Datasheet

5Maxim Integrated
Mono 3.2W Class D Amplifier
MAX98304
Typical Operating Characteristics (continued)
(V
PVDD
= V
SHDN
= 5.0V, V
PGND
= 0V, A
V
= 6dB, R
L
= J, R
L
connected between OUT+ to OUT-, AC measurement bandwidth 20Hz
to 22kHz, T
A
= +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 (%)
1.51.00.50
0.01
0.1
1
10
100
0.001
2.0
V
PVDD
= 5V
Z
LOAD
= 8I + 68µH
f = 6000Hz
f = 1000Hz
f = 100Hz
OUTPUT POWER vs. LOAD RESISTANCE
MAX98304 toc13
R
LOAD
(I)
OUTPUT POWER (W)
10010
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
0
1 1000
V
PVDD
= 5.0V
THD+N = 10%
THD+N = 1%
OUTPUT POWER vs. SUPPLY VOLTAGE
MAX98304 toc16
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)
5.04.54.03.53.0
0.5
1.0
1.5
2.0
2.5
0
2.5 5.5
f = 1kHz
Z
LOAD
= 8I + 68µH
THD+N = 10%
THD+N = 1%
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX98304 toc11
OUTPUT POWER (W)
THD+N (%)
1.20.90.60.3
0.01
0.1
1
10
100
0.001
0 1.5
V
PVDD
= 4.2V
Z
LOAD
= 8I + 68µH
f = 6000Hz
f = 1000Hz
f = 100Hz
OUTPUT POWER vs. LOAD RESISTANCE
MAX98304 toc14
R
LOAD
(I)
OUTPUT POWER (W)
10010
0.5
1.0
1.5
2.0
2.5
0
1 1000
V
PVDD
= 3.7V
THD+N = 10%
THD+N = 1%
FREQUENCY (Hz)
1k
100k
AMPLITUDE (dB)
10k10010
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 (%)
1.00.80.60.40.2
0.01
0.1
1
10
100
0.001
0 1.2
V
PVDD
= 3.7V
Z
LOAD
= 8I + 68µH
f = 6000Hz
f = 1000Hz
f = 100Hz
OUTPUT POWER vs. SUPPLY VOLTAGE
MAX98304 toc15
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)
5.04.54.03.53.0
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
Z
LOAD
= 4I + 33µH
THD+N = 10%
THD+N = 1%
EFFICIENCY vs. OUTPUT POWER
MAX98304 toc18
OUTPUT POWER (W)
EFFICIENCY (%)
3.02.51.5 2.01.00.5
10
20
30
40
50
60
70
80
90
100
0
0 3.5
V
PVDD
= 5.0V
Z
LOAD
= 8I + 68µH
Z
LOAD
= 4I + 33µH