MAX9779 Datasheet, PDF (8/19 Pages) Maxim Integrated Products – 2.6W Stereo Audio Power Amplifier and DirectDrive Headphone Amplifier

2.6W Stereo Audio Power Amplifier and
DirectDrive Headphone Amplifier
Typical Operating Characteristics (continued)
(Measurement BW = 22Hz to 22kHz, T_A = +25°C, unless otherwise noted.)
OUTPUT POWER vs. CHARGE-PUMP
CAPACITANCE AND LOAD RESISTANCE
200
V_DD = 5V
180
f = 1kHz
160
THD+N = 1%
140
120
C1 = C2 = 2.2µF
100
80
60
40 ^{C1 = C2 = 1µF}
20
0
10
20
30
40
50
LOAD RESISTANCE (Ω)
HEADPHONE OUTPUT SPECTRUM
0
V_DD = 5V
-20
f = 1kHz
V_OUT = -60dB
-40
R_L = 32Ω
-60
-80
-100
-120
-140
0
5
10
15
20
FREQUENCY (Hz)
SHDN
TURN-ON RESPONSE
(HEADPHONE MODE)
MAX9750/51 toc28
5V/div
SHDN
TURN-OFF RESPONSE
(HEADPHONE MODE)
MAX9750/51 toc29
5V/div
HPOUT_
20mV/div
HPOUT_
20mV/div
R_L = 32Ω
10ms/div
R_L = 32Ω
10ms/div
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
18
16 _{HPS = GND}
14
12
10
HPS = V_DD
8
6
4
2
0
4.50
4.75
5.00
5.25
5.50
SUPPLY VOLTAGE (V)
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
4.50
4.75
5.00
5.25
5.50
SUPPLY VOLTAGE (V)
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