Typical Operating Characteristics (continued)
(Measurement BW = 22Hz to 22kHz, TA = +25°C, unless otherwise noted.)
MAX9750/MAX9751/MAX9755
2.6W Stereo Audio Power Amplifiers and
DirectDrive Headphone Amplifiers
8
_______________________________________________________________________________________
10
1
0.1
0.01
0.001
0.0001
10
1k
10k
100
100k
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (HEADPHONE MODE)
MAX9750/51
toc19
FREQUENCY (Hz)
THD+N
(%)
VDD = 5V
RL = 32
Ω
AV = 3dB
OUTPUT POWER = 45mW
OUTPUT POWER = 10mW
10
1
0.1
0.01
0.001
0.0001
10
1k
10k
100
100k
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (HEADPHONE MODE)
MAX9750/51
toc20
FREQUENCY (Hz)
THD+N
(%)
VDD = 3.3V
RL = 16
Ω
AV = 3dB
OUTPUT POWER = 30mW
OUTPUT POWER = 10mW
10
1
0.1
0.01
0.001
0.0001
10
1k
10k
100
100k
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (HEADPHONE MODE)
MAX9750/51
toc21
FREQUENCY (Hz)
THD+N
(%)
VDD = 3.3V
RL = 32
Ω
AV = 3dB
OUTPUT POWER = 45mW
OUTPUT POWER = 10mW
1000
100
10
1
0.1
0.01
0.001
075
100
125
50
25
150
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (HEADPHONE MODE)
MAX9750/51
toc22
OUTPUT POWER (mW)
THD+N
(%)
VDD = 5V
RL = 16
Ω
AV = 3dB
fIN = 10kHz
fIN = 1kHz
fIN = 20Hz
1000
100
10
1
0.1
0.01
0.001
060
80
40
20
100
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (HEADPHONE MODE)
MAX9750/51
toc23
OUTPUT POWER (mW)
THD+N
(%)
VDD = 5V
RL = 32
Ω
AV = 3dB
fIN = 10kHz
fIN = 1kHz
fIN = 20Hz
1000
100
10
1
0.1
0.01
0.001
030
40
50
20
10
60
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (HEADPHONE MODE)
MAX9750/51
toc24
OUTPUT POWER (mW)
THD+N
(%)
VDD = 3.3V
RL = 16
Ω
AV = 3dB
fIN = 10kHz
fIN = 1kHz
fIN = 20Hz
TURN-OFF RESPONSE
(SPEAKER MODE)
MAX9750/51 toc17
20ms/div
SHDN
5V/div
2V/div
20mV/div
OUT_+
AND
OUT_-
OUT_+
- OUT_-
RL = 8
Ω
10
1
0.1
0.01
0.001
0.0001
10
1k
10k
100
100k
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (HEADPHONE MODE)
MAX9750/51
toc18
FREQUENCY (Hz)
THD+N
(%)
VDD = 5V
RL = 16
Ω
AV = 3dB
OUTPUT POWER = 90mW
OUTPUT POWER = 30mW