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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 (%)
10k1k100
0.01
0.1
1
0.001
10 100k
R
L
= 3
Ω
A
V
= 2V/V
P
OUT
= 2.5WP
OUT
= 2W
P
OUT
= 500mW
P
OUT
= 1W
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (SPEAKER MODE)
MAX9777/78 toc02
FREQUENCY (Hz)
THD+N (%)
10k1k100
0.01
0.1
1
0.001
10 100k
R
L
= 3Ω
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 (%)
10k1k100
0.01
0.1
1
0.001
10 100k
R
L
= 4Ω
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 (%)
10k1k100
0.01
0.1
1
0.001
10 100k
R
L
= 4Ω
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 (%)
10k1k100
0.01
0.1
1
0.001
10 100k
R
L
= 8Ω
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 (%)
10k1k100
0.01
0.1
1
0.001
10 100k
P
OUT
= 250mW
P
OUT
= 1.2W
P
OUT
= 1W
P
OUT
= 500mW
R
L
= 8Ω
A
V
= 4V/V
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (SPEAKER MODE)
MAX9777/78 toc07
OUTPUT POWER (W)
THD+N (%)
321
0.01
10
1
0.1
100
0.001
04
A
V
= 2V/V
R
L
= 3Ω
f = 1kHz
f = 20Hz
f = 10kHz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (SPEAKER MODE)
MAX9777/78 toc08
OUTPUT POWER (W)
THD+N (%)
321
0.01
10
1
0.1
100
0.001
04
A
V
= 4V/V
R
L
= 3Ω
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 3.02.01.51.00.5
0.01
10
1
0.1
100
0.001
0 3.5
A
V
= 2V/V
R
L
= 4Ω
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.)