2.6W Stereo Audio Power Amplifiers and
DirectDrive Headphone Amplifiers
Typical Operating Characteristics
(Measurement BW = 22Hz to 22kHz, T = +25°C, unless otherwise noted.)
A
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (SPEAKER MODE)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (SPEAKER MODE)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (SPEAKER MODE)
10
1
10
1
10
1
V
= 5V
V
= 5V
V
= 5V
CC
CC
CC
R = 3Ω
R = 4Ω
R = 8Ω
L
L
L
A
V
= 10.5dB
A
= 10.5dB
A = 10.5dB
V
V
OUTPUT POWER = 1.5W
OUTPUT POWER = 1.25W
OUTPUT POWER = 100mW
0.1
0.01
0.1
0.01
0.1
0.01
OUTPUT POWER = 500mW
OUTPUT POWER = 500mW
OUTPUT POWER = 600mW
0.001
0.001
0.001
0.0001
0.0001
0.0001
10
100
1k
10k
100k
10
100
1k
10k
100k
10
100
1k
10k
100k
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (SPEAKER MODE)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (SPEAKER MODE)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (SPEAKER MODE)
100
10
1
100
10
1
100
10
1
V
= 5V
V
= 5V
CC
L
V
CC
L
V
V
= 5V
CC
L
V
R = 8Ω
A
MAX9750C
R = 4Ω
A
MAX9750C
R = 3Ω
A
MAX9750C
= 10.5dB
= 10.5dB
= 10.5dB
f
= 10kHz
f
= 10kHz
IN
IN
f
= 10kHz
0.1
0.1
0.1
IN
0.01
0.01
0.01
f
= 1kHz
2.0
f
= 1kHz
IN
IN
f
= 20Hz
f
= 1kHz
0.8
f
= 20Hz
IN
IN
IN
f
= 20Hz
IN
0.001
0.001
0.001
0
0.5
1.0
1.5
2.5
3.0
0
2.0
0
1.2
0.5
1.0
OUTPUT POWER (W)
1.5
0.2
0.4
0.6
1.0
OUTPUT POWER (W)
OUTPUT POWER (W)
POWER DISSIPATION vs. OUTPUT POWER
(SPEAKER MODE)
OUTPUT POWER
vs. LOAD RESISTANCE (SPEAKER MODE)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (SPEAKER MODE)
5
4
3
2
1
0
3.0
2.5
2.0
1.5
1.0
0.5
0
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
V
A
= 200mV
P-P
= 10.5dB
V
= 5V
RIPPLE
V
V
= 5V
DD
CC
f = 1kHz
= P
f = 1kHz
= 10.5dB
OUTPUT REFERRED
P
+ P
OUTR
A
OUT
OUTL
V
MAX9750C
MAX9750C
R = 4Ω
L
THD+N = 10%
THD+N = 1%
R = 8Ω
L
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
OUTPUT POWER (W)
1
10
LOAD RESISTANCE (Ω)
100
10
100
1k
FREQUENCY (Hz)
10k
100k
6
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
