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)
CROSSTALK
vs. FREQUENCY
0
VIN = 1VP-P
-20 RL = 32Ω
A = 0dB
-40
RIGHT TO LEFT
-60
A = 0dB
-80
CROSSTALK
vs. FREQUENCY
0
VIN = 1VP-P
-20 RL = 32Ω
A = -10dB
-40
RIGHT TO LEFT
-60
A = -10dB
-80
-100
-120
10
20
15
10
5
LEFT TO RIGHT
A = 0dB
100
1k
10k
100k
FREQUENCY (Hz)
BASS BOOST FREQUENCY
RESPONSE
R2 = 36kΩ
C3 = 0.068µF
R2 = 22kΩ
C3 = 0.1µF
R2 = 10kΩ
C3 = 0.22µF
NO LOAD
R1 = 47kΩ
0
BassMax DISABLED
-5
-10
10
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
0
100
1k
10k
100k
FREQUENCY (Hz)
OUTPUT SPECTRUM
vs. FREQUENCY
RL = 32Ω
VDD = 3V
fIN = 1kHz
5
10
15
20
FREQUENCY (kHz)
-100
-120
10
1
LEFT TO RIGHT
A = -10dB
100
1k
10k
100k
FREQUENCY (Hz)
GAIN FLATNESS
vs. FREQUENCY
0
-1
-2
-3
-4
-5
-6
-7
10
100
1k
10k
100k
FREQUENCY (Hz)
CHARGE-PUMP OUTPUT VOLTAGE
vs. OUTPUT CURRENT
0
NO HEADPHONE LOAD
-0.5 CHARGE-PUMP LOAD
CONNECTED
-1.0 BETWEEN PVSS AND PGND
-1.5
-2.0
-2.5
-3.0
-3.5
0
25 50 75 100 125 150 175 200
OUTPUT CURRENT (mA)
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