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ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsLinear IC - Audio amplifier Headphones (2-channel, stereo) Class AB TSSOP 16
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MAX9722A/MAX9722B
5V, Differential Input, DirectDrive, 130mW
Stereo Headphone Amplifiers with Shutdown
6 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(MAX9722A, PV
DD
= SV
DD
= +5V, PGND = SGND = 0V, SHDN = SV
DD
, C1 = C2 = 1µF, R
L
= ∞, gain = -1V/V, single-ended input,
THD+N measurement bandwidth = 22Hz to 22kHz, T
A
= +25°C, unless otherwise noted.)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX9722 toc22
FREQUENCY (Hz)
PSRR (dB)
10k1k100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
10 100k
V
DD
= 5V
A
V
= -1V/V
R
L
= 32Ω
RIGHT
LEFT
CROSSTALK vs. FREQUENCY
MAX9722 toc23
FREQUENCY (Hz)
CROSSTALK (dB)
10k1k100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
10 100k
V
DD
= 3V
A
V
= -1V/V
V
IN
= 200mV
P-P
R
L
= 32Ω
RIGHT TO LEFT
LEFT TO RIGHT
CROSSTALK vs. FREQUENCY
MAX9722 toc24
FREQUENCY (Hz)
CROSSTALK (dB)
10k1k100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
10 100k
V
DD
= 5V
A
V
= -1V/V
V
IN
= 200mV
P-P
R
L
= 32Ω
RIGHT TO LEFT
LEFT TO RIGHT
GAIN FLATNESS vs. FREQUENCY
MAX9722 toc25
FREQUENCY (Hz)
GAIN (dB)
10k100 1k
-3
-2
-1
0
1
2
3
4
-4
10 100k
V
DD
= 5V
A
V
= -1V/V
R
L
= 32Ω
CHARGE-PUMP OUTPUT RESISTANCE
vs. SUPPLY VOLTAGE
MAX9722 toc26
SUPPLY VOLTAGE (V)
OUTPUT RESISTANCE (Ω)
5.24.84.0 4.43.2 3.62.8
1
2
3
4
5
6
7
8
9
10
0
2.4 5.6
V
IN
= GND
I
PVSS
= 10mA
C1 = C2 = 2.2μF
NO LOAD
OUTPUT POWER vs. LOAD RESISTANCE
MAX9722 toc27
LOAD RESISTANCE (Ω)
OUTPUT POWER (mW)
403020
10
20
30
40
50
60
0
10 50
V
DD
= 3V
f = 1kHz
A
V
= -1V/V
THD+N = 1%
C
1
= C
2
= 1μF
C
1
= C
2
= 0.68μF
C
1
= C
2
= 0.47μF
C
1
= C
2
= 2.2μF
OUTPUT SPECTRUM vs. FREQUENCY
MAX9722 toc28
FREQUENCY (kHz)
OUTPUT (dBc)
15105
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10
-100
020
V
DD
= 5V
R
L
= 32Ω
V
OUT
= 1mV
RMS
f = 1kHz
A
V
= -1V/V
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX9722 toc29
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
54123
1
2
3
4
5
6
7
8
0
0
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX9722 toc30
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (nA)
4321
2
4
6
8
10
12
14
16
18
20
0
05