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Электронный компонент: WM9701

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WM9701A
Low Power AC'97 Multimedia Audio Codec
Production Data, January 2001, Rev 3.2
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
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
.
DESCRIPTION
The WM9701A is a high-quality stereo audio codec compliant
with the Intel AC'97 Rev 1.03 specification. Forming the
analogue component PC audio solution, it performs full-duplex
18-bit codec functions at 48 ksamples/s and offers excellent
audio quality with high SNR.
In addition, the WM9701A provides a comprehensive analogue
mixer with 4 sets of stereo inputs, plus phone, 2 microphone,
and PC-beep inputs. On-chip reference circuits generate the
necessary bias voltages for the device, and a 5-pin digital bi-
directional serial interface allows transfer of control data and
DAC and ADC words to and from the AC'97 controller.
The WM9701A is particularly suited to low power applications
such as notebook PCs.
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
APPLICATIONS
Notebook
PC
PC sound cards
Motherboards
BLOCK DIAGRAM
LINEIN (23,24)
VIDEO (16,17)
PCBEEP (12)
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
(37) MONOOUT
(35,36) LINEOUT
CD (18,20)
AUX (14,15)
PHONE (13)
MIC[1] (21)
MIC[2] (22)
0dB/
20dB
(6) BITCLK
(10) SYNC
(8) SDATAIN
(5) SDATAOUT
(11) RESETB
OSC
(2) XTLIN
(3) XTLOUT
VOL/
MUTE
STEREO
DAC
VOL
STEREO
ADC
VOL/
MUTE
MUX
VOL/
MUTE
VOL/
MUTE
MUX
KEY:
MONO
STEREO
RECORD
MUX
AND
MUTE
SERIAL
I/F
WM9701A
WM9701A
Production Data
WOLFSON MICROELECTRONICS LTD.
PD Rev 3.2 January 2001
2
ORDERING INFORMATION
PIN CONFIGURATION
DEVICE
TEMP. RANGE
PACKAGE
WM9701ACFT/V
0
o
to 70
o
C
48-pin TQFP
LIN
E
IN
R
CDL
MI
C
2
CDG
N
D
CDR
MI
C
1
LIN
E
IN
L
AUXR
PHO
N
E
AUXL
VI
DEO
L
VI
DEO
R
DVDD1
DVSS2
BITCLK
SDATAOUT
DVSS1
XTLOUT
XTLIN
SDATIN
DVDD2
SYNC
RESETB
PCBEEP
NC
NC
NC
NC
NC
NC
AVDD2
NC
NC
NC
AVSS2
LINEOUTR
NC
NC
CAP2
NC
NC
LINEOUTL
AVDD1
AVSS1
VREF
VREFOUT
NC
MON
OOU
T
1
9
8
7
6
5
4
3
2
12
11
10
24
23
16 17 18 19 20 21 22
13 14 15
25
31
30
29
28
27
26
36
35
34
33
32
37
47 46 45 44 43 42 41 40 39 38
48
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
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
AVSS -0.3V
AVDD +0.3V
Operating temperature range, T
A
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).
Production Data
WM9701A
WOLFSON MICROELECTRONICS LTD.
PD Rev 3.2 January 2001
3
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Digital supply range
DVDD1, DVDD2
Note 1
-10%
3.3 to 5.0
+10%
V
Analogue supply range
AVDD1, AVDD2
Note 1
-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
25
mA
Digital supply current
DVDD, AVDD = 5V
10
mA
Standby supply current (all PRs set)
DVDD, AVDD = 5V
30
A
Analogue supply current
DVDD, AVDD = 3.3V
15
mA
Digital supply current
DVDD, AVDD = 3.3V
6
mA
Standby supply current (all PRs set)
DVDD, AVDD = 3.3V
20
A
Note:
1.
Both supplies should be powered on and off at the same time.
ELECTRICAL CHARACTERISTICS
Test Conditions:
AVDD = 5V, GND = 0V, DVDD = 3.3V, GND = 0V, T
A
= 0
o
C to +70
o
C, unless otherwise stated.
