Datasheet

MAX98355A/MAX98355B
PCM Input Class D Audio Power Amplifiers
11Maxim Integrated
Typical Operating Characteristics (continued)
(V
DD
= 5V, V
G
ND
= 0V, GAIN = V
DD
(+6dB). BCLK = 3.072MHz, LRCLK = 48kHz, speaker loads (Z
SPK
) connected between OUTP
and OUTN, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25NC.)
OUTPUT POWER vs. LOAD RESISTANCE
MAX98355A/B toc15
LOAD (I)
OUTPUT POWER (W)
10
0.5
1.0
1.5
2.0
2.5
0
1 100
V
DD
= 3.7V
GAIN = 12dB
Z
SPK
= R
LOAD
I + 68µH
THD+N = 10%
THD+N = 1%
10k1k10010 100k
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX98355A/B toc12
FREQUENCY (Hz)
THD+N RATIO (dB)
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
V
DD
= 3.7V
GAIN = 12dB
Z
SPK
= 4I + 33µH
P
OUT
= 150mW
P
OUT
= 600mW
0.5
1.0
1.5
2.0
2.5
3.0
0
OUTPUT POWER vs. LOAD RESISTANCE
MAX98355A/B toc16
LOAD (I)
OUTPUT POWER (W)
101 100
V
DD
= 4.2V
GAIN = 12dB
Z
SPK
= R
LOAD
I + 68µH
THD+N = 10%
THD+N = 1%
10k1k10010 100k
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX98355A/B toc13
FREQUENCY (Hz)
THD+N RATIO (dB)
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
V
DD
= 4.2V
GAIN = 12dB
Z
SPK
= 4I + 33µH
P
OUT
= 250mW
P
OUT
= 850mW
0.5
1.0
1.5
2.0
3.0
2.5
4.5
4.0
3.5
0
OUTPUT POWER vs. LOAD RESISTANCE
MAX98355A/B toc17
LOAD (I)
OUTPUT POWER (W)
101 100
V
DD
= 5V
GAIN = 12dB
Z
SPK
= R
LOAD
I + 68µH
THD+N = 10%
THD+N = 1%
10k1k10010 100k
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX98355A/B toc14
FREQUENCY (Hz)
THD+N RATIO (dB)
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
V
DD
= 5V
GAIN = 12dB
Z
SPK
= 4I + 33µH
P
OUT
= 1.5W
P
OUT
= 350mW