MAX9721 查看數據表（PDF） - Maxim Integrated
零件编号
产品描述 (功能)
生产厂家
MAX9721 Datasheet PDF : 14 Pages
| |||
1V, Fixed-Gain, DirectDrive, Stereo Headphone
Amplifier with Shutdown
Typical Operating Characteristics (continued)
(VDD = 1.5V, PGND = SGND = 0V, VSHDN = 1.5V, VSS = PVSS, C1 = C2 = 1µF, CIN = 1µF, THD+N measurement bandwidth = 22Hz
to 22kHz, TA = +25°C, unless otherwise noted.) (See the Functional Diagram.)
80
70
60
50
40
30
20
10
0
0
POWER DISSIPATION
vs. OUTPUT POWER
RL = 16Ω
RL = 32Ω
VDD = 1.5V
fIN = 1kHz
POUT = POUTL + POUTR
OUTPUTS IN-PHASE
10
20
30
40
50
OUTPUT POWER (mW)
35
30
25
20
15
10
5
0
0
POWER DISSIPATION
vs. OUTPUT POWER
RL = 16Ω
RL = 32Ω
VDD = 1V
fIN = 1kHz
POUT = POUTL + POUTR
OUTPUTS IN-PHASE
5
10
15
20
OUTPUT POWER (mW)
2
1
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
10
GAIN FLATNESS
vs. FREQUENCY
100
1k
10k
100k
FREQUENCY (Hz)
OUTPUT POWER vs. CHARGE-PUMP
CAPACITANCE AND LOAD RESISTANCE
40
35
C1 = C2 = 2.2µF
30
C1 = C2 = 1µF
25
20
15
10
C1 = C2 = 0.68µF
5 C1 = C2 = 0.47µF
0
10
20
30
VDD = 1.5V
fIN = 1kHz
THD+N = 1%
40
50
LOAD RESISTANCE (Ω)
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
1.4
0
-20
-40
-60
-80
-100
-120
-140
0
OUTPUT SPECTRUM
vs. FREQUENCY
fIN = 1kHz
RL = 32Ω
POUT = 12mW
VDD = 1.5V
5
10
15
20
FREQUENCY (kHz)
EXITING SHUTDOWN
MAX9721toc23
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
5.0
NO LOAD
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0.9 1.0 1.1 1.2 1.3 1.4 1.5
SUPPLY VOLTAGE (V)
POWER-UP/-DOWN WAVEFORM
MAX9721toc24
1.2
OUT_
1.0
1V/div
VDD
1V/div
0.8
SHDN
0.6
500mV/div
0.4
OUT_
10mV/div
0.2
0
0.9 1.0 1.1 1.2 1.3 1.4 1.5
SUPPLY VOLTAGE (V)
200µs/div
200ms/div
_______________________________________________________________________________________ 5
Share Link: 