MAXIM MAX98400A, MAX98400B Technical data
19-5286; Rev 0; 6/10
EVALUATION KIT
AVAILABLE
Stereo, High-Power, Class D Amplifiers
General Description
The MAX98400A/MAX98400B Class D amplifiers provide
high-performance, thermally efficient amplifier solutions. The
MAX98400A delivers 2x20W into 8I loads or 1x40W into a
4I load. The MAX98400B delivers 2x12W into 8I loads.
An integrated limiting circuit prevents output clipping
distortion, protects small speakers from transient voltages, and reduces power dissipation.
A thermal-foldback feature can be enabled to automatically reduce the output power at above a junction temperature of +120NC. Traditional thermal protection is also
available in addition to robust overcurrent protection.
The ICs operate from a single 8V to 28V supply and
provide a high 67dB PSRR, eliminating the need for a
regulated power supply. They offer up to 90% efficiency
from a 12V supply.
Filterless modulation allows the ICs to pass EN55022B
EMI limits with 1m cables using only a low-cost ferrite
bead and small-value capacitor on each output.
Both devices feature eight digitally controlled gain settings.
Comprehensive click-and-pop reduction circuitry minimizes noise coming into and out of shutdown.
The MAX98400A/MAX98400B are available in 36-pin
and 24-pin TQFN packages, respectively, and are specified over the -40NC to +85NC temperature range.
MAX98400A/MAX98400B
Features
S Wide 8V to 28V Supply Voltage Range
S Single-Supply Operation
S Low EMI: Active Emissions Limiting
S Clipping Limiter
S Low Quiescent Current
S Thermal Foldback
S Thermal and Overcurrent Protection
Applications
LCD/PDP Televisions
LCD Monitors
MP3 Docking Stations
Notebook PCs
Ordering Information
PART PIN-PACKAGE SPEC
MAX98400AETX+ 36 TQFN-EP* 2x20W
MAX98400BETG+ 24 TQFN-EP* 2x12W
Note: Devices operate over the -40°C to +85°C temperature
range.
*EP = Exposed pad.
Simplified Block Diagram
INL-
CLIPPING
INL+
INR-
INR+
_______________________________________________________________ Maxim Integrated Products 1
LIMITER
CLIPPING
LIMITER
*MAX98400A ONLY
PGA
MAX98400A/B
PGA
CLASS D
MODULATOR
AND H-BRIDGE
CLASS D
MODULATOR
AND H-BRIDGE
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
OUTL-
OUTL+
MONO*
OUTR-
OUTR+
Stereo, High-Power, Class D Amplifiers
Table of ConTenTs
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Typical Operating Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Pin Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Stereo Configuration for MAX98400A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Mono Configuration for MAX98400A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Detailed Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Efficiency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Click-and-Pop Suppression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Mono Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Clipping Limiter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Limiter Threshold Control (LIM_TH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Release Time Control (RELEASE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Preamplifier Gain Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
MAX98400A/MAX98400B
Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Thermal Foldback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Overtemperature Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Overcurrent Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Applications Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Filterless Class D Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Inductor-Based Output Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Component Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Input Capacitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Power Supplies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Internal Regulator V
Supply Bypassing, Layout, and Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Chip Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Functional Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Package Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2
Stereo, High-Power, Class D Amplifiers
lisT of figures
Figure 1. MAX98400B EMI Performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 2. MAX98400A Efficiency vs. Class AB Effifciency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 3. Limiter Control, Mode3 Configuration (Table 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 4. Output Filter for PWM Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
lisT of Tables
Table 1. Limiter Control Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 2. Gain Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 3. Filter Component Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
MAX98400A/MAX98400B
3
Stereo, High-Power, Class D Amplifiers
ABSOLUTE MAXIMUM RATINGS
PVDD to PGND ......................................................-0.3V to +30V
V
to GND ...............................................................-0.3V to +6V
S
SHDN, MONO to GND ............................................-0.3V to +6V
IN_ to GND ..............................................................-0.3V to +6V
G1, G2, RELEASE, TEMPLOCK,
LIM_TH to GND ........................................-0.3V to (V
OUT_ to PGND ......................................-0.3V to (V
PVDD
+ 0.3V)
S
+ 0.3V)
PGND to GND ......................................................-0.3V to +0.3V
Continuous Current into OUT_ .......................................... +2.4A
Continuous Current into PVDD, PGND ............................. +4.8A
Continuous Current into All Other Pins ........................... +10mA
Duration of OUT_ Short Circuit to PVDD or PGND ...Continuous
Duration of Short Circuit Between
OUT_+ and OUT_- .................................................Continuous
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.maxim-ic.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
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.
