Datasheet

MAX98357A/MAX98357B
PCM Input Class D Audio Power Amplifiers
6Maxim Integrated
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 5V, V
GND
= 0V, GAIN = V
DD
. BCLK = 3.072MHz, LRCLK = 48kHz, speaker loads (Z
SPK
) connected between OUTP and
OUTN, Z
SPK
= J, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25NC.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
AUDIO MODE FIR LOWPASS FILTER (30kHz < LRCLK < 50kHz)
Passband Cutoff f
PLP
Ripple limit cutoff
0.43
x f
S
Hz-3dB cutoff
0.47
x f
S
-6.02dB cutoff
0.5
x f
S
Stopband Cutoff
f
SLP
0.58
x f
S
Hz
Stopband Attenuation f > f
SLP
60 dB
AUDIO MODE FIR LOWPASS FILTER (LRCLK > 50kHz)
Passband Cutoff f
PLP
Ripple limit cutoff
0.24
x f
S
Hz
-3dB cutoff
0.31
x f
S
Stopband Cutoff f
SLP
0.477
x f
S
Hz
Stopband Attenuation f < f
SLP
60 dB
DIGITAL AUDIO INTERFACE
LRCLK Range 1 f
S1
7.6 8 8.4
kHz
LRCLK Range 2 f
S2
15.2 16 16.8
LRCLK Range 3 f
S3
30.4 48 50.4
LRCLK Range 4 f
S4
83.8 96 100.8
Resolution
I
2
S/left justified mode 16/24/32
Bits
TDM mode 16/32
BCLK Frequency Range f
BCLKH
BCLK must be 32, 48, or 64X of LRCLK 0.2432 25.804 MHz
BCLK High Time t
BCLKH
15 ns
BCLK Low Time t
BCLKL
15 ns
Maximum Low Frequency
BCLK and LRCLK Jitter
RMS jitter below 40kHz 0.5
ns
Maximum High Frequency
BCLK and LRCLK Jitter
RMS jitter above 40kHz 12
Input High Voltage V
IH
Digital audio inputs 1.3 V