
MAX9773
1.8W, Filterless, Ultra-Low EMI,
Stereo Class D Audio Power Amplifier
4
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Typical Operating Characteristics
(VDD = VPVDD = VSHDN = 3.3V, VGND = VPGND = 0V, SYNC = VDD (SSM), gain = 12dB (GAIN1 = 1, GAIN2 = 1)).
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX9773
toc01
FREQUENCY (Hz)
THD+N
(%)
10k
1k
100
10
100k
VDD = 5V
RL = 4
OUTPUT POWER = 600mW
OUTPUT POWER = 300mW
OUTPUT POWER = 100mW
0.1
0.01
1
10
0.001
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX9773
toc02
FREQUENCY (Hz)
THD+N
(%)
10k
1k
100
0.1
0.01
1
10
0.001
10
100k
VDD = 5V
RL = 8
OUTPUT POWER = 250mW
OUTPUT POWER = 100mW
OUTPUT POWER = 500mW
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX9773
toc03
FREQUENCY (Hz)
THD+N
(%)
10k
1k
100
10
100k
VDD = 3.3V
RL = 4
OUTPUT POWER = 100mW
OUTPUT POWER = 600mW
OUTPUT POWER = 300mW
0.1
0.01
1
10
0.001
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX9773
toc04
FREQUENCY (Hz)
THD+N
(%)
10k
1k
100
10
100k
VDD = 3.3V
RL = 8
OUTPUT POWER = 100mW
OUTPUT POWER = 400mW
OUTPUT POWER = 250mW
0.1
0.01
1
10
0.001
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX9773
toc05
FREQUENCY (Hz)
THD+N
(%)
10k
1k
100
10
100k
VDD = 5V
RL = 8
POUT = 800mW
FFM
SSM
0.1
0.01
1
10
0.001
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX9773
toc06
OUTPUT POWER (W)
THD+N
(%)
2.5
2.0
1.5
1.0
0.5
0.1
0.01
10
1
100
0.001
0
VDD = 5V
RL = 4
fIN = 20Hz
fIN = 20kHz
fIN = 1kHz
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX9773
toc07
OUTPUT POWER (W)
THD+N
(%)
1.5
1.2
0.9
0.6
0.3
0.01
0.1
1
10
100
0.001
01.8
VDD = 5V
RL = 8
fIN = 1kHz
fIN = 20Hz
fIN = 20kHz
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX9773
toc08
OUTPUT POWER (W)
THD+N
(%)
1.0
0.8
0.6
0.4
0.2
0.1
0.01
10
1.0
100
0.001
0
VDD = 3.3V
RL = 4
fIN = 20Hz
fIN = 1kHz
fIN = 20kHz
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX9773
toc09
OUTPUT POWER (W)
THD+N
(%)
0.6
0.4
0.2
0.1
0.01
1
10
100
0.001
00.8
VDD = 3.3V
RL = 8
fIN = 1kHz
fIN = 20Hz
fIN = 20kHz