WM8955LEFL 데이터 시트보기 (PDF) - Wolfson Microelectronics plc
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WM8955LEFL Datasheet PDF : 43 Pages
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WM8955L
ELECTRICAL CHARACTERISTICS
Test Conditions
DCVDD = 1.5V, AVDD = HPVDD = 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 Line-Out (LOUT1/2, ROUT1/2, MONOOUT with 10kΩ / 50pF load)
Signal to Noise Ratio
SNR
AVDD = 3.3V
98
dB
(A-weighted)
AVDD = 1.8V
95
Total Harmonic Distortion
THD
AVDD = 3.3V
-95
dB
AVDD = 1.8V
-90
Channel Separation
1kHz signal
90
dB
Analogue Mixer Inputs (LINEINL, LINEINR, MONOIN)
Full-scale Input Signal Level
VINFS
AVDD = 3.3V
1.0
V rms
AVDD = 1.8V
0.516
Signal to Noise Ratio
SNR
AVDD = 3.3V
95
dB
Line-in to Line-Out
(A-weighted)
AVDD = 1.8V
90
Total Harmonic Distortion
THD
AVDD = 3.3V
-92
dB
AVDD = 1.8V
-92
dB
Input Resistance
RLINEIN
PGA gain = 0dB
20
kΩ
(signal enters one mixer only)
PGA gain = +6dB
10
Input Resistance
PGA gain = 0dB
10
(signal enters two mixers)
PGA gain = +6dB
5
MONOIN- input resistance
Programmable Gain
RMONOIN-
any gain
20
kΩ
-15
+6
dB
Programmable Gain Step Size
Monotonic
3
dB
Mute Attenuation
TBD
dB
Analogue Outputs (LOUT1/2, ROUT1/2, MONOOUT)
0dB Full scale output voltage
AVDD/3.3
Vrms
Programmable Gain
1kHz signal
-67
+6
dB
Programmable Gain Steps
Monotonic
80
steps
Mute attenuation
1kHz, full scale signal
85
dB
Channel Separation
80
90
dB
Headphone Output (LOUT1/2, ROUT1/2 with 16 or 32 Ohm load)
Output Power per channel
Total Harmonic Distortion
PO
THD
Output power is very closely correlated with THD; see below.
HPVDD=1.8V, RL=32Ω
0.013
%
PO=5mW
-78
dB
HPVDD=1.8V, RL=16Ω
PO=5mW
0.013
-78
HPVDD=3.3V, RL=32Ω,
PO=20mW
0.01
-80
HPVDD=3.3V, RL=16Ω,
PO=20mW
0.01
-80
Signal to Noise Ratio
SNR
HPVDD = 3.3V
90
dB
(A-weighted)
HPVDD = 1.8V
90
dB
w
Product Preview Rev 0.4 May 2003
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