MAX9720 Ver la hoja de datos (PDF) - Maxim Integrated
Número de pieza
componentes Descripción
Fabricante
MAX9720 Datasheet PDF : 21 Pages
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50mW, DirectDrive, Stereo Headphone
Amplifier with SmartSense and Shutdown
Typical Operating Characteristics (continued)
(VDD = 3V, THD+N bandwidth = 22Hz to 22kHz, MODE1 = MODE2 = VDD.)
CROSSTALK vs. FREQUENCY
0
-10
-20
VDD = 1.8V
RL = 32Ω
VIN = 200mVP-P
-30
-40
-50
-60
RIGHT-TO-LEFT
-70
CHANNEL
-80
-90
-100
LEFT-TO-RIGHT
CHANNEL
-110
-120
10
100
1k
10k
100k
FREQUENCY (Hz)
OUTPUT POWER vs. LOAD RESISTANCE
AND CHARGE-PUMP CAPACITOR SIZE
60
2.2µF
50
1µF
40
GAIN FLATNESS vs. FREQUENCY
5
4 AV = -1V/V
3
2
1
0
-1
-2
-3
-4
-5
0.01 0.1
1 10 100 1k 10k
FREQUENCY (Hz)
OUTPUT SPECTRUM vs. FREQUENCY
0
VIN = 1VP-P
-20
RL = 32Ω
fIN = 1kHz
-40
CHARGE-PUMP OUTPUT IMPEDANCE
vs. SUPPLY VOLTAGE
14
12
10
8
6
4
2
0
1.8
ILOAD = 10mA
2.1 2.4 2.7 3.0 3.3 3.6
SUPPLY VOLTAGE (V)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
6
5
STEREO MODE
4
30
0.47µF
20
fIN = 1kHz
THD+N = 1%
10 OUTPUTS
IN PHASE
0
10
20
30
40
LOAD RESISTANCE (Ω)
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
9
8
7
6
5
4
3
2
1
0
1.8 2.1 2.4 2.7 3.0 3.3
SUPPLY VOLTAGE (V)
-60
-80
-100
-120
50
100
MODE1 AND
MODE2
OUT_
1k
10k
100k
FREQUENCY (Hz)
EXITING SHUTDOWN
MAX9720 toc53
3V
0V
500mV/div
3
MONO MODE
2
1
0
1.8 2.1 2.4 2.7 3.0 3.3 3.6
SUPPLY VOLTAGE (V)
POWER-UP/DOWN WAVEFORM
MAX9720 toc54
3V
VDD
0V
OUT_
100dB
10mV/div
OUT_FFT
20dB/div
3.6
400µs/div
fIN = 1kHz
RL = 32Ω
VIN = GND
RL = 32Ω
200ms/div
FFT: 25Hz/div
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