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MAX9750/MAX9751/MAX9755
2.6W Stereo Audio Power Amplifiers and
DirectDrive Headphone Amplifiers
6 _______________________________________________________________________________________
Typical Operating Characteristics
(Measurement BW = 22Hz to 22kHz, T
A
= +25°C, unless otherwise noted.)
10
1
0.1
0.01
0.001
0.0001
10 1k 10k100 100k
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (SPEAKER MODE)
MAX9750/51 toc01
FREQUENCY (Hz)
THD+N (%)
V
CC
= 5V
R
L
= 3Ω
A
V
= 10.5dB
OUTPUT POWER = 1.5W
OUTPUT POWER = 500mW
10
1
0.1
0.01
0.001
0.0001
10 1k 10k100 100k
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (SPEAKER MODE)
MAX9750/51 toc02
FREQUENCY (Hz)
THD+N (%)
V
CC
= 5V
R
L
= 4Ω
A
V
= 10.5dB
OUTPUT POWER = 1.25W
OUTPUT POWER = 500mW
10
1
0.1
0.01
0.001
0.0001
10 1k 10k100 100k
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (SPEAKER MODE)
MAX9750/51 toc03
FREQUENCY (Hz)
THD+N (%)
V
CC
= 5V
R
L
= 8Ω
A
V
= 10.5dB
OUTPUT POWER = 100mW
OUTPUT POWER = 600mW
100
00.51.01.5 2.0 2.5 3.0
10
1
0.1
0.01
0.001
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (SPEAKER MODE)
MAX9750/51 toc04
OUTPUT POWER (W)
THD+N (%)
V
CC
= 5V
R
L
= 3Ω
A
V
= 10.5dB
MAX9750C
f
IN
= 10kHz
f
IN
= 1kHz
f
IN
= 20Hz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (SPEAKER MODE)
MAX9750/51 toc05
OUTPUT POWER (W)
THD+N (%)
3.53.02.52.01.51.00.5
0.01
0.1
1
10
100
0.001
0
V
DD
= 5V
A
V
= 13.5dB
R
L
= 3Ω
f = 1kHz
f = 10kHz
f = 20Hz
100
0
0.5
1.0 1.5
2.0
10
1
0.1
0.01
0.001
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (SPEAKER MODE)
MAX9750/51 toc06
OUTPUT POWER (W)
THD+N (%)
f
IN
= 1kHz
f
IN
= 20Hz
V
CC
= 5V
R
L
= 4Ω
A
V
= 10.5dB
MAX9750C
f
IN
= 10kHz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (SPEAKER MODE)
MAX9750/51 toc07
OUTPUT POWER (W)
THD+N (%)
2.52.01.51.00.5
0.01
0.1
1
10
100
0.001
0 3.0
V
DD
= 5V
A
V
= 13.5dB
R
L
= 4Ω
f = 1kHz
f = 10kHz
f = 20Hz
100
0
0.2 0.4 0.6
0.8 1.0
1.2
10
1
0.1
0.01
0.001
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (SPEAKER MODE)
MAX9750/51 toc08
OUTPUT POWER (W)
THD+N (%)
f
IN
= 20Hz
f
IN
= 1kHz
f
IN
= 10kHz
V
CC
= 5V
R
L
= 8Ω
A
V
= 10.5dB
MAX9750C
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (SPEAKER MODE)
MAX9750/51 toc09
OUTPUT POWER (W)
THD+N (%)
1.51.00.5
0.01
0.1
1
10
100
0.001
0
V
DD
= 5V
A
V
= 13.5dB
R
L
= 8Ω
f = 1kHz
f = 10kHz
f = 20Hz