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MAX98300ETA+ -MAX98300EWL+T
Mono 2W Class D Amplifier
Mono 2.6W Class D Amplifier
MAX98300
EVALUATION KIT AVAILABLE General Description
The MAX98300 mono 2.6W Class D amplifier provides
Class AB audio performance with Class D efficiency.
This device offers five selectable gain settings (0dB,
3dB, 6dB, 9dB, and 12dB) set by a single gain-select
input (GAIN).
Active emissions-limiting edge-rate and overshoot con-
trol circuitry greatly reduces EMI. A patented filterless
spread-spectrum modulation scheme eliminates the need
for output filtering found in traditional Class D devices.
These features reduce application component count.
The MAX98300 industry-leading 0.78mA at 3.7V (1.1mA
at 5V) quiescent current extends battery life in portable
applications.
The MAX98300 is available in an 8-pin TDFN-EP (2mm
x 2mm x 0.8mm) and a 9-bump (1.2mm x 1.2mm) WLP.
Both packages are specified over the extended -40NC to
+85NC temperature range.
Applications
Notebook and Netbook Computers
Cellular Phones
MP3 Players
Portable Audio Players
VoIP Phones
FeaturesIndustry-Leading Quiescent Current: 0.78mA at
3.7V, 1.1mA at 5VSpread Spectrum and Active Emissions LimitingFive Selectable GainsClick-and-Pop SuppressionThermal and Overcurrent ProtectionLow-Current Shutdown ModeSpace-Saving Packages 2mm x 2mm x 0.8mm, 8-Pin TDFN-EP 1.2mm x 1.2mm, 9-Bump WLP (0.4mm Pitch)
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Ordering Information
Typical Application Circuit
PARTTEMP RANGEPIN-PACKAGE
MAX98300ETA+-40NC to +85NC8 TDFN-EP*
MAX98300EWL+-40NC to +85NC9 WLP
1µF
0.1µF
1µF
+2.6V TO +5.5V
IN+
*SYSTEM BULK CAPACITANCE
IN-
PVDD
+2.6V TO +5.5V
PGND
SHDN
GAIN
MAX98300
10µF*
OUT+
OUT-
Mono 2.6W Class D Amplifier
MAX98300
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 (VPVDD + 0.3V)
Continuous Current Into/Out of PVDD, PGND, OUT_ ...Q600mA
Continuous Input Current (all other pins) ........................Q20mA
Duration of Short Circuit Between
OUT_ and PVDD, PGND .......................................ContinuousOUT+ and OUT- ....................................................Continuous
Continuous Power Dissipation (TA = +70NC) for Multilayer BoardTDFN-EP (derate 11.9mW/NC) ..................................953.5mWWLP (derate 12mW/NC) ............................................963.8mW
Junction Temperature .....................................................+150NC
Operating Temperature Range ..........................-40NC to +85NC
Storage Temperature Range ............................-65NC to +150NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
ELECTRICAL CHARACTERISTICS
(VPVDD = VSHDN = 5.0V, VPGND = 0V, AV = 12dB (GAIN = PVDD), RL = J, RL connected between OUT+ to OUT-, AC measurement
bandwidth 20Hz to 22kHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25NC.) (Notes 1, 2)
ABSOLUTE MAXIMUM RATINGS
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
AMPLIFIER CHARACTERISTICS
Speaker Supply Voltage RangePVDDInferred from PSRR test2.65.5V
Quiescent Supply CurrentIDDVPVDD = 5.0V1.12.0mAVPVDD = 3.7V0.78
Shutdown Supply CurrentISHDNVSHDN = 0V, TA = +25NC< 0.110FA
Turn-On TimetON3.710ms
Bias VoltageVBIAS1.3V
Maximum AC Input Voltage SwingVINDifferential2.0VRMSSingle ended1.0
Input ResistanceRINTA = +25°C
AV = 12dB1020
AV = 9dB1020
AV = 6dB1020
AV = 3dB1528
AV = 0dB2640
Voltage GainAV
Connect GAIN to PVDD11.51212.5
Connect GAIN to PVDD
through 100kI ±5%8.599.5
GAIN unconnected5.566.5
Connect GAIN to PGND
through 100kI ±5%2.533.5
Connect GAIN to PGND-0.50+0.5
Output Offset VoltageVOSTA = +25°C (Note 3)Q1Q 3mV
Click and PopKCP
Peak voltage,
A-weighted, 32
samples per second,
RL = 8I (Notes 3, 4)
Into shutdown-66
dBVOut of shutdown-66
Common-Mode Rejection RatioCMRRfIN = 1kHz, input referred50dB
Mono 2.6W Class D Amplifier
MAX98300
ELECTRICAL CHARACTERISTICS (continued)
(VPVDD = VSHDN = 5.0V, VPGND = 0V, AV = 12dB (GAIN = PVDD), RL = J, RL connected between OUT+ to OUT-, AC measurement
bandwidth 20Hz to 22kHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25NC.) (Notes 1, 2)
Note 1: All devices are 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 RL = 4I,
L = 33FH. For RL = 8I, L = 68FH.
