Junction Temperature .....................................................+150NC
Operating Temperature Range .......................... -40NC to +85NC
Storage Temperature Range............................ -65NC to +150NC
Soldering Temperature (reflow) ......................................+260NC
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.
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)
PARAMETER
Supply Voltage Range
Undervoltage Lockout
Quiescent Supply Current
Shutdown Supply Current
Turn-On Time
Bias Voltage
SYMBOL
PVDD
UVLO
I
DD
I
SHDN
t
ON
V
BIAS
A
V
= 12dB
Input Resistance
R
IN
T
A
= +25°C,
single-ended
A
V
= 9dB
A
V
= 6dB
A
V
= 3dB
A
V
= 0dB
Connect GAIN to PGND
Connect GAIN to PGND
through 100kI
±5%
Voltage Gain
A
V
Connect GAIN to PVDD
Connect GAIN to PVDD
through 100kI
±5%
GAIN unconnected
Output Offset Voltage
V
OS
T
A
= +25°C (Note 3)
Into shutdown
Peak voltage,
A-weighted, 32
samples per second, Out of shutdown
R
L
= 8I (Notes 3, 4)
f
IN
= 1kHz, input referred
45
64
90
128
180
11.5
8.5
5.5
2.5
-0.5
PVDD falling
T
A
= +25NC
V
PVDD
= 3.7V
V
SHDN
= 0V, T
A
= +25NC
CONDITIONS
Inferred from PSRR test
MIN
2.5
1.5
1.8
1.2
0.95
< 0.1
3.4
V
PVDD
/2
70
100
140
200
280
12
9
6
3
0
Q1
-74
-60
80
dBV
12.5
9.5
6.5
3.5
+0.5
Q4.5
mV
dB
kI
10
10
TYP
MAX
5.5
2.2
1.8
UNITS
V
V
mA
FA
ms
V
Click and Pop
K
CP
Common-Mode Rejection Ratio
CMRR
dB
2
Maxim Integrated
MAX98304
Mono 3.2W Class D Amplifier
ELECTRICAL CHARACTERISTICS (continued)
(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)
PARAMETER
Power-Supply Rejection Ratio
(Note 3)
SYMBOL
CONDITIONS
V
PVDD
= 2.5V to 5.5V, T
A
= +25NC
PSRR
f = 217Hz
V
RIPPLE
= 200mV
P-P
THD+N = 10%,
f = 1kHz,
R
L
= 4I + 33FH
THD+N = 1%,
f = 1kHz,
R
L
= 4I + 33FH
THD+N = 10%,
f = 1kHz,
R
L
= 8I + 68FH
THD+N = 1%,
f = 1kHz,
R
L
= 8I + 68FH
Total Harmonic Distortion
Plus Noise
Oscillator Frequency
Spread-Spectrum Bandwidth
Efficiency
E
P
OUT
= 1.75W, R
L
= 8I
A
V
= 12dB
A
V
= 9dB
Noise
V
N
A-weighted (Note 3)
A
V
= 6dB
A
V
= 3dB
A
V
= 0dB
Output Current Limit
Thermal Shutdown Level
Thermal Shutdown Hysteresis
DIGITAL INPUT (SHDN)
Input-Voltage High
Input-Voltage Low
Input Leakage Current
V
INH
V
INL
V
PVDD
= 2.5V to 5.5V
V
PVDD
= 2.5V to 5.5V
T
A
= +25NC
1.4
0.4
Q1
I
LIM
f = 1kHz
f = 20kHz
V
PVDD
= 5.0V
V
PVDD
= 4.2V
V
PVDD
= 3.7V
V
PVDD
= 5.0V
V
PVDD
= 4.2V
V
PVDD
= 3.7V
V
PVDD
= 5.0V
V
PVDD
= 4.2V
V
PVDD
= 3.7V
V
PVDD
= 5.0V
V
PVDD
= 4.2V
V
PVDD
= 3.7V
R
L
= 4I
P
OUT
= 1W
R
L
= 8I
P
OUT
= 0.7W
MIN
72
TYP
90
80
84
84
3.2
2.2
1.7
2.6
1.8
1.4
1.8
1.2
0.96
1.4
1
0.8
0.03
0.03
300
±12.5
93
31
26
23
21
19
2.8
155
15
A
NC
NC
V
V
FA
FV
RMS
kHz
kHz
%
0.1
%
W
dB
MAX
UNITS
Output Power
P
OUT
THD+N
f
IN
= 1kHz
f
OSC
Note 1:
This device is 100% production tested at +25NC. All temperature limits are guaranteed by design.
