MAX9729 Maxim Integrated Products, MAX9729 Datasheet - Page 6

• Manufacturer Part Number: MAX9729
• Description: Stereo Headphone Amplifier
• Manufacturer: Maxim Integrated Products

Stereo Headphone Amplifier with BassMax,
Volume Control, and Input Mux
(V
BM_ = 0V, maximum gain setting = 3.5dB, volume attenuation setting = 0dB (total voltage gain = 3.5dB), BassMax disabled. Load
connected between OUT_ and PGND where specified. THD+N measurement BW = 22Hz to 22kHz. Both channels loaded and driven
in phase. T
6
DD
0.001
0.01
0.01
0.01
100
_______________________________________________________________________________________
100
0.1
0.1
0.1
10
10
= PV
1
1
1
10
0
0
V
R
TOTAL HARMONIC DISTORTION PLUS
TOTAL HARMONIC DISTORTION PLUS
V
R
TOTAL HARMONIC DISTORTION PLUS
V
R
f
DD
L
DD
L
IN
f
DD
L
DD
IN
= 16Ω
= 16Ω
A
= 32Ω
5
10
= 1kHz
= 3V
OUTPUT POWER PER CHANNEL (mW)
= 2.4V
= 1kHz
OUTPUT POWER PER CHANNEL (mW)
= 2.4V
= +25°C, unless otherwise noted.)
P
NOISE vs. OUTPUT POWER
NOISE vs. OUTPUT POWER
P
= SHDN = 3V, PGND = SGND = 0V, C1 = C2 = C3 = 1µF, C
10 15 20 25 30 35 40 45 50
OUT
OUT
NOISE vs. FREQUENCY
100
20
f
= 23mW
IN
= 8mW
f
IN
= 100Hz
FREQUENCY (Hz)
= 100Hz
30
1k
40
50
10k
f
60
IN
f
IN
= 5kHz
= 5kHz
70
100k
80
0.001
0.001
0.01
0.01
0.01
100
0.1
0.1
0.1
10
1
1
1
10
10
0
V
R
TOTAL HARMONIC DISTORTION PLUS
TOTAL HARMONIC DISTORTION PLUS
TOTAL HARMONIC DISTORTION PLUS
V
R
V
R
DD
L
DD
L
DD
L
f
IN
= 32Ω
= 16Ω
= 32Ω
10
= 3V
= 1kHz
= 3V
= 2.4V
OUTPUT POWER PER CHANNEL (mW)
P
P
P
NOISE vs. OUTPUT POWER
OUT
P
OUT
OUT
OUT
NOISE vs. FREQUENCY
NOISE vs. FREQUENCY
f
100
100
IN
20
= 23mW
= 3mW
= 100Hz
= 42mW
= 9mW
FREQUENCY (Hz)
FREQUENCY (Hz)
30
1k
1k
40
Typical Operating Characteristics
50
IN
= 1µF (1206 case size, X7R dielectric ceramic capacitor),
f
10k
10k
IN
60
= 5kHz
70
100k
100k
80
0.001
0.01
0.01
350
300
250
200
150
100
100
0.1
0.1
50
10
0
1
1
10
0
0
TOTAL HARMONIC DISTORTION PLUS
V
R
V
f
P
TOTAL HARMONIC DISTORTION PLUS
V
R
IN
DD
L
DD
OUT
DD
L
f
IN
= 32Ω
= 1kHz
20
= 16Ω
5
= 3V
= 3V
OUTPUT POWER PER CHANNEL (mW)
= 2.4V
= 1kHz
= P
P
NOISE vs. OUTPUT POWER
P
10 15 20 25 30 35 40 45 50
OUT
OUT
40
NOISE vs. FREQUENCY
OUTL
100
POWER DISSIPATION
vs. OUTPUT POWER
= 40mW
OUTPUT POWER (mW)
= 5mW
+ P
60
f
FREQUENCY (Hz)
IN
OUTR
= 100Hz
80 100
1k
R
R
L
L
= 16Ω
= 32Ω
120
f
10k
IN
140
= 5kHz
160 180
100k