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| YDA137 Datasheet, PDF (15/20 Pages) YAMAHA CORPORATION – D- 2 STEREO 5W DIGITAL AUDIO POWER AMPLIFIER | |||
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YDA137
â Typical analog characteristics
âAnalog Characteristics Note 8) (VSS=0V, VDD=5V, Ta=25â, Frequency:1kHz, RI=33kΩ, RFB=39kΩ, unless
otherwise specified)
Digital Amplifier Section
Item
Condition
Symbol Min.
Typ.
Max. Unit
Maximum Output
(THD+N=10%)
RL=2Ω
RL=3Ω
RL=4Ω
5.0
W
PD
3.7
W
3.0
W
Voltage Gain
AV
9.5
dB
Total Harmonic Distortion Rate
(BW: 20kHz)
RL=2Ω, PO=2.5W
0.03
THD+N
%
Signal /Noise Ratio
(BW:20kHz A-Filter)
RL=3Ω, PO=1.5W
RL=2Ω, PO=5W,
1Vrms input sensitivity Note 9)
RL=2Ω, PO=5W,
150mVrms input sensitivity Note 9)
SNR
0.02
%
105.0
dB
98.0
dB
Channel Separation Ratio
CS
80
dB
Maximum Efficiency
RL=2Ω, PO=5W
RL=3Ω, PO=3W
75
%
η
80
%
Output Offset Voltage
Vo
±10
mV
Note 8) All values of analog characteristics are obtained on the Yamahaâs evaluation environment.
Depending upon coil, capacitor, and pattern layout to use, characteristics may be changed.
Note 9) 1Vrms input sensitivity means a setting from which maximum output is obtained at 1Vrms input, and here, RI=33kΩ and RFB=39kΩ.
Likewise, 150mVrms input sensitivity means a setting from which maximum output is obtained at 150mVrms input, and here, RI=4.7kΩ
and RFB=39kΩ.
Headphone Amplifier Section
Item
Condition
Symbol Min.
Typ.
Max. Unit
Maximum Output
(THD+N=1.0%)
RL=16Ω
Pho
20.0
mW
Total Harmonic Distortion Rate
(BW:20kHz )
RL=16Ω, PO=10mW
THD+N
0.25
%
Signal /Noise Ratio
(BW: 20kHz A-Filter )
RL=16Ω, PO=20mW,
1Vrms input sensitivity Note 9)
RL=16Ω, PO=20mW,
VN
150mVrms input sensitivity
Note 9)
97.0
dB
90.0
dB
Channel Separation Ratio
RL=16Ω
CS
80
dB
15
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