MAX9726 Maxim Integrated Products, MAX9726 Datasheet - Page 6

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

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4
DirectDrive, Headphone Amplifier with
BassMax, I
(V
ume (overall gain = 0dB), BassMax disabled. Load connected between OUT_ and PGND where specified. Outputs in phase, both
channels loaded. T
6
DD
0.001
0.01
_______________________________________________________________________________________
0.1
10
= SHDN = 5V, PGND = SGND = 0V, C1 = C2 = 1µF, C
1
10
OUTPUT POWER = 80mW
V
R
CC
L
TOTAL HARMONIC DISTORTION
= 32Ω
PLUS NOISE vs. FREQUENCY
= 5V
100
180
160
140
120
100
120
100
80
60
40
20
80
60
40
20
0
0
FREQUENCY (Hz)
A
2.5
10
= +25°C, unless otherwise noted.) (See the Functional Diagram/Typical Operating Circuit)
OUTPUT POWER = 40mW
1k
THD+N = 10%
3.0
THD+N = 1%
vs. SUPPLY VOLTAGE
vs. LOAD RESISTANCE
LOAD RESISTANCE (Ω)
SUPPLY VOLTAGE (V)
2
OUTPUT POWER
3.5
OUTPUT POWER
10k
C, Volume and Gain Control
THD+N = 10%
THD+N = 1%
100
4.0
V
100k
DD
= 3.3V, f
4.5
R
f
IN
L
IN
5.0
= 16Ω
= 1kHz
= 1kHz
Typical Operating Characteristics (continued)
600
500
400
300
200
100
0
1000
0
5.5
V
f
P
IN
DD
OUT
= 1kHz
R
= 3.3V
= P
L
40
= 16Ω
TOTAL OUTPUT POWER (mW)
PREG
OUTR
POWER DISSIPATION
vs. OUTPUT POWER
+ P
80
OUTL
= C
NREG
120
= 1µF, BM_ = 0V, R
R
L
160
= 32Ω
160
140
120
100
210
180
150
120
80
60
40
20
90
60
30
0
0
2.5
10
200
THD+N = 1%
3.0
vs. LOAD RESISTANCE
vs. SUPPLY VOLTAGE
THD+N = 10%
1000
LOAD RESISTANCE (Ω)
SUPPLY VOLTAGE (V)
900
800
700
600
500
400
300
200
100
OUTPUT POWER
OUTPUT POWER
3.5
THD+N = 10%
0
IN
0
= 10kΩ, R
THD+N = 1%
V
f
P
100
4.0
IN
DD
OUT
= 1kHz
40
V
= 5V
= P
DD
R
TOTAL OUTPUT POWER (mW)
L
4.5
POWER DISSIPATION
OUTR
= 5V, f
vs. OUTPUT POWER
= 16Ω
80
F
+ P
R
f
IN
IN
= 10kΩ, maximum vol-
L
5.0
= 1kHz
OUTL
= 1kHz
= 32Ω
120
1000
5.5
160
R
L
200
= 32Ω
240