WM8772
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Digital supply range
Analogue supply range
Ground
Difference DGND to AGND
Note:
Digital supply DVDD must never be more than 0.3V greater than AVDD.
SYMBOL
DVDD
AVDD, VREFP
AGND, VREFN, DGND
-0.3
TEST CONDITIONS
MIN
2.7
2.7
0
0
+0.3
TYP
MAX
3.6
5.5
Production Data
UNIT
V
V
V
V
ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD, VREFP = 5V, DVDD = 3.3V, AGND, VREFN = 0V, DGND = 0V, T
A
= +25
o
C, fs = 48kHz, MCLK = 256fs, 32-pin TQFP
version unless otherwise stated. ADC/DAC in Slave Mode unless otherwise stated.
PARAMETER
0dBFs Full scale output voltage
SNR (Note 1,2,4)
SNR (Note 1,2,4)
SNR (Note 1,2,4)
SNR (Note 1,2,4)
A-weighted,
@ fs = 48kHz
A-weighted
@ fs = 96kHz
A-weighted
@ fs = 192kHz
A-weighted
@ fs = 48kHz, AVDD =
3.3V
A-weighted
@ fs = 96kHz, AVDD =
3.3V
DNR
A-weighted, -60dB full
scale input
1kHz, 0dB.Fs
1kHz Input, 0dB gain
PSRR
1kHz 100mV
p-p
20Hz to 20kHz
100mV
p-p
90
95
SYMBOL
TEST CONDITIONS
MIN
TYP
1.0 x
VREFP/5
103
102
101
99
MAX
UNIT
V
rms
dB
dB
dB
dB
DAC Performance (Load = 10kΩ, 50pF)
SNR (Note 1,2,4)
99
dB
Dynamic Range (Note 2,4)
Total Harmonic Distortion (THD)
Mute Attenuation
DAC channel separation
Power Supply Rejection Ratio
103
-90
100
100
50
45
-80
dB
dB
dB
dB
dB
dB
w
PD Rev 4.2 October 2005
10
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