Continuous Power Dissipation (T
= +70NC)
A
36-Pin TQFN Multilayer Board
(derate 35.7mW/NC above +70NC) .........................2857.1mW
B
B
(Note 1) .............................................................28NC/W
JA
(Note 1) ...............................................................1NC/W
JC
24-Pin TQFN Multilayer Board
(derate 27.8mW/NC above +70NC) .............................35.7mW
B
B
(Note 1) .............................................................36NC/W
JA
(Note 1) ...............................................................3NC/W
JC
Junction Temperature .....................................................+150NC
Operating Temperature Range .......................... -40NC to +85NC
Storage Temperature Range ............................ -65NC to +150NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
MAX98400A/MAX98400B
ELECTRICAL CHARACTERISTICS
(V
= 18V, CIN = 1FF, V
PVDD
= 1FF, C1 = C2 = 1FF, R
otherwise noted. Typical values are at T
= 5V, LIM_TH = VS, TEMPLOCK = unconnected; G1 = GND, G2 = open (gain = 20.1dB), C
SHDN
= J, AC measurement bandwidth 20Hz to 20kHz, differential input signal, TA = T
L
= +25NC.) (Notes 2, 3)
A
MIN
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
AMPLIFIER DC CHARACTERISTICS
PVDD Supply Voltage Range V
Supply Input Voltage V
V
S
Quiescent Current
Single-Supply
Quiescent Current
I
Shutdown Current
SHDN_PVDD
I
SHDN_VS
PVDD Undervoltage Lockout V
Regulator Output Voltage V
V
S
PVDD
I
PVDD
I
VS
I
PVDD
UVLO
S
S
Inferred from PVDD_PSRR 8 28 V
Inferred from IVS test 4.75 5.5 V
Dual-supply mode:
V
= 4.75V, TA = +25NC
S
Single-supply mode:
T
= +25NC
A
= 8I (Note 3)
R
L
V
= 0V, TA = +25NC,
SHDN
V
= 5.5V
S
10 15
6 8.2
16 23
17
8 20
3 10
7 7.9 V
4.2 4.47 4.75 V
INPUT STAGE
Differential Input Voltage Range 2 V
Single-Ended Input Voltage
Range
Common-Mode Rejection Ratio CMRR 60 dB
Input Resistance Differential V
= 0V, gain = +35dB 20 32
LIM_TH
to T
MAX
1 V
REL
, unless
mA
mA
FA
RMS
RMS
kI
4
Stereo, High-Power, Class D Amplifiers
ELECTRICAL CHARACTERISTICS (continued)
(V
= 18V, CIN = 1FF, V
PVDD
= 1FF, C1 = C2 = 1FF, R
otherwise noted. Typical values are at T
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
POWER STAGE
Shutdown to Full Operation t
Gain Accuracy
Left-to-Right Gain Matching All gain settings
Crosstalk
Output Offset Voltage V
Click-and-Pop Level K
PVDD Power-Supply Rejection
Ratio
V
Power-Supply Rejection Ratio PSRR
S
MAX98400A Output Power P
MAX98400B Output Power P
Total Harmonic Distortion Plus
Noise
Output Noise V
Efficiency
Current Limit I
Output FET Resistance R
Switching Frequency f
Peak Output Voltage V
LIMITER
Attack Time V
Release Time V
Maximum Trigger Level V
Minimum Trigger Level (Note 7) -6 dBFS
Trigger Level V
Compression Range V
= 5V, LIM_TH = VS, TEMPLOCK = unconnected; G1 = GND, G2 = open (gain = 20.1dB), C
SHDN
= J, AC measurement bandwidth 20Hz to 20kHz, differential input signal, TA = T
L
= +25NC.) (Notes 2, 3)
A
SON
Q0.8 Q4
1kHz -85
10kHz -68
TA = +25NC Q8 Q45
