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)
0
100
50
200
150
250
300
0 40 6020 80 100 120
POWER DISSIPATION
vs. OUTPUT POWER
MAX9723 toc10
OUTPUT POWER (mW)
POWER DISSIPATION (mW)
R
L
= 16Ω
V
DD
= 3V
f
IN
= 1kHz
P
OUT
= P
OUTL
+ P
OUTR
OUTPUTS IN PHASE
R
L
= 32Ω
OUTPUT POWER
vs. LOAD RESISTANCE
MAX9723 toc11
LOAD RESISTANCE (W)
OUTPUT POWER (mW)
100
10
20
30
40
50
60
70
80
0
10 1k
V
DD
= 2.4V
f
IN
= 1kHz
THD+N = 10%
THD+N = 1%
OUTPUT POWER
vs. LOAD RESISTANCE
MAX9723 toc12
LOAD RESISTANCE (Ω)
OUTPUT POWER (mW)
100
10
20
30
40
50
60
70
80
90
100
0
10 1k
V
DD
= 3V
f
IN
= 1kHz
THD+N = 10%
THD+N = 1%
OUTPUT POWER
vs. SUPPLY VOLTAGE
MAX9723 toc13
SUPPLY VOLTAGE (V)
OUTPUT POWER (mW)
3.43.22.8 3.02.2 2.4 2.62.0
10
20
30
40
50
60
70
80
90
100
0
1.8 3.6
THD+N = 10%
THD+N = 1%
f
IN
= 1kHz
R
L
= 16Ω
20
40
60
80
100
120
140
0
OUTPUT POWER
vs. SUPPLY VOLTAGE
MAX9723 toc14
SUPPLY VOLTAGE (V)
OUTPUT POWER (mW)
3.43.22.8 3.02.2 2.4 2.62.01.8 3.6
THD+N = 10%
THD+N = 1%
f
IN
= 1kHz
R
L
= 32Ω
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX9723 toc15
FREQUENCY (Hz)
PSRR (dB)
10k1k100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
10 100k
R
L
= 32Ω
MAX9723 Stereo DirectDrive Headphone Amplier
with BassMax, Volume Control, and I
2
C
Maxim Integrated │ 6
www.maximintegrated.com
Typical Operating Characteristics (continued)