Datasheet

2 Maxim Integrated
Mono 3.2W Class D Amplifier
MAX98304
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation 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.
PVDD, IN+, IN-, SHDN, GAIN to PGND ..................-0.3V to +6V
All Other Pins to PGND
.........................-0.3V to (V
PVDD
+ 0.3V)
Continuous Current Into/Out of PVDD, PGND, OUT_
... Q750mA
Continuous Input Current (all other pins)
........................ Q20mA
Duration of Short Circuit Between
OUT_ and PVDD, PGND
.......................................Continuous
OUT+ and OUT- ....................................................Continuous
Continuous Power Dissipation (T
A
= +70NC) for Multilayer Board
9-Bump WLP (derate 10.6mW/NC) ..............................848mW
Junction Temperature
.....................................................+150NC
Operating Temperature Range
.......................... -40NC to +85NC
Storage Temperature Range
............................ -65NC to +150NC
Soldering Temperature (reflow)
......................................+260NC
ELECTRICAL CHARACTERISTICS
(V
PVDD
= V
SHDN
= 5.0V, V
PGND
= 0V, A
V
= 12dB (GAIN = PGND), R
L
= J, R
L
connected between OUT+ to OUT-, AC measurement
bandwidth 20Hz to 22kHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25NC.) (Notes 1, 2)
ABSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage Range PVDD Inferred from PSRR test 2.5 5.5 V
Undervoltage Lockout UVLO PVDD falling 1.5 1.8 2.2 V
Quiescent Supply Current I
DD
T
A
= +25NC
1.2 1.8
mA
V
PVDD
= 3.7V 0.95
Shutdown Supply Current I
SHDN
V
SHDN
= 0V, T
A
= +25NC
< 0.1 10
FA
Turn-On Time t
ON
3.4 10 ms
Bias Voltage V
BIAS
V
PVDD
/2
V
Input Resistance R
IN
T
A
= +25°C,
single-ended
A
V
= 12dB 45 70
kI
A
V
= 9dB 64 100
A
V
= 6dB 90 140
A
V
= 3dB 128 200
A
V
= 0dB 180 280
Voltage Gain A
V
Connect GAIN to PGND 11.5 12 12.5
dB
Connect GAIN to PGND
through 100kI ±5%
8.5 9 9.5
Connect GAIN to PVDD 5.5 6 6.5
Connect GAIN to PVDD
through 100kI ±5%
2.5 3 3.5
GAIN unconnected -0.5 0 +0.5
Output Offset Voltage
V
OS
T
A
= +25°C (Note 3)
Q1 Q4.5
mV
Click and Pop K
CP
Peak voltage,
A-weighted, 32
samples per second,
R
L
= 8I (Notes 3, 4)
Into shutdown -74
dBV
Out of shutdown -60
Common-Mode Rejection Ratio CMRR f
IN
= 1kHz, input referred 80 dB