Datasheet

MAX4411
80mW, Fixed-Gain, DirectDrive, Stereo
Headphone Amplifier with Shutdown
_______________________________________________________________________________________ 7
Typical Operating Characteristics (continued)
(C1 = C2 = 2.2µF, THD+N measurement bandwidth = 22Hz to 22kHz, T
A
= +25°C, unless otherwise noted.)
GAIN FLATNESS vs. FREQUENCY
MAX4411 toc34
FREQUENCY (Hz)
GAIN (dB)
100k10k1k100
-20
-25
-15
-10
-5
0
5
10
-30
10 1M
V
DD
= 3V
R
L
= 16Ω
A
V
= -1.5V/V A
V
= -2V/V
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX4411 toc38
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
2.71.80.9
2
4
6
8
10
0
03.6
POWER DISSIPATION
vs. OUTPUT POWER
MAX4411 toc31
OUTPUT POWER (mW)
POWER DISSIPATION (mW)
16012040 80
20
40
60
80
120
100
140
160
180
0
0 200
INPUTS 180°
OUT OF PHASE
f
IN
= 1kHz
R
L
= 32Ω
V
DD
= 3V
P
OUT
= P
OUTL
+ P
OUTR
INPUTS
IN PHASE
POWER DISSIPATION
vs. OUTPUT POWER
MAX4411 toc32
OUTPUT POWER (mW)
POWER DISSIPATION (mW)
50403010 20
20
40
60
80
100
120
140
0
060
INPUTS 180°
OUT OF PHASE
f
IN
= 1kHz
R
L
= 16Ω
V
DD
= 1.8V
P
OUT
= P
OUTL
+ P
OUTR
INPUTS
IN PHASE
POWER DISSIPATION
vs. OUTPUT POWER
MAX4411 toc33
OUTPUT POWER (mW)
POWER DISSIPATION (mW)
50403010 20
10
20
30
40
50
60
70
0
060
INPUTS 180°
OUT OF PHASE
f
IN
= 1kHz
R
L
= 32Ω
V
DD
= 1.8V
P
OUT
= P
OUTL
+ P
OUTR
INPUTS
IN PHASE
CHARGE-PUMP OUTPUT RESISTANCE
vs. SUPPLY VOLTAGE
MAX4411 toc35
SUPPLY VOLTAGE (V)
OUTPUT RESISTANCE (Ω)
3.33.02.72.42.1
2
4
6
8
10
0
1.8 3.6
V
IN_
= GND
I
PVSS
= 10mA
NO LOAD
OUTPUT POWER vs. CHARGE-PUMP
CAPACITANCE AND LOAD RESISTANCE
MAX4411 toc36
LOAD RESISTANCE (Ω)
OUTPUT POWER (mW)
403020
20
10
30
40
50
60
70
80
90
0
10 50
f
IN
= 1kHz
THD+N = 1%
INPUTS IN PHASE
C1 = C2 = 1μF
C1 = C2 = 0.47μF
C1 = C2 = 0.68μF
C1 = C2 = 2.2μF
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX4411 toc39
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (μA)
2.71.80.9
2
4
6
8
10
0
03.6
SHDNL = SHDNR = GND
FREQUENCY (kHz)
101
0.1 100
OUTPUT SPECTRUM vs. FREQUENCY
MAX4411 toc37
OUTPUT SPECTRUM (dB)
-100
-80
-60
-40
-20
0
-120
V
OUT
= 1V
P-P
f
IN
= 1kHz
R
L
= 32Ω