MAX9725 Maxim Integrated Products, MAX9725 Datasheet - Page 4

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

1V, Low-Power, DirectDrive, Stereo Headphone
Amplifier with Shutdown
(V
to 22kHz, T
4
DD
0.001
-100
0.01
100
-10
-20
-30
-40
-50
-60
-70
-80
-90
_______________________________________________________________________________________
0.1
50
45
40
35
30
25
20
15
10
10
= 1.5V, PGND = SGND = 0V, V
0
1
5
0
10
0.9
0
V
R
f
R
BOTH INPUTS
DRIVEN IN-PHASE
TOTAL HARMONIC DISTORTION PLUS
V
R
A
IN
POWER-SUPPLY REJECTION RATIO
DD
L
L
DD
L
V
= 32Ω
= 1kHz
= 32Ω
A
= 16Ω
= -2V/V
= 1V
= 1V
= +25°C, unless otherwise noted.) (See the Functional Diagram.)
NOISE vs. OUTPUT POWER
100
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
OUTPUT POWER (mW)
vs. FREQUENCY
OUTPUT POWER
1.1
FREQUENCY (Hz)
5
THD+N = 10%
THD+N = 1%
1k
f
f
IN
IN
= 20Hz
= 1kHz
1.3
10
10k
f
IN
= 10kHz
SHDN
100k
1.5
15
= 1.5V, V
0.001
0.01
Typical Operating Characteristics (continued)
100
-100
-120
0.1
-20
-40
-60
-80
80
70
60
50
40
30
20
10
10
0
1
0
SS
10
10
0
TOTAL HARMONIC DISTORTION PLUS
V
R
A
V
P
R
= PV
DD
L
V
DD
OUT
L
= 32Ω
= -2V/V
= 32Ω
THD+N = 10%
= 1V
= 1.5V
CROSSTALK vs. FREQUENCY
= 5mW
NOISE vs. OUTPUT POWER
SS,
100
vs. LOAD RESISTANCE
THD+N = 1%
OUTPUT POWER (mW)
LOAD RESISTANCE (Ω)
C1 = C2 = 1µF, C
OUTPUT POWER
5
FREQUENCY (Hz)
100
1k
f
f
IN
IN
= 20Hz
= 1kHz
V
f
BOTH INPUTS
DRIVEN IN-PHASE
LEFT TO RIGHT
RIGHT TO LEFT
IN
10
DD
f
= 1kHz
IN
= 1.5V
10k
= 10kHz
IN
= 1µF, THD+N measurement bandwidth = 22Hz
100k
15
1k
-100
-110
-10
-20
-30
-40
-50
-60
-70
-80
-90
80
70
60
50
40
30
20
10
0
80
70
60
50
40
30
20
10
0
10
0.9
10
OUTPUT POWER vs. SUPPLY VOLTAGE
V
R
V
f
BOTH INPUTS
DRIVEN IN-PHASE
THD+N = 10%
f
R
BOTH INPUTS
DRIVEN IN-PHASE
POWER-SUPPLY REJECTION RATIO
DD
L
IN
IN
L
DD
= 32Ω
= 1kHz
= 16Ω
= 1kHz
= 1.5V
= 1V
THD+N = 1%
100
vs. LOAD RESISTANCE
LOAD RESISTANCE (Ω)
SUPPLY VOLTAGE (V)
vs. FREQUENCY
OUTPUT POWER
1.1
FREQUENCY (Hz)
100
1k
THD+N = 10%
THD+N = 1%
1.3
10k
100k
1k
1.5