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
_______________________________________________________________________________________
7
OUTPUT POWER
vs. LOAD RESISTANCE (SPEAKER MODE)
MAX9750/51
toc10
LOAD RESISTANCE (
Ω)
OUTPUT
POWER
(W)
10
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0
1
100
THD+N = 10%
THD+N = 1%
OUTPUT POWER
vs. LOAD RESISTANCE (SPEAKER MODE)
MAX9750/51
toc11
LOAD RESISTANCE (
Ω)
OUTPUT
POWER
(W)
3.0
0
0.5
1.0
1.5
2.0
2.5
1
10
100
THD+N = 10%
THD+N = 1%
VCC = 5V
f = 1kHz
AV = 10.5dB
MAX9750C
POWER DISSIPATION vs. OUTPUT POWER
(SPEAKER MODE)
MAX9750/51
toc12
OUTPUT POWER (W)
POWER
DISSIPATION
(W)
3
2
1
2
3
4
5
0
04
RL = 4
Ω
RL = 8
Ω
VDD = 5V
f = 1kHz
POUT = POUTL + POUTR
POWER DISSIPATION vs. OUTPUT POWER
(SPEAKER MODE)
MAX9750/51
toc13
OUTPUT POWER (W)
POWER
DISSIPATION
(W)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
1
2
3
4
5
0
4.0
RL = 4
Ω
RL = 8
Ω
VDD = 5V
f = 1kHz
POUT = POUTL + POUTR
MAX9750C
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (SPEAKER MODE)
MAX9750/51
toc14
FREQUENCY (Hz)
PSRR
(dB)
10k
1k
100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
10
100k
VRIPPLE = 200mVP-P
AV = 10.5dB
OUTPUT REFERRED
0
-120
10
1k
10k
100
100k
CROSSTALK vs. FREQUENCY
(SPEAKER MODE)
MAX9750/51
toc15
FREQUENCY (Hz)
CROSSTALK
(dB)
-100
-110
-80
-90
-60
-70
-40
-50
-20
-10
-30
VCC = 5V
VRIPPLE = 200mVP-P
RL = 4
Ω
LEFT TO RIGHT
RIGHT TO LEFT
TURN-ON RESPONSE
(SPEAKER MODE)
MAX9750/51 toc16
20ms/div
SHDN
5V/div
2V/div
100mV/div
OUT_+
AND
OUT_-
OUT_+
- OUT_-
RL = 8
Ω