WM8781
Production Data
ELECTRICAL CHARACTERISTICS
Test Conditions
DVDD = 3.3V, AVDD = 5.0V, TA = +25oC, 1kHz signal, A-weighted, fs = 48kHz, MCLK = 256fs, 24-bit audio data, Slave Mode
unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ADC Performance
Full Scale Input Signal Level
(for ADC 0dB Input)
1
V
.0
rms
Input resistance, using
recommended external resistor
network on p17.
10
kΩ
Input capacitance
20
pF
dB
Signal to Noise Ratio
(see Terminology note 1,2,4)
SNR
SNR
THD
A-weighted,
@ fs = 48kHz
Unweighted,
@ fs = 48kHz
A-weighted,
93
93
102
100
100
dB
dB
@ fs = 48kHz, AVDD =
3.3V
Signal to Noise Ratio
(see Terminology note 1,2,4)
A-weighted,
@ fs = 96kHz
Unweighted,
@ fs = 96kHz
A-weighted,
99
99
99
dB
dB
dB
@ fs = 96kHz, AVDD =
3.3V
Total Harmonic Distortion
1kHz, -1dB Full Scale
@ fs = 48kHz
-91
-91
-90
dB
dB
dB
1kHz, -1dB Full Scale
@ fs = 96kHz
1kHz, -1dB Full Scale
@ fs = 192kHz
Dynamic Range
DNR
-60dBFS
93
102
90
dB
dB
Channel Separation
1kHz Input
(see Terminology note 4)
Channel Level Matching
Channel Phase Deviation
Power Supply Rejection Ratio
1kHz signal
1kHz signal
0.1
0.0001
50
dB
Degree
dB
PSRR
1kHz 100mVpp, applied
to AVDD, DVDD
Digital Logic Levels (TTL Levels)
Input LOW level
VIL
VIH
0.8
+1
V
Input HIGH level
2.0
-1
V
Input leakage current – digital pad
0.2
85
µA
µA
Input leakage current – digital
tristate input (Note 3)
Input capacitance
Output LOW
5
pF
V
VOL
VOH
I
OL=1mA
0.1 x DVDD
Output HIGH
I
OH= -1mA
0.9 x DVDD
V
PD, April 2006, Rev 4.1
6
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
