WM8746
Production Data
DC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
DVDD
TEST CONDITIONS
MIN
3.0
TYP
MAX
5.5
UNIT
Digital supply range
Analogue supply range
Ground
V
V
V
V
AVDD1, AVDD2
AGND, GR0,GR1, DGND
3.0
5.5
0
0
Difference DGND to AGND
-0.3
+0.3
Analogue supply current
Digital supply current
Analogue supply current
Digital supply current
Analogue supply current
Digital supply current
AVDD = 5V
DVDD = 5V
58
22
mA
mA
mA
mA
mA
mA
AVDD = 3.3V
57
DVDD = 3.3V
11
Power down, stop clock
Power down, stop clock
0.4
0.09
Note:
1. The digital supply voltages must not exceed the analogue supply voltages.
AC ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD = DVDD = 5V, AGND = 0V = DGND = 0V, TA = +25oC, fs = 48kHz, SCKI = 256fs unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Digital Logic Levels (TTL Levels)
Input LOW level
VIL
VIH
0.8
V
V
V
V
Input HIGH level
2.0
2.4
Output LOW
VOL
VOH
I
OL = 2mA
0.4
Output HIGH
IOH = 2mA
Analogue Reference Levels
Reference voltage
VCAP
RCAP
(AVDD2-
GR2)/2
V
Potential divider resistance
25k
Ω
DAC Output (Load = 10kΩ 50pF)
0dBFs Full scale output voltage
At DAC outputs
1.1 x
AVDD1/5
106
Vrms
dB
dB
dB
dB
SNR (Note 1,2,3)
SNR (Note 1,2,3)
SNR (Note 1,2,3)
SNR (Note 1,2,3)
A-weighted,
@ fs = 48kHz
A-weighted
100
105
105
103
@ fs = 96kHz
A-weighted
@ fs = 192kHz
A-weighted,
@ fs = 48kHz
AVDD=DVDD=3.3V
A-weighted
SNR (Note 1,2,3)
SNR (Note 1,2,3)
103
103
dB
dB
@ fs = 96kHz
AVDD=DVDD=3.3V
Non ‘A’ weighted @ fs
= 48kHz
AVDD=DVDD=5V
1kHz, 0dBFs
THD (Note 1,2,3)
-95
-106
100
dB
dB
dB
THD+N (Dynamic range, Note 2)
DAC channel separation
1kHz, -60dBFs
-100
March 2006, PD Rev 4.0
6
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
