Pre-Production
WM8904
High Performance Stereo Playback to Line-out - DAC input to LINEOUTL+LINEOUTR pins with 10k / 50pF load
Test conditions:
LINEOUTL_VOL = LINEOUTR_VOL = 111001b (0dB)
Low Power Playback mode disabled. (See Table 49 for details; note that Low Power Playback mode is disabled by default.)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
1.0
0
MAX
UNIT
Vrms
dBV
Full Scale Output Signal Level
DAC 0dBFS output at
0dB volume
2.83
Vpk-pk
mV
DC offset
DC servo enabled.
Calibration complete.
A-weighted
-1.5
90
+1.5
-70
Signal to Noise Ratio
SNR
96
-85
100
90
dB
dB
Total Harmonic Distortion + Noise
Channel Separation
THD+N
10k load
1kHz signal, 0dBFS
10kHz signal, 0dBFS
1kHz signal, 0dBFS
217Hz, 100mVpk-pk
1kHz, 100mV pk-pk
dB
dB
dB
Channel Level Matching
+/-1
62
Power Supply Rejection Ratio
PSRR
62
Low Power Stereo Playback to Line-out - DAC input to LINEOUTL+LINEOUTR pins with 10k / 50pF load
Test conditions:
LINEOUTL_VOL = LINEOUTR_VOL = 111001b (0dB),
Low Power Playback Mode enabled (see Table 48 for details)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
1.0
0
MAX
UNIT
Vrms
dBV
Full Scale Output Signal Level
DAC 0dBFS output at
0dB volume
2.83
95
Vpk-pk
dB
Signal to Noise Ratio
SNR
A-weighted
Total Harmonic Distortion + Noise
THD+N
10k load
-82
dB
Output PGAs (HP, LINE)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
dB
Minimum PGA gain setting
Maximum PGA gain setting
PGA Gain Step Size
PGA gain accuracy
-57
6
dB
1
dB
+6dB to -40dB
-40dB to -57dB
HPOUTL/R
-1.5
-1
+1.5
+1
dB
PGA gain accuracy
dB
Mute attenuation
85
85
dB
LINEOUTL/R
dB
PP, Rev 3.3, September 2012
17
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
