WM8728
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DC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
DVDD
TEST CONDITIONS
MIN
3.0
TYP
MAX
UNIT
V
Digital supply range
Analogue supply range
Ground
5.5
5.5
AVDD
3.0
V
AGND, DGND
0
0
V
Difference DGND to AGND
Analogue supply current
Digital supply current
Analogue supply current
Digital supply current
-0.3
+0.3
V
AVDD = 5V
DVDD = 5V
AVDD = 3.3V
DVDD = 3.3V
19
8
mA
mA
mA
mA
18
4
ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD, DVDD = 5V, AGND = 0V, 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
IOL = 1mA
IOH = 1mA
AGND + 0.3V
Output HIGH
AVDD – 0.3V
(VREFP -
Analogue Reference Levels
Reference voltage
VMID
(VREFP -
(VREFP -
V
VREFN)/2 - VREFN)/2 VREFN)/2 +
50mV
50mV
Potential divider resistance
RVMID
12k
ohms
DAC Output (Load = 10k ohms. 50pF)
0dBFs Full scale output voltage
At DAC outputs
1.1 x
AVDD/5
106
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
100
106
106
105
dB
dB
@ fs = 192kHz
A-weighted,
dB
@ fs = 48kHz
AVDD, DVDD = 3.3V
A-weighted
@ fs = 96kHz
AVDD, DVDD = 3.3V
SNR (Note 1,2,3)
SNR (Note 1,2,3)
103
106
dB
dB
Non ‘A’ weighted @ fs
= 48kHz
THD (Note 1,2,3)
1kHz, 0dBFs
-97
106
100
dB
dB
dB
THD+N (Dynamic range, Note 2)
DAC channel separation
Analogue Output Levels
Output level
1kHz, -60dBFs
100
Load = 10k Ohms,
0dBFS
1.1
VRMS
VRMS
Load = 10k Ohms,
0dBFS,
0.726
(AVDD = 3.3V)
Gain mismatch
±1
%FSR
channel-to-channel
WOLFSON MICROELECTRONICS LTD
PP Rev 1.2 April 2001
4
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