Note 3: Amplifier inputs AC-coupled to ground.
Note 4: Mode transitions controlled by SHDN.
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Power-Supply Rejection Ratio
(Note 3)PSRR
VPVDD = 2.6V to 5.5V, TA = +25NC5070VRIPPLE = 200mVP-P f = 217Hz67
f = 20kHz63
Output PowerPOUT
fIN = 1kHz, RL = 4ITHD+N = 1%2.1
THD+N = 10%2.6
fIN = 1kHz, RL = 8I
THD+N = 1%1.35
THD+N = 10%1.65
THD+N = 1%,
VPVDD = 3.7V0.71
THD+N = 10%,
VPVDD = 3.7V0.89
Total Harmonic Distortion Plus
NoiseTHD+NfIN = 1kHz
RL = 4I
POUT = 1W0.05%
RL = 8I
POUT = 0.5W0.04%
Oscillator FrequencyfOSC300kHz
Spread-Spectrum Bandwidth±10kHz
EfficiencyEPOUT = 1.3W, RL = 8I89%
NoiseVNAV = 0dB, A-weighted (Note 3)36FVRMS
Output Current LimitILIM2A
Thermal Shutdown Level+160NC
Thermal Shutdown Hysteresis20NC
DIGITAL INPUT (SHDN)
Input-Voltage HighVINH1.4V
Input-Voltage LowVINL0.4V
Input Leakage CurrentTA = +25NCQ10FA
Mono 2.6W Class D Amplifier
MAX98300
Typical Operating Characteristics
(VPVDD = VSHDN = 5.0V, VPGND = 0V, AV = 12dB, RL = J, unless otherwise specified, RL connected between OUT+ to OUT-, AC
measurement bandwidth 20Hz to 22kHz, TA = +25NC, unless otherwise noted.)
