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ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsLinear IC - Audio amplifier Headphones (2-channel, stereo) Class AB TQFN 12 (3x3)
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MAX9724A/MAX9724B
60mW, DirectDrive, Stereo Headphone Amplifier
with Low RF Susceptibility and Shutdown
_______________________________________________________________________________________
5
Typical Operating Characteristics (continued)
(V
DD
= 5V, PGND = SGND = 0V, SHDN = V
DD
, C1 = C2 = 1µF, R
L
= ∞, gain = -1.5V/V (R
IN
= 20kΩ, R
F
= 30kΩ for the MAX9724A),
THD+N measurement bandwidth = 22Hz to 22kHz, both outputs driven in phase, T
A
= +25°C, unless otherwise noted.)
10 1k100 10k 100k
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY (UCSP)
MAX9724 toc10
FREQUENCY (Hz)
THD+N (%)
1
0.1
0.001
0.01
V
DD
= 3V
R
L
= 16Ω
P
OUT
= 5mW
P
OUT
= 10mW
10 1k100 10k 100k
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY (TQFN)
MAX9724 toc11
FREQUENCY (Hz)
THD+N (%)
1
0.1
0.001
0.01
V
DD
= 3V
R
L
= 32Ω
P
OUT
= 8mW
P
OUT
= 15mW
10 1k100 10k 100k
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY (UCSP)
MAX9724 toc12
FREQUENCY (Hz)
THD+N (%)
1
0.1
0.001
0.01
V
DD
= 3V
R
L
= 32Ω
P
OUT
= 8mW
P
OUT
= 13mW
10 1k100 10k 100k
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY (TQFN)
MAX9724 toc13
FREQUENCY (Hz)
THD+N (%)
1
0.1
0.001
0.01
V
DD
= 5V
R
L
= 16Ω
P
OUT
= 20mW
P
OUT
= 37mW
10 1k100 10k 100k
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY (UCSP)
MAX9724 toc14
FREQUENCY (Hz)
THD+N (%)
1
0.1
0.001
0.01
V
DD
= 5V
R
L
= 16Ω
P
OUT
= 20mW
P
OUT
= 32mW
10 1k100 10k 100k
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY (TQFN)
MAX9724 toc15
FREQUENCY (Hz)
THD+N (%)
1
0.1
0.001
0.01
V
DD
= 5V
R
L
= 32Ω
P
OUT
= 50mW
P
OUT
= 30mW
10 1k100 10k 100k
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY (UCSP)
MAX9724 toc16
FREQUENCY (Hz)
THD+N (%)
1
0.1
0.001
0.01
V
DD
= 5V
R
L
= 32Ω
P
OUT
= 45mW
P
OUT
= 20mW
0
20
10
40
30
60
50
70
2.5 3.5 4.03.0 4.5 5.0 5.5
OUTPUT POWER
vs. SUPPLY VOLTAGE (TQFN)
MAX9724 toc17
SUPPLY VOLTAGE (V)
OUTPUT POWER (mW)
f
IN
= 1kHz
R
L
= 16Ω
1% THD+N
10% THD+N
0
20
10
40
30
60
50
70
2.5 3.5 4.03.0 4.5 5.0 5.5
OUTPUT POWER
vs. SUPPLY VOLTAGE (UCSP)
MAX9724 toc18
SUPPLY VOLTAGE (V)
OUTPUT POWER (mW)
f
IN
= 1kHz
R
L
= 16Ω
1% THD+N
10% THD+N