MAX9725 Maxim Integrated Products, MAX9725 Datasheet - Page 5

• Manufacturer Part Number: MAX9725
• Description: Stereo Headphone Amplifier
• Manufacturer: Maxim Integrated Products

(V
to 22kHz, T
DD
1V, Low-Power, DirectDrive, Stereo Headphone
0.7
0.6
0.5
0.4
0.3
0.2
0.1
80
70
60
50
40
30
20
10
40
35
30
25
20
15
10
= 1.5V, PGND = SGND = 0V, V
0
0
5
0
0.9
10
0
CAPACITANCE AND LOAD RESISTANCE
C1 = C2 = 0.47µF
OUTPUT POWER vs. CHARGE-PUMP
A
= +25°C, unless otherwise noted.) (See the Functional Diagram.)
10
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
POWER DISSIPATION
20
vs. OUTPUT POWER
R
R
L
OUTPUT POWER (mW)
LOAD RESISTANCE (Ω)
SUPPLY VOLTAGE (V)
L
= 16Ω
C1 = C2 = 0.68µF
1.1
C1 = C2 = 2.2µF
= 32Ω
20
_______________________________________________________________________________________
30
C1 = C2 = 1µF
V
f
P
OUTPUTS IN-PHASE
IN
DD
OUT
30
= 1kHz
= 1.5V
1.3
= P
OUTL
V
f
THD+N = 1%
40
IN
DD
40
= 1kHz
= 1.5V
+ P
SHDN
OUTR
1.5
50
50
= 1.5V, V
500mV/div
1V/div
SHDN
OUT_
-100
-120
-140
-160
Typical Operating Characteristics (continued)
-20
-40
-60
-80
35
30
25
20
15
10
0
5
0
SS
0
0
= PV
SS,
POWER DISSIPATION
R
5
OUTPUT SPECTRUM
5
EXITING SHUTDOWN
vs. OUTPUT POWER
R
L
L
OUTPUT POWER (mW)
= 16Ω
vs. FREQUENCY
C1 = C2 = 1µF, C
= 32Ω
FREQUENCY (kHz)
Amplifier with Shutdown
200µs/div
10
10
V
f
P
OUTPUTS IN-PHASE
IN
DD
OUT
= 1kHz
= 1V
= P
f
R
V
V
IN
L
OUT
DD
15
15
OUTL
= 1kHz
= 32Ω
= 1.5V
= -60dBV
MAX9725 toc23
+ P
IN
OUTR
= 1µF, THD+N measurement bandwidth = 22Hz
20
20
-10
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
-1
-2
-3
-4
-5
-6
-7
-8
-9
2
1
0
0
0.9
10
NO LOAD
POWER-UP/-DOWN WAVEFORM
1.0
100
vs. SUPPLY VOLTAGE
SUPPLY CURRENT
SUPPLY VOLTAGE (V)
GAIN FLATNESS
vs. FREQUENCY
1.1
FREQUENCY (Hz)
200ms/div
1.2
1k
1.3
10k
MAX9725toc24
1.4
100k
1.5
5
V
1V/div
OUT_
10mV/div
DD