Datasheet

(V
DD
= SHDN = 3V, PGND = SGND = 0V, C1 = C2 = 1μF, BB_ = 0V, gain = 0dB, maximum volume, BassMax disabled. Load connected
between OUT_ and SGND where specied. Outputs in phase, both channels loaded. T
A
= +25°C, unless otherwise noted.) (See Func-
tional Diagram/Typical Operating Circuit)
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9723 toc02
FREQUENCY (Hz)
THD+N (%)
10k1k100
0.01
0.1
1
0.001
10 100k
V
DD
= 2.4V
R
L
= 32Ω
P
OUT
= 23mW
P
OUT
= 10mW
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9723 toc03
FREQUENCY (Hz)
THD+N (%)
10k1k100
0.01
0.1
1
0.001
10 100k
V
DD
= 3V
R
L
= 16Ω
P
OUT
= 37mW
P
OUT
= 20mW
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9723 toc04
FREQUENCY (Hz)
THD+N (%)
10k1k100
0.01
0.1
1
0.001
10 100k
V
DD
= 3V
R
L
= 32Ω
P
OUT
= 30mW
P
OUT
= 10mW
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9723 toc05
OUTPUT POWER (mW)
THD+N (%)
4020
0.01
0.1
1
10
100
0.001
0 60
V
DD
= 2.4V
R
L
= 16Ω
f
IN
= 1kHz
f
IN
= 20Hz
f
IN
= 10kHz
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9723 toc06
OUTPUT POWER (mW)
THD+N (%)
4020
0.01
0.1
1
10
100
0.001
0 60
V
DD
= 2.4V
R
L
= 32Ω
f
IN
= 1kHz
f
IN
= 10kHz
f
IN
= 20Hz
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9723 toc07
OUTPUT POWER (mW)
THD+N (%)
80604020
0.01
0.1
1
10
100
0.001
0 100
V
DD
= 3V
R
L
= 16Ω
f
IN
= 10kHz
f
IN
= 1kHz
f
IN
= 20Hz
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9723 toc01
FREQUENCY (Hz)
THD+N (%)
10k1k100
0.01
0.1
1
0.001
10 100k
V
DD
= 2.4V
R
L
= 16Ω
P
OUT
= 10mW
P
OUT
= 25mW
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9723 toc08
OUTPUT POWER (mW)
THD+N (%)
80604020
0.01
0.1
1
10
100
0.001
0 100
V
DD
= 3V
R
L
= 32Ω
f
IN
= 10kHz
f
IN
= 1kHz
f
IN
= 20Hz
0
40
60
80
100
120
140
160
180
0 20 40 60 80
POWER DISSIPATION
vs. OUTPUT POWER
MAX9723 toc09
OUTPUT POWER (mW)
POWER DISSIPATION (mW)
20
V
DD
= 2.4V
f
IN
= 1kHz
P
OUT
= P
OUTL
+ P
OUTR
OUTPUTS IN PHASE
R
L
= 32Ω
R
L
= 16Ω
MAX9723 Stereo DirectDrive Headphone Amplier
with BassMax, Volume Control, and I
2
C
Maxim Integrated │ 5
www.maximintegrated.com
Typical Operating Characteristics