MAX9779 查看數據表（PDF） - Maxim Integrated
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MAX9779 Datasheet PDF : 19 Pages
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2.6W Stereo Audio Power Amplifier and
DirectDrive Headphone Amplifier
Typical Operating Characteristics (continued)
(Measurement BW = 22Hz to 22kHz, TA = +25°C, unless otherwise noted.)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (HEADPHONE MODE)
1000
VDD = 5V
100
RL = 32Ω
AV = 3dB
10
1
fIN = 1kHz
0.1
fIN = 20Hz
fIN = 10kHz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (HEADPHONE MODE)
1000
VDD = 3.3V
100
RL = 16Ω
AV = 3dB
10
fIN = 1kHz
1
fIN = 20Hz
0.1
fIN = 10kHz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (HEADPHONE MODE)
1000
VDD = 3.3V
RL = 32Ω
100 AV = 3dB
10
fIN = 1kHz
1
fIN = 20Hz
0.1
fIN = 10kHz
0.01
0.01
0.01
0.001
0
0.001
20
40
60
80 100
0 10 20 30 40 50 60
OUTPUT POWER (mW)
OUTPUT POWER (mW)
0.001
0
10 20 30 40 50 60 70 80 90
OUTPUT POWER (mW)
OUTPUT POWER vs. LOAD RESISTANCE
(HEADPHONE MODE)
180
160
THD+N = 10%
140
120
100
80
60
40
THD+N = 1%
20
0
10
100
1000
LOAD RESISTANCE (Ω)
POWER DISSIPATION vs. OUTPUT POWER
(HEADPHONE MODE)
250
225
200
RL = 16Ω
175
150
125
100
RL = 32Ω
75
50
25
0
0
VDD = 5V
f = 1kHz
POUT = POUTL + POUTR
25 50 75 100 125 150 175 200 225 250
OUTPUT POWER (mW)
OUTPUT POWER vs. SUPPLY VOLTAGE
(HEADPHONE MODE)
125
RL = 16Ω
100
75
RL = 32Ω
50
25
f = 1kHz
0
3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (HEADPHONE MODE)
0
-10
VRIPPLE = 200mVP-P
OUTPUT REFERRED
-20
-30
-40
-50
-60
-70
-80
-90
-100
10
100
1k
10k
100k
FREQUENCY (Hz)
CROSSTALK vs. FREQUENCY
(HEADPHONE MODE)
0
VDD = 5V
VRIPPLE = 200mVP-P
-20 RL = 32Ω
-40
-60
-80
RIGHT TO LEFT
-100
LEFT TO RIGHT
-120
10
100
1k
10k
100k
FREQUENCY (Hz)
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