Pre-Production
WM8904
Differential Stereo Line Record - IN2L+IN3L / IN2R+IN3R pins to ADC output
Test conditions:
L_MODE = R_MODE = 01b (Differential Line)
LIN_VOL = RIN_VOL = 00101b (0dB)
Total signal path gain = 0dB
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
1.00
0
MAX
UNIT
Vrms
dBV
Vpk-pk
mV
Line Input Full Scale Signal Level
applied to IN2L or IN2R (for ADC
0dBFS output)
2.83
IN3L, IN3R input range
Input Resistance
Rin
Cin
9
12
10
80
k
Input Capacitance
Signal to Noise Ratio
pF
SNR
A-weighted
dB
ADC_OSR128 = 0
ADC_128_OSR_TST_
MODE = 1
ADC_BIASx1P5 = 1
A-weighted
81
91
Best performance
mode::
ADC_OSR128 = 1
ADC_128_OSR_TST_
MODE = 0
ADC_BIASx1P5 = 0
-1dBV input
Total Harmonic Distortion + Noise
Common Mode Rejection Ratio
Channel Separation
THD+N
CMRR
-78
60
-66
dB
dB
dB
1kHz, 100mV pk-pk
1kHz signal, -1dBV
10kHz signal, -1dBV
1kHz signal, -1dBV
217Hz, 100mVpk-pk
1kHz, 100mV pk-pk
85
80
Channel Level Matching
+/-1
55
dB
dB
Power Supply Rejection Ratio
PSRR
55
PP, Rev 3.3, September 2012
13
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
