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)
CROSSTALK
vs. FREQUENCY
-100
-80
-60
-40
-20
0
-120
MAX9723 toc16
FREQUENCY (Hz)
CROSSTALK (dB)
10k1k10010 100k
V
IN
= 1V
P-P
R
L
= 32Ω
A = 0dB
LEFT TO RIGHT
A = 0dB
RIGHT TO LEFT
A = 0dB
CROSSTALK
vs. FREQUENCY
-100
-80
-60
-40
-20
0
-120
MAX9723 toc17
FREQUENCY (Hz)
CROSSTALK (dB)
10k1k10010 100k
V
IN
= 1V
P-P
R
L
= 32Ω
A = -10dB
LEFT TO RIGHT
A = -10dB
RIGHT TO LEFT
A = -10dB
BASS BOOST FREQUENCY
RESPONSE
-5
0
5
10
15
20
-10
MAX9723 toc18
FREQUENCY (Hz)
AMPLITUDE (dB)
10k1k10010 100k
NO LOAD
R1 = 47kΩ
BassMax DISABLED
R2 = 36kΩ
C3 = 0.068µF
R2 = 22kΩ
C3 = 0.1µF
R2 = 10kΩ
C3 = 0.22µF
GAIN FLATNESS
vs. FREQUENCY
-6
-5
-4
-3
-2
-1
0
1
-7
MAX9723 toc19
FREQUENCY (Hz)
AMPLITUDE (dB)
10k1k10010 100k
OUTPUT SPECTRUM
vs. FREQUENCY
MAX9723 toc20
FREQUENCY (kHz)
AMPLITUDE (dBV)
15105
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-140
0 20
R
L
= 32Ω
V
DD
= 3V
f
IN
= 1kHz
CHARGE-PUMP OUTPUT VOLTAGE
vs. OUTPUT CURRENT
MAX9723 toc21
OUTPUT CURRENT (mA)
OUTPUT VOLTAGE (V)
175150125100755025
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0
-3.5
0 200
NO HEADPHONE LOAD
CHARGE-PUMP LOAD
CONNECTED
BETWEEN PV
SS
AND PGND
MAX9723 Stereo DirectDrive Headphone Amplier
with BassMax, Volume Control, and I
2
C
Maxim Integrated │ 7
www.maximintegrated.com
Typical Operating Characteristics (continued)