PARAMETER
SYMBOL
TEST 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
0.1
VDD
V
Output HIGH
V
OH
0.9
VDD
V
Analogue I/O Levels (Input Signals on any Inputs, Outputs on LINEOUT L, R and MONO)
Input level
Minimum input
impedance = 10k
AVSS
-100mV
AVDD
+100mV
V
Output level
Into 10kohm load
AVSS
+100mV
Near rail to
rail
AVDD
-100mV
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
5
mA
WM9701A
Production Data
WOLFSON MICROELECTRONICS LTD.
PD Rev 3.2 January 2001
4
Test Conditions:
AVDD = 5V, GND = 0V, DVDD = 3.3V, GND = 0V, T
A
= 0
o
C to +70
o
C, unless otherwise stated.
DAC Circuit Specifications 48kHz Sampling
AVDD = 5V
85
96
dB
SNR A-weighted (Note 1)
AVDD = 3.3V
93
dB
VREF
= 2.5V
1.0
Vrms
Full scale output voltage
VREF
= 1.65V
0.66
Vrms
THD
-3dBFS input
74 (0.2%)
90
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
46
dB
ADC Circuit Specifications 48kHz Sampling
AVDD = 5V
75
92
dB
SNR A-weighted (Note 1)
AVDD = 3.3V
90
dB
VREF
= 2.5V,
AVDD = 5V
1.0
Vrms
ADC input for full scale output
VREF
= 1.65V,
AVDD = 3.3V
0.66
Vrms
THD
-6dBV input
74
90
dB
Frequency response
20
19,200
Hz
Transition band
19,200
28,800
Hz
Stop band
28,800
Hz
Stop band rejection
-74 (0.2%)
dB
PSRR
20 to 20kHz
40
dB
Mixer Circuit Specifications 48kHz Sampling
AVDD = 5V
90
95
dB
SNR CD path A-weighted
(Note 1)
AVDD = 3.3V
93
dB
AVDD = 5V
85
95
dB
SNR Other paths A-weighted
(Note 1)
AVDD = 3.3V
93
dB
AVSS
1.0
AVDD
Vrms
Maximum input voltage
0.66
Maximum output voltage on
LINEOUT
1.0
Vrms
THD
0dBV input
-74 (0.2%)
-92
dB
Frequency response (+/-1dB)
20
20,000
Hz
Input impedance (CD inputs)
At any gain
10
15
kohm
At max gain
10
20
kohm
Input impedance (other mixer
inputs)
At 0db gain
100
kohm
At max gain
80
kohm
Input impedance MIC inputs
At 0db gain
10
15
kohm
PSRR
20 to 20kHz
40
dB
Clock Frequency Range
Crystal clock
24.576
MHz
BIT_CLK frequency
12.288
MHz
SYNC frequency
48.0
kHz
Note:
1.
SNR is the ratio of 0dB full scale signal level to output level with no signal present, A-weighted and 20 - 20kHz bandwidth.
Production Data
WM9701A
WOLFSON MICROELECTRONICS LTD.
PD Rev 3.2 January 2001
5
SERIAL INTERFACE
Test Conditions:
AVDD = 5V, GND = 0V, DVDD = 3.3V, GND = 0V, T
A
= 0
o
C to +70
o
C, unless otherwise stated. All
measurements are taken at 10% to 90% VDD, unless otherwise stated.
All the following timing information is guaranteed, not tested.
AC-LINK LOW POWER MODE
SYNC
BIT_CLK
SDATA_OUT
WRITE
TO 0X20
DATA PR4
DON'T
CARE
SDATA_IN
SLOT 1
SLOT 2
t
S2_PDOWN
Figure 1 AC-Link Power down Timing
PARAMETER
SYMBOL
MIN
TYP
MAX
UNIT
End of slot 2 to BIT_CLK
SDATA_IN low
t
S2_PDOWN
1.0
s
COLD RESET
RESETB
BIT_CLK
t
RST_LOW
t
RST2CLK
Figure 2 Cold Reset Timing
PARAMETER
SYMBOL
MIN
TYP
MAX
UNIT
RESETB active low pulse width
t
RST_LOW
1.0
s
RESETB inactive to BIT_CLK
startup delay
t
RST2CLK
162.8
ns