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Maxim MAX9777 用户手册

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MAX9777/MAX9778
Stereo 3W Audio Power Amplifiers with
Headphone Drive and Input Mux
_______________________________________________________________________________________
5
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (SPEAKER MODE)
MAX9777/78 toc01
FREQUENCY (Hz)
THD+N (%)
10k
1k
100
0.01
0.1
1
0.001
10
100k
R
L
 = 3
Ω
A
V
 = 2V/V
P
OUT
 = 2.5W
P
OUT
 = 2W
P
OUT
 = 500mW
P
OUT
 = 1W
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (SPEAKER MODE)
MAX9777/78 toc02
FREQUENCY (Hz)
THD+N (%)
10k
1k
100
0.01
0.1
1
0.001
10
100k
R
L
 = 3
Ω
A
V
 = 4V/V
P
OUT
 = 2.5W
P
OUT
 = 2W
P
OUT
 = 500mW
P
OUT
 = 1W
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (SPEAKER MODE)
MAX9777/78 toc03
FREQUENCY (Hz)
THD+N (%)
10k
1k
100
0.01
0.1
1
0.001
10
100k
R
L
 = 4
Ω
A
V
 = 2V/V
P
OUT
 = 2W
P
OUT
 = 1W
P
OUT
 = 500mW
P
OUT
 = 250mW
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (SPEAKER MODE)
MAX9777/78 toc04
FREQUENCY (Hz)
THD+N (%)
10k
1k
100
0.01
0.1
1
0.001
10
100k
R
L
 = 4
Ω
A
V
 = 4V/V
P
OUT
 = 250mW
P
OUT
 = 2W
P
OUT
 = 1W
P
OUT
 = 500mW
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (SPEAKER MODE)
MAX9777/78 toc05
FREQUENCY (Hz)
THD+N (%)
10k
1k
100
0.01
0.1
1
0.001
10
100k
R
L
 = 8
Ω
A
V
 = 2V/V
P
OUT
 = 250mW
P
OUT
 = 1.2W
P
OUT
 = 1W
P
OUT
 = 500mW
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (SPEAKER MODE)
MAX9777/78 toc06
FREQUENCY (Hz)
THD+N (%)
10k
1k
100
0.01
0.1
1
0.001
10
100k
P
OUT
 = 250mW
P
OUT
 = 1.2W
P
OUT
 = 1W
P
OUT
 = 500mW
R
L
 = 8
Ω
A
V
 = 4V/V
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (SPEAKER MODE)
MAX9777/78 toc07
OUTPUT POWER (W)
THD+N (%)
3
2
1
0.01
10
1
0.1
100
0.001
0
4
A
V
 = 2V/V
R
L
 = 3
Ω
f = 1kHz
f = 20Hz
f = 10kHz 
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (SPEAKER MODE)
MAX9777/78 toc08
OUTPUT POWER (W)
THD+N (%)
3
2
1
0.01
10
1
0.1
100
0.001
0
4
A
V
 = 4V/V
R
L
 = 3
Ω
f = 20Hz
f = 1kHz
f = 10kHz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (SPEAKER MODE)
MAX9777/78 toc09
OUTPUT POWER (W)
THD+N (%)
2.5
3.0
2.0
1.5
1.0
0.5
0.01
10
1
0.1
100
0.001
0
3.5
A
V
 = 2V/V
R
L
 = 4
Ω
f = 20Hz
f = 1kHz
f = 10kHz 
Typical Operating Characteristics
(V
DD
= PV
DD
= 5V, GND = PGND = 0V, V
SHDN
= 5V, C
BIAS
= 1µF, T
A 
= +25°C, unless otherwise noted.)