5V, Differential Input, DirectDrive, 130mW
Stereo Headphone Amplifiers with Shutdown
Typical Operating Characteristics (continued)
(MAX9722A, PV
= SV
= +5V, PGND = SGND = 0V, SHDN = SV , C1 = C2 = 1µF, R = ∞, gain = -1V/V, single-ended input,
DD DD L
DD
THD+N measurement bandwidth = 22Hz to 22kHz, T = +25°C, unless otherwise noted.)
A
POWER-SUPPLY REJECTION RATIO
CROSSTALK vs. FREQUENCY
CROSSTALK vs. FREQUENCY
vs. FREQUENCY
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
V
A
V
= 3V
= -1V/V
V
A
V
= 5V
DD
= -1V/V
DD
V
IN
L
V
A
= 5V
= -1V/V
DD
V
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
V
IN
L
= 200mV
= 200mV
P-P
P-P
R = 32Ω
L
R = 32Ω
R = 32Ω
RIGHT TO LEFT
RIGHT TO LEFT
RIGHT
LEFT TO RIGHT
LEFT TO RIGHT
LEFT
10
100
1k
FREQUENCY (Hz)
10k
100k
10
100
1k
FREQUENCY (Hz)
10k
100k
10
10
0
100
1k
10k
100k
FREQUENCY (Hz)
CHARGE-PUMP OUTPUT RESISTANCE
vs. SUPPLY VOLTAGE
OUTPUT POWER vs. LOAD RESISTANCE
GAIN FLATNESS vs. FREQUENCY
4
3
60
50
40
30
20
10
0
10
9
8
7
6
5
4
3
2
1
0
V
A
= 5V
V
I
= GND
DD
IN
C = C = 2.2μF
= -1V/V
R = 32Ω
1
2
= 10mA
V
L
PVSS
C1 = C2 = 2.2μF
NO LOAD
2
1
0
-1
-2
-3
-4
C = C = 1μF
1 2
C = C = 0.68μF
1
2
V
= 3V
C = C = 0.47μF
DD
1
2
f = 1kHz
= -1V/V
A
V
THD+N = 1%
100
1k
10k
100k
10
20
30
40 50
2.4 2.8 3.2 3.6 4.0 4.4 4.8 5.2 5.6
SUPPLY VOLTAGE (V)
FREQUENCY (Hz)
LOAD RESISTANCE (Ω)
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
OUTPUT SPECTRUM vs. FREQUENCY
SUPPLY CURRENT vs. SUPPLY VOLTAGE
20
18
16
14
12
10
8
10
0
8
7
6
5
4
3
2
1
0
V
= 5V
DD
R = 32Ω
L
V
= 1mV
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
OUT
RMS
f = 1kHz
= -1V/V
A
V
6
4
2
0
0
1
2
3
4
5
5
10
FREQUENCY (kHz)
15
20
0
1
2
3
4
5
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
6
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
