Maxim Integrated MAX9778 - Manual (Page 7)

MAX9777/MAX9778
Stereo 3W Audio Power Amplifiers with
Headphone Drive and Input Mux
_______________________________________________________________________________________ 7
CROSSTALK vs. FREQUENCY
(SPEAKER MODE)
MAX9777/78 toc19
FREQUENCY (Hz)
CROSSTALK (dB)
10k 1k 100
-110
-100
-90
-80
-70
-60
-50
-40
-120
10 100k
V IN = 200mV P-P
R L = 8 Ω
RIGHT TO LEFT
LEFT TO RIGHT
ENTERING SHUTDOWN (SPEAKER MODE)
MAX9777/78 toc20
400ms/div
V DD
2V/div
OUT_+ AND OUT_-
1V/div
OUT_+ - OUT_-
200mV/div
EXITING SHUTDOWN (SPEAKER MODE)
MAX9777/78 toc21
100ms/div
OUT_+ AND OUT_-
1V/div
OUT_+ - OUT_-
500mV/div
SHDN
2V/div
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (HEADPHONE MODE)
MAX9777/78 toc22
FREQUENCY (Hz)
THD+N (%)
10k 1k 100
0.001
0.01
0.1
1
0.0001
10 100k
R
L
= 16 Ω
A V = 1V/V
P OUT = 50mW
P OUT = 25mW
P OUT = 100mW
P
OUT
= 150mW
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (HEADPHONE MODE)
MAX9777/78 toc23
FREQUENCY (Hz)
THD+N (%)
10k 1k 100
0.001
0.01
0.1
1
0.0001
10 100k
R L = 16 Ω
A V = 2V/V
P OUT = 50mW
P
OUT
= 25mW
P OUT = 100mW P OUT = 150mW
Typical Operating Characteristics (continued)
(V DD = PV DD = 5V, GND = PGND = 0V, V SHDN = 5V, C BIAS = 1µF, T A = +25°C, unless otherwise noted.)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (SPEAKER MODE)
MAX9777/78 toc18
FREQUENCY (Hz)
PSRR (dB)
10k 1k 100
90
80
70
60
50
40
100
10 100k
V RIPPLE = 200mV P-P