Datasheet
MAX4409
80mW, DirectDrive, Stereo Headphone
Amplifier with Common-Mode Sense
4 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(C1 = C2 = 2.2µF, R
IN
= R
F
= R1 = R2 = 10kΩ, THD+N measurement bandwidth = 22Hz to 22kHz, T
A
= +25°C, unless otherwise noted.)
1
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
0.001
0.01
0.1
MAX4409 toc04
V
DD
= 1.8V
R
L
= 32Ω
THD+N (%)
P
OUT
= 15mW
P
OUT
= 5mW
10 100 10k1k 100k
FREQUENCY (Hz)
100
10
1
0.1
0.01
0.001
090
120
150
30 60
180
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX4409 toc05
OUTPUT POWER (W)
THD+N (%)
V
DD
= 3V
f = 20Hz
R
L
= 16Ω
OUTPUTS
OUT OF
PHASE
OUTPUTS
IN PHASE
100
10
1
0.1
0.01
0.001
090
120
150
30 60
180
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX4409 toc06
OUTPUT POWER (W)
THD+N (%)
V
DD
= 3V
f = 1kHz
R
L
= 16Ω
OUTPUTS IN
PHASE
OUTPUTS
OUT OF
PHASE
100
10
1
0.1
0.01
0.001
09060
120 150
30 180
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX4409 toc07
OUTPUT POWER (W)
THD+N (%)
V
DD
= 3V
f = 10kHz
R
L
= 16Ω
OUTPUTS IN
PHASE
OUTPUTS
OUT OF
PHASE
100
10
1
0.1
0.01
0.001
0.0001
0
40
60
8020
120
100
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX4409 toc08
OUTPUT POWER (W)
THD+N (%)
V
DD
= 3V
f = 20Hz
R
L
= 32Ω
OUTPUTS IN
PHASE
OUTPUTS
OUT OF
PHASE
100
10
1
0.1
0.01
0.001
0
40 100
60
80
20 120
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX4409 toc09
OUTPUT POWER (W)
THD+N (%)
V
DD
= 3V
f = 1kHz
R
L
= 32Ω
OUTPUTS IN
PHASE
OUTPUTS
OUT OF
PHASE
100
10
1
0.1
0.01
0.001
0 40 100
8060
20 120
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX4409 toc10
OUTPUT POWER (W)
THD+N (%)
V
DD
= 3V
f = 10kHz
R
L
= 32Ω
OUTPUTS IN
PHASE
OUTPUTS
OUT OF
PHASE
100
10
1
0.1
0.01
0.001
02040503010 60
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX4409 toc11
OUTPUT POWER (W)
THD+N (%)
V
DD
= 1.8V
f = 20Hz
R
L
= 16Ω
OUTPUTS IN
PHASE
OUTPUTS
OUT OF
PHASE
100
10
1
0.1
0.01
0.001
02040503010 60
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX4409 toc12
OUTPUT POWER (W)
V
DD
= 1.8V
f = 1kHz
R
L
= 16Ω
THD+N (%)
OUTPUTS IN
PHASE
OUTPUTS
OUT OF
PHASE