MAX9723 查看數據表（PDF） - Maxim Integrated
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MAX9723 Datasheet PDF : 26 Pages
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MAX9723
Stereo DirectDrive Headphone Amplifier
with BassMax, Volume Control, and I2C
Typical Operating Characteristics (continued)
(VDD = SHDN = 3V, PGND = SGND = 0V, C1 = C2 = 1μF, BB_ = 0V, gain = 0dB, maximum volume, BassMax disabled. Load connected
between OUT_ and SGND where specified. Outputs in phase, both channels loaded. TA = +25°C, unless otherwise noted.) (See Func-
tional Diagram/Typical Operating Circuit)
OUTPUT POWER vs. CHARGE-PUMP
CAPACITANCE AND LOAD RESISTANCE
75
70 C1 = C2 = 2.2µF
65
C1 = C2 = 1µF
60
55
C1 = C2 = 0.68µF
50
45
40
35
10
VDD = 3V
fIN = 1kHz
THD+N = 1%
20
30
40
50
LOAD RESISTANCE (Ω)
POWER-UP/POWER-DOWN
WAVEFORM
MAX9723 toc23
VDD
2V/div
20ms/div
VOUT
10mV/div
EXITING SHUTDOWN
MAX9723 toc24
ENTERING SHUTDOWN
MAX9723 toc25
VSHDN
2V/div
VSHDN
2V/div
VOUT_
200mV/div
40µs/div
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
4.5
4.0
3.5
3.0
2.5
NO LOAD
INPUTS GROUNDED
2.0
1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6
SUPPLY VOLTAGE (V)
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VOUT_
200mV/div
20µs/div
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
8
7
6
5
4
3
2
1 NO LOAD
INPUTS GROUNDED
0
1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6
SUPPLY VOLTAGE (V)
Maxim Integrated │ 8
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