Maxim MAX9777 Manual page 8

Stereo 3W Audio Power Amplifiers with
Headphone Drive and Input Mux
(V = PV = 5V, GND = PGND = 0V, V
DD DD
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (HEADPHONE MODE)
1
0.1
P = 25mW
OUT
P = 50mW
OUT
0.01
0.001
P = 100mW
OUT
P = 150mW
OUT
0.0001
10 100 1k
FREQUENCY (Hz)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (HEADPHONE MODE)
100
A = 2V/V
V
R = 16Ω
L
10
1
0.1
f = 20Hz
0.01
0.001
0.0001
0 50 100 150
OUTPUT POWER (mW)
OUTPUT POWER vs. AMBIENT TEMPERATURE
(HEADPHONE MODE)
300
THD+N = 10%
250
200
THD+N = 1%
150
100
50
f = 1kHz
R = 16Ω
L
0
-40 -15 10 35
AMBIENT TEMPERATURE (°C)
8 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Typical Operating Characteristics (continued)
SHDN = 5V, C
BIAS
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (HEADPHONE MODE)
1
R = 32Ω
L
A = 1V/V
V
0.1
P
OUT
0.01
0.001
P
OUT
0.0001
10k 100k
10
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (HEADPHONE MODE)
100
A = 1V/V
V
R = 32Ω
L
10
1
f = 10kHz
0.1
0.01
f = 1kHz
0.001
0.0001
200 250 300 0
OUTPUT POWER vs. AMBIENT TEMPERATURE
150
125 THD+N = 10%
100
THD+N = 1%
75
50
25
f = 1kHz
R = 32Ω
L
0
-40
60 85
= 1µF, T = +25°C, unless otherwise noted.)
A
R = 32Ω
L
A = 2V/V
V
= 25mW
P = 50mW
OUT
P = 100mW
OUT
= 150mW
100 1k 10k 100k
FREQUENCY (Hz)
f = 10kHz
f = 20Hz
f = 1kHz
25 50 75 100 125
OUTPUT POWER (mW)
(HEADPHONE MODE)
-15 10 35 60 85
AMBIENT TEMPERATURE (°C)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (HEADPHONE MODE)
100
A = 1V/V
V
R = 16Ω
L
10
1
f = 20Hz
0.1
0.01
0.001
f = 1kHz
0.0001
0 50 100 150 200
OUTPUT POWER (mW)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (HEADPHONE MODE)
100
A = 2V/V
V
R = 32Ω
L
10
f = 1kHz
1
f = 20Hz
0.1
0.01
0.001
0.0001
0 25 50 75
OUTPUT POWER (mW)
OUTPUT POWER vs. LOAD RESISTANCE
(HEADPHONE MODE)
600
500
THD+N = 10%
400
300
200
THD+N = 1%
100
0
1 10 100
LOAD RESISTANCE (Ω)
f = 10kHz
250 300
f = 10kHz
100 125
f = 1kHz
1k 10k