WM8904
Pre-Production
INPUT SIGNAL PATH
Single-ended Stereo Line Record - IN1L+IN1R pins to ADC output
Test conditions:
L_MODE = R_MODE = 00b (Single ended)
LIN_VOL = RIN_VOL = 00101b (0dB)
Total signal path gain = 6dB, incorporating 6dB single-ended to differential conversion gain
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
0.50
-6
MAX
UNIT
Vrms
dBV
Vpk-pk
k
Full Scale Input Signal Level (for
ADC 0dBFS).
1.41
12
Input Resistance
Rin
Cin
9
Input Capacitance
Signal to Noise Ratio
10
pF
SNR
A-weighted
80
dB
ADC_OSR128 = 0
ADC_128_OSR_TST_
MODE = 1
ADC_BIASx1P5 = 1
A-weighted
80
90
ADC_OSR128 = 1
ADC_128_OSR_TST_
MODE = 0
ADC_BIASx1P5 = 0
-7dBV input
Total Harmonic Distortion + Noise
Channel Separation
THD+N
PSRR
-78
85
-66
dB
dB
1kHz signal, -7dBV
10kHz signal, -7dBV
1kHz signal, -7dBV
217Hz, 100mVpk-pk
1kHz, 100mV pk-pk
80
Channel Level Matching
+/-1
45
dB
dB
Power Supply Rejection Ratio
55
PP, Rev 3.3, September 2012
12
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
