WM8758B 查看數據表（PDF） - Wolfson Microelectronics plc
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WM8758B Datasheet PDF : 90 Pages
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WM8758B
Production Data
Test Conditions
DCVDD=1.8V, AVDD1=AVDD2=3.0V, DBVDD=3.3V, TA = +25oC, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise
stated.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
DAC to L/R Mix to Headphone (LOUT1/ROUT1, analogue volume controls set to 0dB)
Full-scale output
PGA gains set to 0dB
AVDD1/3.3
Vrms
Signal to Noise Ratio (Note 5,6)
SNR
A-weighted
100
dB
22Hz to 20kHz
95.5
dB
Total Harmonic Distortion
(Note 7)
THD
Po = 20mW
RL=16Ω
-75
dB
Po = 20mW
RL=32Ω
-79
dB
Total Harmonic Distortion + Noise
(Note 7)
THD+N
Po = 20mW
RL=16Ω
-75
dB
Po = 20mW
RL=32Ω
-79
dB
Channel Separation (Note 8)
1kHz signal
100
dB
Ground noise rejection
10mV, 20kHz noise on
40
dB
HPCOM, HPCOM enabled
DAC to L/R Mix to Headphone (LOUT2/ROUT2, analogue volume controls set to 0dB)
Full-scale output
PGA gains set to 0dB
AVDD1/3.3
Vrms
Signal to Noise Ratio (Note 5,6)
SNR
A-weighted
90
97
dB
22Hz to 20kHz
95.5
dB
Total Harmonic Distortion
(Note 7)
THD
Po = 20mW
RL=16Ω
-79
dB
Po = 20mW
RL=32Ω
-82
dB
Channel Separation (Note 8)
1kHz signal
100
dB
Ground noise rejection
10mV, 20kHz noise on
40
dB
LCOM, LCOM enabled
Bypass Paths to Output Mixers
Maximum PGA gain into mixer
+6
dB
Minimum PGA gain into mixer
-15
dB
PGA gain step into mixer
Guaranteed monotonic
3
dB
Mute attenuation
100
dB
Analogue Outputs (LOUT1, ROUT1, LOUT2, ROUT2)
Maximum Programmable Gain
+6
dB
Minimum Programmable Gain
-57
dB
Programmable Gain step size
Guaranteed monotonic
1
dB
Mute attenuation
1kHz, full scale signal
85
dB
w
PD, Rev 4.4, January 2012
10
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