Note 2:
Testing performed with a resistive load in series with an inductor to simulate an actual speaker load. For R
L
= 4I,
L = 33FH. For R
L
= 8I, L = 68FH.
Note 3:
Amplifier inputs AC-coupled to ground.
Note 4:
Mode transitions controlled by
SHDN.
Maxim Integrated
3
MAX98304
Mono 3.2W Class D Amplifier
Typical Operating Characteristics
(V
PVDD
= V
SHDN
= 5.0V, V
PGND
= 0V, A
V
= 6dB, R
L
=
J,
R
L
connected between OUT+ to OUT-, AC measurement bandwidth 20Hz
to 22kHz, T
A
= +25NC, unless otherwise noted.)
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX98304 toc01
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX98304 toc02
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
V
PVDD
= 3.7V
Z
LOAD
= 4I + 33µH
MAX98304 toc03
10
V
PVDD
= 5V
Z
LOAD
= 4I + 33µH
10
V
PVDD
= 4.2V
Z
LOAD
= 4I + 33µH
P
OUT
= 1W
10
1
THD+N (%)
P
OUT
= 2W
0.1
P
OUT
= 1.5W
1
THD+N (%)
1
THD+N (%)
0.1
0.1
P
OUT
= 0.8W
0.01
0.01
P
OUT
= 0.5W
0.01
P
OUT
= 0.2W
0.001
10
100
1k
FREQUENCY (Hz)
10k
100k
0.001
10
100
1k
FREQUENCY (Hz)
10k
100k
0.001
10
100
1k
FREQUENCY (Hz)
10k
100k
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX98304 toc04
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX98304 toc05
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
V
PVDD
= 3.7V
Z
LOAD
= 8I + 68µH
P
OUT
= 0.4W
P
OUT
= 0.2W
0.1
MAX98304 toc06
10
V
PVDD
= 5V
Z
LOAD
= 8I + 68µH
10
V
PVDD
= 4.2V
Z
LOAD
= 8I + 68µH
10
1
THD+N (%)
1
THD+N (%)
1
THD+N (%)
0.1
P
OUT
= 1.2W
0.1
P
OUT
= 0.6W
0.01
P
OUT
= 0.3W
0.01
P
OUT
= 0.2W
0.01
0.001
10
100
1k
FREQUENCY (Hz)
10k
100k
0.001
10
100
1k
FREQUENCY (Hz)
10k
100k
0.001
10
100
1k
FREQUENCY (Hz)
10k
100k
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX98304 toc07
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX98304 toc08
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
V
PVDD
= 3.7V
Z
LOAD
= 4I + 33µH
MAX98304 toc09
100
10
THD+N (%)
1
0.1
0.01
V
PVDD
= 5V
Z
LOAD
= 4I + 33µH
100
10
THD+N (%)
1
0.1
0.01
V
PVDD
= 4.2V
Z
LOAD
= 4I + 33µH
100
10
THD+N (%)
1
0.1
0.01
f = 6000Hz
f = 1000Hz
f = 6000Hz
f = 1000Hz
f = 6000Hz
f = 1000Hz
f = 100Hz
0.001
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
OUTPUT POWER (W)
0.001
0
0.5
1.0
f = 100Hz
0.001
1.5
2.0
2.5
0
0.5
f = 100Hz
1.0
OUTPUT POWER (W)
1.5
2.0
OUTPUT POWER (W)
4
Maxim Integrated
MAX98304
Mono 3.2W Class D Amplifier
Typical Operating Characteristics (continued)
(V
PVDD
= V
SHDN
= 5.0V, V
PGND
= 0V, A
V
= 6dB, R
L
=
J,
R
L
connected between OUT+ to OUT-, AC measurement bandwidth 20Hz
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