MAX9726 Maxim Integrated Products, MAX9726 Datasheet - Page 5

• Manufacturer Part Number: MAX9726
• Description: Headphone Amplifier
• Manufacturer: Maxim Integrated Products

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4
(V
ume (overall gain = 0dB), BassMax disabled. Load connected between OUT_ and PGND where specified. Outputs in phase, both
channels loaded. T
DD
0.001
0.01
100
0.1
10
= SHDN = 5V, PGND = SGND = 0V, C1 = C2 = 1µF, C
1
0
V
R
DD
L
PLUS NOISE vs. OUTPUT POWER
= 16Ω
TOTAL HARMONIC DISTORTION
20
= 3.3V
f
0.001
IN
0.001
40
0.01
0.01
100
0.1
= 20Hz
0.1
OUTPUT POWER (mW)
10
10
1
1
A
60
10
0
_______________________________________________________________________________________
= +25°C, unless otherwise noted.) (See the Functional Diagram/Typical Operating Circuit)
V
R
V
R
DD
L
DD
L
BassMax, I
OUTPUT POWER = 60mW
PLUS NOISE vs. OUTPUT POWER
80
= 32Ω
TOTAL HARMONIC DISTORTION
20
TOTAL HARMONIC DISTORTION
= 32Ω
= 5V
PLUS NOISE vs. FREQUENCY
= 3.3V
DirectDrive, Headphone Amplifier with
f
100 120 140 160
IN
100
f
40
IN
= 20Hz
= 10kHz
OUTPUT POWER (mW)
FREQUENCY (Hz)
f
IN
60
= 1kHz
OUTPUT POWER = 20mW
f
IN
80
1k
= 1kHz
100 120 140 160
f
IN
10k
= 10kHz
0.001
0.01
100
0.1
10
1
100k
0
2
V
R
DD
L
PLUS NOISE vs. OUTPUT POWER
= 32Ω
f
TOTAL HARMONIC DISTORTION
20
IN
C, Volume and Gain Control
= 3.3V
f
IN
= 20Hz
= 1kHz
40
PREG
OUTPUT POWER (mW)
60
= C
80
NREG
Typical Operating Characteristics
100 120 140 160
f
IN
= 1µF, BM_ = 0V, R
= 10kHz
0.001
0.001
0.01
0.01
0.1
0.1
10
10
1
1
10
10
V
R
V
R
DD
L
DD
L
OUTPUT POWER = 20mW
= 16Ω
TOTAL HARMONIC DISTORTION
= 16Ω
TOTAL HARMONIC DISTORTION
OUTPUT POWER = 40mW
= 5V
PLUS NOISE vs. FREQUENCY
PLUS NOISE vs. FREQUENCY
= 3.3V
100
100
0.001
0.01
100
0.1
10
FREQUENCY (Hz)
1
FREQUENCY (Hz)
IN
OUTPUT POWER = 60mW
OUTPUT POWER = 80mW
0
= 10kΩ, R
V
R
DD
L
1k
1k
20 40 60 80 100 120 140 160 180 200
PLUS NOISE vs. OUTPUT POWER
= 16Ω
TOTAL HARMONIC DISTORTION
= 5V
f
IN
OUTPUT POWER (mW)
10k
= 20Hz
10k
F
f
IN
= 10kΩ, maximum vol-
= 1kHz
100k
100k
f
IN
= 10kHz
5