Datasheet

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MAX98307/MAX98308
3.3W Mono Class DG Multilevel Audio Amplifier
Note 2: 100% production tested at T
A
= +25°C. Specifications over temperature limits are guaranteed by design.
Note 3: Testing performed with a resistive load in series with an inductor to simulate an actual speaker. For R
L
= 8I, L = 68FH.
Note 4: Amplifier inputs AC-coupled to GND.
Note 5: Specified at room temperature with an 8I resistive load in series with a 68FH inductive load connected across the BTL
outputs. Mode transitions controlled by SHDN active-low shutdown control.
ELECTRICAL CHARACTERISTICS (continued)
V
PVDD
= V
CC
= V
SHDN
= 3.6V, V
PGND
= V
GND
= 0V, Z
L
= 8I + 68FH between OUT+ and OUT-, (MAX98307 R
IN+
= R
IN-
= 10kI,
R
FB+
= R
FB-
= 20kI), C
IN+
= C
IN-
= 0.33FF, A
V
= 14.5dB, AC measurement bandwidth 20Hz to 20kHz, T
A
= T
MIN
to T
MAX
, unless
otherwise noted. Typical values are at T
A
= +25NC.) (Notes 2, 3)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Total Harmonic Distortion Plus
Noise
THD+N f
IN
= 1kHz, P
OUT
= 1W 0.05 %
Output Offset Voltage V
OS
T
A
= +25°C
±1 ±5 mV
Click-and-Pop Level K
CP
Peak voltage,
A-weighted,
32 samples per
second (Notes 4, 5)
Into shutdown -65
dBV
Out of shutdown -65
Output Switching Frequency 340 kHz
Efficiency η
f
IN
= 1kHz, P
OUT
at 500mW,
THD+N = 0.02%
84
%
f
IN
= 1kHz, P
OUT
at 1W, THD+N = 0.05% 82
Current Limit I
LIM
2 A
RMS
Output Noise V
N
A-weighted 52 µV
RMS
LOGIC INPUT (SHDN)
Input Voltage High V
IH
1.4 V
Input Voltage Low V
IL
0.4 V
Input Leakage Current
T
A
= +25NC
±10 µA