WM8728
Product Preview
DC ELECTRICAL CHARACTERISTICS
PARAMETER
Digital supply range
Analogue supply range
Ground
Difference DGND to AGND
Analogue supply current
Digital supply current
Analogue supply current
Digital supply current
AVDD = 5V
DVDD = 5V
AVDD = 3.3V
DVDD = 3.3V
SYMBOL
DVDD
AVDD
AGND, DGND
-0.3
TEST CONDITIONS
MIN
3.0
3.0
0
0
19
8
18
4
+0.3
TYP
MAX
5.5
5.5
UNIT
V
V
V
V
mA
mA
mA
mA
ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD, DVDD = 5V, AGND = 0V, DGND = 0V, T
A
= +25
o
C, fs = 48kHz, MCLK = 256fs unless otherwise stated.
PARAMETER
Digital Logic Levels (TTL Levels)
Input LOW level
Input HIGH level
Output LOW
Output HIGH
Analogue Reference Levels
Reference voltage
VMID
(VREFP -
VREFN)/2 -
50mV
(VREFP -
VREFN)/2
12k
At DAC outputs
A-weighted,
@ fs = 48kHz
A-weighted
@ fs = 96kHz
A-weighted
@ fs = 192kHz
A-weighted,
@ fs = 48kHz
AVDD, DVDD = 3.3V
A-weighted
@ fs = 96kHz
AVDD, DVDD = 3.3V
Non ‘A’ weighted @ fs
= 48kHz
1kHz, 0dBFs
1kHz, -60dBFs
100
1.1 x
AVDD/5
106
106
106
105
(VREFP -
VREFN)/2 +
50mV
V
V
IL
V
IH
V
OL
V
OH
I
OL
= 1mA
I
OH
= 1mA
AVDD – 0.3V
2.0
AGND + 0.3V
0.8
V
V
V
V
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Potential divider resistance
DAC Output (Load = 10k ohms. 50pF)
0dBFs Full scale output voltage
SNR (Note 1,2,3)
SNR (Note 1,2,3)
SNR (Note 1,2,3)
SNR (Note 1,2,3)
R
VMID
ohms
Vrms
dB
dB
dB
dB
SNR (Note 1,2,3)
103
dB
SNR (Note 1,2,3)
THD (Note 1,2,3)
THD+N (Dynamic range, Note 2)
DAC channel separation
Analogue Output Levels
Output level
106
-97
100
106
100
dB
dB
dB
dB
V
RMS
V
RMS
Load = 10k Ohms,
0dBFS
Load = 10k Ohms,
0dBFS,
(AVDD = 3.3V)
1.1
0.726
Gain mismatch
channel-to-channel
±1
%FSR
WOLFSON MICROELECTRONICS LTD
PP Rev 1.2 April 2001
4
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
