Datasheet

MAX9708
20W/40W, Filterless, Spread-Spectrum,
Mono/Stereo, Class D Amplifier
6
Maxim Integrated
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY
MAX9708 toc10
FREQUENCY (Hz)
THD+N (%)
10k1k100
0.1
10 100k
1
0.01
PV
DD
= 18V,
4Ω MONO MODE,
P
OUT
= 18W
WIDEBAND OUTPUT SPECTRUM
(SSM MODE)
MAX9708 toc11
FREQUENCY (Hz)
OUTPUT AMPLITUDE (dBV)
10M1M
-60
-50
-40
-30
-20
-10
0
10
20
30
-70
100k 100M
10kHz RBW
WIDEBAND OUTPUT SPECTRUM
(FFM MODE)
MAX9708 toc12
FREQUENCY (Hz)
OUTPUT AMPLITUDE (dBV)
10M1M100k 100M
10kHz RBW
-60
-50
-40
-30
-20
-10
0
10
20
30
-70
OUTPUT FREQUENCY SPECTRUM
(SSM MODE)
MAX9708 toc13
FREQUENCY (kHz)
OUTPUT AMPLITUDE (dBV)
20161284
-100
-80
-60
-40
-20
0
-120
024
OUTPUT FREQUENCY SPECTRUM
(FFM MODE)
MAX9708 toc14
FREQUENCY (kHz)
OUTPUT AMPLITUDE (dBV)
20161284
-100
-80
-60
-40
-20
0
-120
024
Typical Operating Characteristics (continued)
(PV
DD
= V
DD
= +18V, PGND = GND = 0V, C
SS
= 0.47µF, C
REG
= 0.01µF, C1 = 0.1µF, C2 = 1µF, R
LOAD
= ∞, SHDN = high, MONO
= low, MUTE = high, G1 = low, G2 = high, FS1 = FS2 = high (SSM), SYNCIN = low. All load resistors (R
L
) are between OUT_+ and
OUT_-, T
A
= +25°C, unless otherwise stated.)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
MAX9708 toc09
OUTPUT POWER (W)
THD+N (%)
2015105
0.1
1
10
100
0.01
025
PV
DD
= 12V,
MONO MODE,
f
IN
= 1kHz
R
L
= 4Ω