2.6W Stereo Audio Power Amplifiers and
DirectDrive Headphone Amplifiers
Typical Operating Characteristics (continued)
(Measurement BW = 22Hz to 22kHz, T = +25°C, unless otherwise noted.)
A
CROSSTALK vs. FREQUENCY
(HEADPHONE MODE)
OUTPUT POWER vs. CHARGE-PUMP
CAPACITANCE AND LOAD RESISTANCE
HEADPHONE OUTPUT SPECTRUM
0
-20
0
-20
200
180
160
140
120
100
80
V = 5V
DD
V
V
= 5V
V
= 5V
CC
DD
f = 1kHz
= -60dB
= 200mV
f = 1kHz
THD+N = 1%
RIPPLE
P-P
V
R = 32Ω
OUT
L
R = 32Ω
L
-40
-40
-60
C1 = C2 = 2.2µF
-60
-80
-80
60
-100
-120
-140
RIGHT TO LEFT
C1 = C2 = 1µF
40
-100
-120
20
LEFT TO RIGHT
0
0
5
10
15
20
10
100
1k
10k
100k
10
20
30
40
50
FREQUENCY (Hz)
FREQUENCY (Hz)
LOAD RESISTANCE (Ω)
TURN-OFF RESPONSE
(HEADPHONE MODE)
TURN-ON RESPONSE
(HEADPHONE MODE)
MAX9750/51 toc29
MAX9750/51 toc28
5V/div
5V/div
SHDN
SHDN
20mV/div
20mV/div
HPOUT_
HPOUT_
R
= 32Ω
R
= 32Ω
L
L
10ms/div
10ms/div
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
18
0.35
16
14
12
10
HPS = GND
0.30
0.25
0.20
0.15
0.10
0.05
0
HPS = V
DD
8
6
4
2
0
4.50
4.75
5.00
5.25
5.50
4.50
4.75
5.00
5.25
5.50
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________
9
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
