Datasheet
MAX98357A/MAX98357B
PCM Input Class D Audio Power Amplifiers
4Maxim Integrated
V
DD
, LRCLK, BCLK, and DIN to GND ....................-0.3V to +6V
All Other Pins to GND .............................. -0.3V to (V
DD
+ 0.3V)
Continuous Current In/Out of V
DD
/GND/OUT_ ................. Q1.6A
Continuous Input Current (all other pins) ........................ Q20mA
Duration of OUT_ Short Circuit to GND or V
DD
….. ...Continuous
Duration of OUTP Short to OUTN .............................Continuous
Continuous Power Dissipation (T
A
= +70NC)
WLP (derate 13.7mW/NC above +70NC)....................1096mW
TQFN (derate 20.8mW/NC above +70NC)..................1666mW
Junction Temperature .....................................................+150NC
Operating Temperature Range .......................... -40NC to +85NC
Storage Temperature Range ............................ -65NC to +150NC
Soldering Temperature (reflow) ......................................+230NC
WLP
Junction-to-Ambient Thermal Resistance (q
JA
) ..........73°C/W
Junction-to-Case Thermal Resistance (q
JC
) ...............50°C/W
TQFN
Junction-to-Ambient Thermal Resistance (q
JA
) ..........48°C/W
Junction-to-Case Thermal Resistance (q
JC
) .................7°C/W
ABSOLUTE MAXIMUM RATINGS
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
ELECTRICAL CHARACTERISTICS
(V
DD
= 5V, V
GND
= 0V, GAIN_SLOT = 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
Supply Voltage Range V
DD
Guaranteed by PSSR test 2.5 5.5 V
Undervoltage Lockout UVLO 1.4 1.8 2.3 V
Quiescent Current I
DD
T
A
= +25NC
2.75 3.35
mA
T
A
= +25NC, V
DD
= 3.7V
2.4 2.85
Shutdown Current
I
SHDN
SD_MODE = 0V, T
A
= +25NC
0.6 2
FA
Standby Current
I
STNDBY
SD_MODE = 1.8V, no BCLK, T
A
= +25NC
340 400
FA
Turn-On Time t
ON
7 7.5 ms
Output Offset Voltage V
OS
T
A
= +25NC, gain = 15dB Q0.3 Q2.5
mV
Click-and-Pop Level K
CP
Peak voltage, T
A
=
+25NC, A-weighted,
32 samples per
second (Note 3)
Into shutdown -72
dBV
Out of shutdown -66
Power-Supply Rejection Ratio PSRR
V
DD
= 2.5V to 5.5V, T
A
= +25NC
60 75
dB
T
A
= +25NC
(Notes 3, 4)
f = 217Hz,
200mV
P-P
ripple
77
f = 10kHz,
200mV
P-P
ripple
60