Datasheet

MAX98357A/MAX98357B
PCM Input Class D Audio Power Amplifiers
7Maxim 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)
Note 2: 100% production tested at T
A
= +25NC. Specifications over temperature limits are guaranteed by design.
Note 3: Class D amplifier testing performed with a resistive load in series with an inductor to simulate an actual speaker load. For
R
L
= 8I, L
L
= 68FH. For R
L
= 4I, L
L
= 33FH.
Note 4: Digital silence used for input signal.
Note 5: Dynamic range measured using the EIAJ method. -60dBFS 1kHz output signal, A-weighted, and normalized to 0dBFS.
f =20Hz to 20kHz.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Low Voltage V
IL
Digital audio inputs 0.6 V
Input Leakage Current I
IH
, I
IL
V
IN
= 0V, V
DD
= 5.5V, T
A
= +25NC
-1 +1
FA
Input Capacitance C
IN
3 pF
DIN to BCLK Setup Time t
SETUP
10 ns
LRCLK to BCLK Setup Time t
SYNCSET
10 ns
DIN to BCLK Hold Time t
HOLD
10 ns
LRCLK to BCLK Hold Time t
SYNCHOLD
10 ns
SD_MODE COMPARATOR TRIP POINTS
B0
See SD_MODE and shutdown operation
for details
0.08 0.16 0.355
VB1 0.65 0.77 0.825
B2 1.245 1.4 1.5
SD_MODE Pulldown Resistor
R
PD
92 100 108
kI
GAIN_SLOT COMPARATOR TRIP POINTS
V_GAIN_
SLOT
A
V
= 3dB gain
0.65 x
V
DD
0.85 x
V
DD
V
A
V
= 6dB gain
0.9 x
V
DD
V
DD
A
V
= 9dB gain
0.4 x
V
DD
0.6 x
V
DD
A
V
= 12dB gain 0
0.1 x
V
DD
A
V
= 15dB gain
0.15 x
V
DD
0.35 x
V
DD