Peak voltage,
32 samples/s,
A-weighted,
T
= +25NC (Notes 4, 5)
A
V
= 8V to 28V 52 63
PVDD
ripple 67
P-P
10kHz, 100mV
ripple 57
P-P
Into
shutdown
Out of
shutdown
-47
-56
PSRR
OS
CP
PVDD
VS = 4.75V to 5.5V 39 55
VS
OUT
OUT
THD+N
N
E
LIM
DSON
SW
10kHz, 100mV
Stereo, RL = 8I, 10% THD+N,
f
= 1kHz (Note 3)
IN
Mono, R
f
L
= 1kHz (Note 3)
IN
Stereo, RL = 8I, 10% THD+N,
f
= 1kHz (Note 3)
IN
P
= 0.1W to P
OUT
20kHz, R
/2, fIN = 1kHz, RL = 8I
P
OUT
A-weighted 100
= 2x20W, RL = 8I (MAX98400A)
P
OUT
f
= 1kHz (Note 3)
IN
= 28V 20 26 V
PVDD
= 0V 240 500
LIM_TH
= 0V 0.8 s
LIM_TH
= 14V (Note 6) 4 dBFS
PVDD
= 0V -1 0 +1 dBFS
LIM_TH
= 0V -12 dB
LIM_TH
ripple 50
P-P
ripple 40
P-P
= 4I, 10% THD+N,
/2, fIN = 20Hz to
OUT
= 8I
L
22
44
15
0.3
0.03
90 %
3.5 5 A
0.4
265 330 395 kHz
to T
MIN
11 ms
Q2
MAX
, unless
FV
%
%
dB
mV
dBV
dB1kHz, 100mV
dB1kHz, 100mV
W
%
RMS
I
Fs
MAX98400A/MAX98400B
REL
5
Stereo, High-Power, Class D Amplifiers
ELECTRICAL CHARACTERISTICS (continued)
(V
= 18V, CIN = 1FF, V
PVDD
= 1FF, C1 = C2 = 1FF, R
otherwise noted. Typical values are at T
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
VGA Distortion Compression = 0 to -12dB 3.5 %
LIM_TH Input-Voltage Low
(PVDD Tracking)
LIM_TH Input-Voltage High
(Limiter Off)
Channel-to-Channel Attenuation
Tracking
THERMAL FOLDBACK
Internal Templock Resistor 120 205 310
Trigger Temperature +130
Hard Thermal Protection +165
LOGIC INPUT (G1, G2)
Sink Current
Source Current
MAX98400A/MAX98400B
Input High Threshold
Input Low Threshold
Input Three-State Window
LOGIC INPUT (SHDN, MONO (MAX98400A Only))
Input Leakage Current I
Input High Threshold V
Input Low Threshold V
Input-Voltage Hysteresis 100 mV
Note 2: 100% production tested at T
Note 3: The MAX98400A stereo mode is specified with an 8I resistive load in series with a 68FH inductive load connected across
BTL outputs. The MAX98400A mono mode is specified with a 4I resistive load in series with 33FH inductive load. The
MAX98400B is specified with an 8I resistive load in series with a 68FH inductive load connected across BTL outputs.
Note 4: Amplifier inputs AC-coupled to GND.
Note 5: Mode transitions controlled by SHDN.
Note 6: Relative to equivalent full-scale undistorted output. Full scale (FS) = V
Note 7: Relative to equivalent full-scale undistorted output. Full scale (FS) = V
= 5V, LIM_TH = VS, TEMPLOCK = unconnected; G1 = GND, G2 = open (gain = 20.1dB), C
SHDN
= J, AC measurement bandwidth 20Hz to 20kHz, differential input signal, TA = T
L
= +25NC.) (Notes 2, 3)
A
0.15 V
Q1
= +25NC, VG1, VG2 = 0V
T
A
TA = +25NC, VG1, VG2 = V
IN
INH
INL
= +25NC. Specifications over temperature limits are guaranteed by design.
A
TA = +25NC Q10 FA
S
PVDD
PVDD
x 0.95.
.
+2.5 +5 +8
-8 -5 -2.5
0.3 x
V
S
0.45 x
V
0.5 x
V
S
2 V
S
to T
MIN
V
S
- 1
0.8 x
V
S
0.55 x
V
S
0.4 V
MAX
REL
, unless
V
dB
kI
NC
NC
FA
FA
V
V
V
6
Stereo, High-Power, Class D Amplifiers
Typical Operating Characteristics
(MAX98400A, V
C
= C1 = C2 = 1FF, typical values are at TA = +25NC, unless otherwise noted.)
