Datasheet

MAX98355A/MAX98355B
PCM Input Class D Audio Power Amplifiers
9Maxim Integrated
Typical Operating Characteristics
(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.)
General
Speaker Amplifier
QUIESCENT CURRENT
vs. SUPPLY VOLTAGE
MAX98355A/B toc01
QUIESCENT CURRENT (mA)
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0
SUPPLY VOLTAGE (V)
5.04.54.03.53.02.5 5.5
0.1
0.2
0.3
0.4
0.5
0.6
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
MAX98355A/B toc02
SHUTDOWN CURRENT (µA)
0.7
0
SUPPLY VOLTAGE (V)
5.04.54.03.53.02.5 5.5
10.10.010.001 10
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX98355A/B toc03
OUTPUT POWER (W)
THD+N RATIO (dB)
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
V
DD
= 3.7V
GAIN = 12dB
Z
SPK
= 8I + 68µH
f = 6kHz
f = 1kHz
f = 100Hz
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX98355A/B toc04
OUTPUT POWER (W)
THD+N RATIO (dB)
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
V
DD
= 4.2V
GAIN = 12dB
Z
SPK
= 8I + 68µH
f = 6kHz
f = 1kHz
f = 100Hz
10.10.010.001 10
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX98355A/B toc05
OUTPUT POWER (W)
THD+N RATIO (dB)
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
10.10.010.001 10
f = 6kHz
f = 1kHz
f = 100Hz
V
DD
= 5V
GAIN = 12dB
Z
SPK
= 8I + 68µH