WM8718
Production Data
DC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
DVDD
TEST CONDITIONS
MIN
3.0
TYP
MAX
5.5
UNIT
V
Digital supply range
Analogue supply range
Ground
AVDD
3.0
5.5
V
AGND, DGND
0
0
V
Difference DGND to AGND
Supply current
-0.3
0.191a
+0.3
V
AVDD = 3.3V
19
mA
AVDD = 5V
DVDD = 3.3V
DVDD = 5V
0.191a
160 uA
160 uA
22
7.1
8.3
mA
mA
mA
Supply current
Notes:
1. This value represents the current usage when there are no switching digital inputs, MCLK is applied and the chip is in
power down mode
2. Digital supply DVDD must never be more than 0.3V greater than AVDD.
ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD = 5V, DVDD = 3.3V, AGND, DGND = 0V, TA = +25oC, fs = 48kHz, MCLK = 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
Output LOW
VOL
VOH
I
OL = 1mA
AGND + 0.3V
Output HIGH
I
OH = 1mA
DVDD – 0.3V
Analogue Reference Levels
Reference voltage
VMID
AVDD/2 -
50mV
AVDD/2
8.7k
AVDD/2 +
50mV
V
Potential divider resistance
RVMID
Ω
DAC Output (Load = 10kΩ 50pF)
0dBFs Full scale output voltage
At DAC outputs
2 x
AVDD/5
111
Vrms
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
@ fs = 96kHz
A-weighted
105
109
109
105
dB
dB
@ fs = 192kHz
A-weighted,
dB
@ fs = 48kHz
AVDD = 3.3V
A-weighted
SNR (Note 1,2,3)
102
dB
@ fs = 96kHz
AVDD = 3.3V
SNR (Note 1,2,3)
Non ‘A’ weighted @ fs
= 48kHz
108
dB
THD (Note 1,2,3)
1kHz, 0dBFs
-100
111
100
-80
dB
dB
dB
THD+N (Dynamic range, Note 2)
DAC channel separation
1kHz, -60dBFs
105
PD Rev 4.1 March 2004
6
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