REL
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
1
PVDD
= 18V, V
= 5V, LIM_TH = VS, TEMPLOCK = unconnected; G1 = GND, G2 = open (gain = 20.1dB), CIN =
SHDN
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
1
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
1
MAX98400A/MAX98400B
P
= 4W
0.1
THD+N (%)
0.01
0.001
0.01 100
OUT
P
OUT
FREQUENCY (kHz)
= 0.5W
V
PVDD
8I LOAD
1010.1
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
10
1
0.1
THD+N (%)
0.01
0.001
f = 1kHz
f = 100Hz
0 12
f = 6kHz
OUTPUT POWER (W)
V
PVDD
8I LOAD
= 12V
= 12V
108642
MAX98400 toc01
MAX98400 toc04
0.1
P
= 7W
OUT
THD+N (%)
0.01
P
= 1W
OUT
V
PVDD
0.001
0.01 100
FREQUENCY (kHz)
4I LOAD
1010.1
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
10
1
0.1
THD+N (%)
0.01
0.001
f = 1kHz
0 24
f = 6kHz
f = 100Hz
OUTPUT POWER (W)
V
PVDD
I LOAD
8
= 12V
= 18V
20161284
MAX98400 toc02
MAX98400 toc05
0.1
P
= 10W
THD+N (%)
0.01
0.001
0.01 100
OUT
P
= 1W
OUT
FREQUENCY (kHz)
V
PVDD
8I LOAD
1010.1
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
10
1
f = 6kHz
0.1
THD+N (%)
0.01
0.001
f = 1kHz
V
= 24V
PVDD
RL = 8I
STOPS BEFORE 10% THD+N
f = 100Hz
0 48
DUE TO THERMAL LIMITING OF
THERMAL FOLDBACK FEATURE
OUTPUT POWER (W)
MAX98400 toc03
= 18V
MAX98400 toc06
403224168
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
10
1
0.1
THD+N (%)
0.01
0.001
f = 6kHz
f = 1kHz
f = 100Hz
OUTPUT POWER (W)
V
PVDD
4I LOAD
14121086420 18
= 12V
16
MAX98400 toc07
EFFICIENCY vs. OUTPUT POWER
100
90
80
70
60
50
40
EFFICIENCY (%)
30
20
10
0
0 20
V
= 12V,
PVDD
8I LOAD,
BOTH CHANNELS DRIVEN
TOTAL OUTPUT POWER (W)
EFFICIENCY vs. OUTPUT POWER
100
90
MAX98400 toc08
80
70
60
50
40
EFFICIENCY (%)
30
20
10
0
181612 144 6 8 102
V
= 18V,
PVDD
8I LOAD,
BOTH CHANNELS DRIVEN
TOTAL OUTPUT POWER (W)
3020 2510 1550 40
MAX98400 toc09
35
7
Stereo, High-Power, Class D Amplifiers
Typical Operating Characteristics (continued)
(MAX98400A, V
C
= C1 = C2 = 1FF, typical values are at TA = +25NC, unless otherwise noted.)
REL
EFFICIENCY vs. OUTPUT POWER
100
90
80
70
60
50
40
EFFICIENCY (%)
30
20
10
0
= 18V, V
PVDD
V
8I LOAD,
BOTH CHANNELS DRIVEN
TOTAL OUTPUT POWER (W)
= 24V,
PVDD
403020100 60
SHDN
= 5V, LIM_TH = VS, TEMPLOCK = unconnected; G1 = GND, G2 = open (gain = 20.1dB), CIN =
MAXIMUM OUTPUT POWER vs. SUPPLY VOLTAGE
EFFICIENCY vs. OUTPUT POWER
100
90
MAX98400 toc10
80
70
60
50
40
EFFICIENCY (%)
30
20
10
0
50
V
= 12V,
PVDD
4I LOAD,
BOTH CHANNELS DRIVEN
20100 40
TOTAL OUTPUT POWER (W)
30
100
MAX98400 toc11
MAXIMUM OUTPUT POWER (W)
(WITH THERMAL SHUTDOWN)
8I LOAD, BOTH
90
CHANNELS ARE DRIVEN
80
70
60
50
40
10% THD+N
30
20
10
0
8 28
1% THD+N
24201612
SUPPLY VOLTAGE (V)
MAX98400 toc12
MAXIMUM OUTPUT POWER vs. SUPPLY VOLTAGE
(WITH THERMAL SHUTDOWN)
MAX98400 toc13
(W)
P
OUT
40
35
30
25
20
15
10
60
MAX98400A/MAX98400B
4I LOAD, BOTH CHANNELS ARE DRIVEN
50
40
30
10% THD+N
20
MAXIMUM OUTPUT POWER (W)
10
0
8 16
1% THD+N
SUPPLY VOLTAGE (V)
141210
OUTPUT POWER vs. LOAD
MAX98400 toc16
10
-10
-20
-30
-40
PSRR (dB)
-50
-60
-70
-80
80
70
60
50
(W)
40
OUT
P
30
20
1% THD+N
10
0
0 100
10% THD+N
LOAD (I)
V
PVDD
= 24V
908010 20 30 50 6040 70
OUTPUT POWER vs. LOAD
10% THD+N
5
1% THD+N
0
0 100
POWER-SUPPLY REJECTION RATIO
0
0.01 100
LOAD (I)
100mV
FREQUENCY (kHz)
V
PVDD
P-P
1010.1
= 12V
908010 20 30 50 6040 70
RIPPLE
MAX98400 toc14
MAX98400 toc17
50
45
40
35
30
(W)
25
OUT
P
20
15
10
1% THD+N
5
0
0 100
10% THD+N
LOAD (I)
CROSSTALK vs. FREQUENCY
20
8I LOAD,
P
= 1W,
OUT
0
f = 1kHz
-20
-40
CROSSTALK (dB)
-60
-80
OUTPUT POWER vs. LOAD
-100
1
FREQUENCY (kHz)
V
PVDD
100.10.01
= 18V
MAX98400 toc15
908060 7020 30 40 5010
MAX98400 toc18
100
8
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