MAX9724A 查看數據表（PDF） - Maxim Integrated
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MAX9724A
Maxim Integrated
MAX9724A Datasheet PDF : 19 Pages
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60mW, DirectDrive, Stereo Headphone Amplifier
with Low RF Susceptibility and Shutdown
Typical Operating Characteristics (continued)
(VDD = 5V, PGND = SGND = 0V, SHDN = VDD, C1 = C2 = 1µF, RL = ∞, gain = -1.5V/V (RIN = 20kΩ, RF = 30kΩ for the MAX9724A),
THD+N measurement bandwidth = 22Hz to 22kHz, both outputs driven in phase, TA = +25°C, unless otherwise noted.)
CROSSTALK vs. FREQUENCY
0
POUT = 15mW
RL = 16Ω
-20
OUTPUT POWER vs. LOAD RESISTANCE AND
CHARGE-PUMP CAPACITOR SIZE (TQFN)
80
C1 = C2 = 2.2μF
70
C1 = C2 = 1μF
-40
60
-60
RIGHT TO LEFT
-80
-100
LEFT TO RIGHT
-120
10
100
1k
10k
100k
FREQUENCY (Hz)
OUTPUT POWER vs. LOAD RESISTANCE AND
CHARGE-PUMP CAPACITOR SIZE (UCSP)
80
C1 = C2 = 2.2μF
70
60
50
C1 = C2 = 1μF
40
C1 = C2 = 0.47μF
30
20
10
0
0
VDD = 5V
fIN = 1kHz
THD+N = 1%
50
100
150
LOAD RESISTANCE (Ω)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
3.5
3.4
3.3
3.2
3.1
3.0
2.9
2.8
2.5
NO LOAD
INPUTS
GROUND
3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
50
40
30
20
0
C1 = C2 = 0.47μF
VDD = 5V
fIN = 1kHz
THD+N = 1%
50
100
150
LOAD RESISTANCE (Ω)
OUTPUT SPECTRUM vs. FREQUENCY
-40
-50
RL = 32Ω
VDD = 3V
-60
fIN = 1kHz
-70
VOUT = -60dBV
-80
-90
-100
-110
-120
-130
-140
0
5
10
15
20
FREQUENCY (kHz)
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE (TQFN)
140
NO LOAD INPUTS GND
120
100
80
60
40
20
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________ 7
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