
5
Maxim Integrated
Mono 3.2W Class D Amplifier
MAX98304
Typical Operating Characteristics (continued)
(VPVDD = VSHDN = 5.0V, VPGND = 0V, AV = 6dB, RL = J, RL connected between OUT+ to OUT-, AC measurement bandwidth 20Hz
to 22kHz, TA = +25NC, unless otherwise noted.)
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX98304
toc10
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
OUTPUT POWER (W)
THD+N
(%)
1.5
1.0
0.5
0
0.01
0.1
1
10
100
0.001
2.0
VPVDD = 5V
ZLOAD = 8I + 68H
f = 6000Hz
f = 1000Hz
f = 100Hz
OUTPUT POWER vs. LOAD RESISTANCE
MAX98304
toc13
RLOAD (I)
OUTPUT
POWER
(W)
100
10
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
0
1
1000
VPVDD = 5.0V
THD+N = 10%
THD+N = 1%
OUTPUT POWER vs. SUPPLY VOLTAGE
MAX98304
toc16
SUPPLY VOLTAGE (V)
OUTPUT
POWER
(W)
5.0
4.5
4.0
3.5
3.0
0.5
1.0
1.5
2.0
2.5
0
2.5
5.5
f = 1kHz
ZLOAD = 8I + 68H
THD+N = 10%
THD+N = 1%
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX98304
toc11
OUTPUT POWER (W)
THD+N
(%)
1.2
0.9
0.6
0.3
0.01
0.1
1
10
100
0.001
0
1.5
VPVDD = 4.2V
ZLOAD = 8I + 68H
f = 6000Hz
f = 1000Hz
f = 100Hz
OUTPUT POWER vs. LOAD RESISTANCE
MAX98304
toc14
RLOAD (I)
OUTPUT
POWER
(W)
100
10
0.5
1.0
1.5
2.0
2.5
0
1
1000
VPVDD = 3.7V
THD+N = 10%
THD+N = 1%
FREQUENCY (Hz)
1k
100k
AMPLITUDE
(dB)
10k
100
10
GAIN vs. FREQUENCY
MAX98304
toc17
-30
-20
-10
0
10
20
GAIN = PGND
GAIN = 100kI TO PGND
GAIN = 100kI TO PVDD
GAIN = UNCONNECTED
-40
GAIN = PVDD
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX98304
toc12
OUTPUT POWER (W)
THD+N
(%)
1.0
0.8
0.6
0.4
0.2
0.01
0.1
1
10
100
0.001
0
1.2
VPVDD = 3.7V
ZLOAD = 8I + 68H
f = 6000Hz
f = 1000Hz
f = 100Hz
OUTPUT POWER vs. SUPPLY VOLTAGE
MAX98304
toc15
SUPPLY VOLTAGE (V)
OUTPUT
POWER
(W)
5.0
4.5
4.0
3.5
3.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
0
2.5
5.5
f = 1kHz
ZLOAD = 4I + 33H
THD+N = 10%
THD+N = 1%
EFFICIENCY vs. OUTPUT POWER
MAX98304
toc18
OUTPUT POWER (W)
EFFICIENCY
(%)
3.0
2.5
1.5
2.0
1.0
0.5
10
20
30
40
50
60
70
80
90
100
0
3.5
VPVDD = 5.0V
ZLOAD = 8I + 68H
ZLOAD = 4I + 33H