WM8988 Просмотр технического описания (PDF) - Wolfson Microelectronics plc
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WM8988 Datasheet PDF : 56 Pages
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Production Data
WM8988
Test Conditions
DCVDD = 1.5V, DBVDD = 2.4V, AVDD = HPVDD =2.4V , TA = +25oC, 1kHz signal, fs = 48kHz, PGA gain = 0dB, 24-bit audio
data unless otherwise stated.
PARAMETER
SYMBOL TEST CONDITIONS
MIN
TYP
MAX
UNIT
DAC to Line-Out (L/ROUT1 or L/ROUT2 with 10kΩ / 50pF load)
Signal to Noise Ratio
SNR AVDD=3.3V DACMIXBIAS=0 88
100
dB
(A-weighted)
HPCOM=LC DACMIXBIAS=1
99
OM=0
AVDD = 2.4V DACMIXBIAS=0
97
HPCOM=LC DACMIXBIAS=1 88
96
OM=1
AVDD=1.8V DACMIXBIAS=0
96
HPCOM=LC DACMIXBIAS=1 85
95
OM=0
Total Harmonic Distortion
THD AVDD=3.3V DACMIXBIAS=0
-90
-75
dB
HPCOM=LC DACMIXBIAS=1
-89
OM=0
AVDD = 2.4V DACMIXBIAS=0
-83
HPCOM=LC DACMIXBIAS=1
OM=1
-82
-75
AVDD=1.8V DACMIXBIAS=0
-80
HPCOM=LC DACMIXBIAS=1
OM=0
-79
-65
Total Harmonic Distortion +
Noise
THD+N
AVDD=3.3V DACMIXBIAS=0
HPCOM=LC DACMIXBIAS=1
OM=0
-88
-70
dB
-87
AVDD = 2.4V DACMIXBIAS=0
-75
HPCOM=LC DACMIXBIAS=1
OM=1
-74
-70
AVDD=1.8V DACMIXBIAS=0
-75
HPCOM=LC DACMIXBIAS=1
OM=0
-74
-65
Channel Separation
1kHz signal
100
dB
10kHz signal
85
dB
Ground noise rejection
10mV, 20kHz noise on
40
dB
LCOM/HPCOM, LCOM/HPCOM
enabled
Headphone Output (LOUT1/ROUT1, LOUT2/ROUT2 AC coupled to load)
Output Power per channel
PO
Output power is very closely correlated with THD; see below.
Total Harmonic Distortion
THD
HPVDD=1.8V, RL=32Ω
0.013
%
PO=5mW
-78
dB
HPCOM=LCOM=0
DACMIXBIAS=1
HPVDD=1.8V, RL=16Ω
PO=5mW
HPCOM=LCOM=0
0.010
-80
DACMIXBIAS=1
HPVDD=2.4V, RL=32Ω,
PO=5mW
HPCOM=LCOM=1
0.010
-80
DACMIXBIAS=1
HPVDD=2.4V, RL=16Ω,
PO=5mW
HPCOM=LCOM=1
0.013
-78
0.032
-70
DACMIXBIAS=1
w
PD, Rev 4.0, October 2008
7
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