WM8740
Production Data
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Digital supply range
Analogue supply range
Ground
DVDD
AVDD
-10%
-10%
3.3 to 5
+10%
+10%
V
V
3.3 to 5
AGND, DGND
0
V
Difference DGND to AGND
Analogue supply current
Digital supply current
Analogue supply current
Digital supply current
-0.3
0
+0.3
V
AVDD = 5V
DVDD = 5V
AVDD = 3.3V
DVDD = 3.3V
13
19
12
12
mA
mA
mA
mA
Note:
DVDD must be equal to, or less than the AVDD supply (i.e. DVDD = AVDD = +5V; DVDD = AVDD = +3.3V; DVDD = +3.3V
AVDD = +5V).
ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD, DVDD = 5V, AGND, DGND = 0V, TA = +25oC, fs = 48kHz, SCKI = 256fs unless otherwise stated.
PARAMETER
DAC Circuit Specifications
SNR
SYMBOL
TEST CONDITIONS
MIN
110
-95
TYP
MAX
UNIT
Mono fs @ 48kHz
Stereo fs @ 48kHz
Stereo fs @ 96kHz
Mono 0dB
120
117
116
-104
-104
117
dB
dB
dB
dB
dB
dB
(See Note 1)
THD (full-scale)
(See Note 2)
Stereo 0dB
THD+N (Dynamic range)
(See Note 2)
-60dB
Filter Characteristics (Sharp Roll-off)
Passband
±0.0012 dB
0.4535fs
-82
dB
Stopband
-3dB
0.491fs
30/fs
Passband ripple
±0.0012
±0.001
dB
dB
s
Stopband attenuation
Delay time
f > 0.5465fs
Filter Characteristics (Slow Roll-off)
Passband
±0.001dB
0.274fs
0.459fs
Stopband
-3dB
Passband ripple
dB
dB
s
Stopband attenuation
Delay time
f > 0.732fs
-82
9/fs
Internal Analogue Filter
Bandwidth
-3dB
195
kHz
dB
Passband edge response
Digital Logic Levels
20kHz
-0.043
Input LOW level
Input HIGH level
Output LOW level
Output HIGH level
VIL
VIH
0.8
2.0
V
V
VOL
VOH
IOL = 2mA
IOH = 2mA
DGND + 0.3V
DVDD - 0.3V
PD Rev 4.0 April 2004
6
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
