WM8781 Datasheet, PDF (6/21 Pages) Wolfson Microelectronics plc – 24-Bit, 192kHz Stereo ADC

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
ADC Performance
Full Scale Input Signal Level
(for ADC 0dB Input)
Input resistance, using
recommended external resistor
network on p17.
Input capacitance
Signal to Noise Ratio
SNR
A-weighted,
93
(see Terminology note 1,2,4)
@ fs = 48kHz
Unweighted,
@ fs = 48kHz
A-weighted,
@ fs = 48kHz, AVDD =
3.3V
Signal to Noise Ratio
SNR
A-weighted,
93
(see Terminology note 1,2,4)
@ fs = 96kHz
Unweighted,
@ fs = 96kHz
A-weighted,
@ fs = 96kHz, AVDD =
3.3V
Total Harmonic Distortion
THD
1kHz, -1dB Full Scale
@ fs = 48kHz
1kHz, -1dB Full Scale
@ fs = 96kHz
1kHz, -1dB Full Scale
@ fs = 192kHz
Dynamic Range
DNR
-60dBFS
93
Channel Separation
(see Terminology note 4)
1kHz Input
Channel Level Matching
1kHz signal
Channel Phase Deviation
1kHz signal
Power Supply Rejection Ratio
PSRR
1kHz 100mVpp, applied
to AVDD, DVDD
Digital Logic Levels (TTL Levels)
Input LOW level
V_IL
TYP
1.0
10
20
102
100
100
99
99
99
-91
-91
-90
102
90
0.1
0.0001
50
MAX
UNIT
V_rms
kΩ
pF
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Degree
dB
0.8
V
Input HIGH level
VIH
Input leakage current – digital pad
Input leakage current – digital
tristate input (Note 3)
Input capacitance
Output LOW
V_OL
Output HIGH
V_OH
I_OL=1mA
I_OH= -1mA
2.0
V
-1
±0.2
+1
µA
85
µA
5
pF
0.1 x DVDD
V
0.9 x DVDD
V
w
PD, January 2012, Rev 4.5
6