WM8850
Pre-Production
Test Conditions
AVDD = CPVDD = 5V, DBVDD = 3.3V, DCVDD = 1.8V, TA = +25oC, 1kHz signal, fs = 48kHz, 24-bit data unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ADC2 Performance
Unweighted
A-weighted
100
103
103
103
-95
87
dB
dB
dB
dB
dB
dB
dB
dB
°
Signal to Noise Ratio
SNR
95
A-weighted
fs=96kHz
A-weighted
-60dBFS
Dynamic Range
DNR
THD
Total Harmonic Distortion
-1dBFS
-90
1kHz
20Hz to 20kHz
0dBFS
Channel Separation
84
Channel Level Matching
Channel Phase Deviation
0.1
0.01
90
1kHz, 100mVpp on AVDD
dB
dB
Power Supply Rejection
Ratio
PSRR
20Hz to 20kHz, 100mVpp on AVDD
70
Test Conditions
AVDD = CPVDD = 5V, DBVDD = 3.3V, DCVDD = 1.8V, TA = +25oC, 1kHz signal, fs = 48kHz, 24-bit data unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Microphone Bias Generator
0.5x
AVDD
VRefEn[2:0] = 001
VRefEn[2:0] = 100
V
V
Output Voltage
0.8x
AVDD
Current Source Capability
2.5
mA
dB
dB
1kHz, 100mVpp on AVDD
100
88
Power Supply Rejection
Ratio
PSRR
20Hz to 20kHz, 100mVpp on AVDD
PP, April 2011, Rev 3.2
16
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
