Hz
kohm
kohm
kohm
kohm
kohm
dB
dB
Vrms
dB
Hz
Hz
Hz
dB
dB
dB
DAC Circuit Specifications (AVDD = 5V) 48kHz sampling
10
DAC Circuit Specifications (AVDD = 3.3V) 48kHz sampling
WOLFSON MICROELECTRONICS LTD
PD Rev 3.4 January 2001
4
Production Data
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
SNR A-weighted (Note 1)
ADC input for full scale output
THD
Frequency response
Transition band
Stop band
Stop band rejection
PSRR
SNR CD path A-weighted
(Note 1)
SNR Other paths A-weighted
(Note 1)
Maximum input voltage
Maximum output voltage on
LINEOUT
THD
Frequency response (+/-1dB)
Input impedance (CD inputs)
Input impedance (other Mixer
inputs)
Input impedance MIC inputs
PSRR
Clock Frequency Range
Crystal clock
BIT_CLK frequency
SYNC frequency
Note:
1.
24.576
12.288
48.0
At any gain
At max gain
At 0db gain
At max gain
At 0db gain
20 to 20kHz
-3dBV input
20
15
20
100
80
15
40
20 to 20kHz
Mixer Circuit Specifications (AVDD = 3.3V) 48kHz sampling
97
92
0.7
0.7
90
20,000
VREF = 1.65V
-9dBV input
20
19,200
28,800
-74
40
SYMBOL
TEST CONDITIONS
MIN
TYP
82
0.7
80
19,200
28,800
MAX
WM9703
UNIT
dB
Vrms
dB
Hz
Hz
Hz
dB
dB
dB
dB
Vrms
Vrms
dB
Hz
kohm
kohm
kohm
kohm
kohm
dB
MHz
MHz
kHz
ADC Circuit Specifications (AVDD = 3.3V) 48kHz sampling
SNR is the ratio of 0dB signal output level to the output level with no signal, measured A-weighted over a 20Hz to 20kHz
bandwidth.
WOLFSON MICROELECTRONICS LTD
PD Rev 3.4 January 2001
5
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