THD+N vs. FREQUENCY
MAX98300 toc04
FREQUENCY (kHz)
THD+N (%)10.1
POUT = 100mW
POUT = 600mW
RL = 8I + 68FH
VPVDD = 3.7V
THD+N vs. OUTPUT POWER
MAX98300 toc07
THD+N (%)
fIN = 6kHz
fIN = 1kHz
fIN = 100Hz
RL = 8I + 68FH
VPVDD = 5.0V
THD+N vs. FREQUENCY
MAX98300 toc01
FREQUENCY (kHz)
THD+N (%)10.1
POUT = 1.2W
POUT = 400mW
RL = 4I + 33FH
VPVDD = 5.0V
THD+N vs. OUTPUT POWER
MAX98300 toc05
OUTPUT POWER (W)
THD+N (%)
fIN = 6kHz
RL = 4I + 33µH
VPVDD = 5.0V
fIN = 1kHz
fIN = 100Hz
THD+N vs. OUTPUT POWER
MAX98300 toc08
THD+N (%)
fIN = 6kHz
fIN = 1kHz
fIN = 100Hz
RL = 8I + 68FH
VPVDD = 3.7V
THD+N vs. FREQUENCY
MAX98300 toc02
FREQUENCY (kHz)
THD+N (%)10.1
POUT = 800mW
POUT = 200mW
RL = 4I + 33FH
VPVDD = 3.7V
THD+N vs. OUTPUT POWER
MAX98300 toc06
OUTPUT POWER (W)
THD+N (%)
fIN = 1kHz
fIN = 6kHz
RL = 4I + 33µH
VPVDD = 3.7V
fIN = 100Hz
EFFICIENCY vs. OUTPUT POWER
MAX98300 toc09
EFFICIENCY (%)
VPVDD = 5.0V
RL = 8I + 68FH
RL = 4I + 33FH
THD+N vs. FREQUENCY
MAX98300 toc03
FREQUENCY (kHz)
THD+N (%)10.1
POUT = 1.2W
POUT = 150mW
RL = 8I + 68FH
VPVDD = 5.0V
Mono 2.6W Class D Amplifier
MAX98300
Typical Operating Characteristics (continued)
(VPVDD = VSHDN = 5.0V, VPGND = 0V, AV = 12dB, RL = J, unless otherwise specified, RL connected between OUT+ to OUT-, AC
measurement bandwidth 20Hz to 22kHz, TA = +25NC, unless otherwise noted.)
EFFICIENCY vs. OUTPUT POWER
MAX98300 toc10
OUTPUT POWER (W)
EFFICIENCY (%)
VPVDD = 3.7V
RL = 8I + 68FH
RL = 4I + 33FH
OUTPUT POWER vs. SUPPLY VOLTAGE
MAX98300 toc13
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)
RL = 4I + 33FH
10% THD+N
1% THD+N
COMMON-MODE REJECTION RATION vs.
FREQUENCY
MAX98300 toc16
CMRR (dB)10.1
INPUT REFERRED
OUTPUT POWER vs.
LOAD RESISTANCE
MAX98300 toc11
LOAD RESITANCE (I)
OUTPUT POWER (W)
PVDD = 5V
10% THD+N
1% THD+N
OUTPUT POWER vs. SUPPLY VOLTAGE
MAX98300 toc14
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)
RL = 8I + 68FH
10% THD+N
1% THD+N
OUTPUT POWER vs.
LOAD RESISTANCE
MAX98300 toc12
LOAD RESITANCE (I)
OUTPUT POWER (W)
PVDD = 3.7V
10% THD+N
1% THD+N
POWER-SUPPLY REJECTION RATIO vs.
FREQUENCY
MAX98300 toc15
FREQUENCY (kHz)
PSRR (dB)10.1
VRIPPLE = 200mVP-P
VPVDD = 5.0V
GAIN vs. FREQUENCY
MAX98300 toc17
AMPLITUDE (dB)10.1
AV = 12dB
AV = 9dB
AV = 6dB
AV = 3dB
AV = 0dB
Mono 2.6W Class D Amplifier
MAX98300
Typical Operating Characteristics (continued)
(VPVDD = VSHDN = 5.0V, VPGND = 0V, AV = 12dB, RL = J, unless otherwise specified, RL connected between OUT+ to OUT-, AC
measurement bandwidth 20Hz to 22kHz, TA = +25NC, unless otherwise noted.)
MAX98300 toc18
1ms/div
OUT_
SHDN
SHUTDOWN WAVEFORM
MAX98300 toc19
1ms/div
OUT_
SHDN
STARTUP WAVEFORM
WIDEBAND OUTPUT SPECTRUM
MAX98300 toc20
FREQUENCY (MHz)
OUTPUT MAGNITUDE (dBV)
RBW = 30Hz
INBAND OUTPUT SPECTRUM
MAX98300 toc21
FREQUENCY (kHz)
OUTPUT MAGNITUDE (dBV)10.1
f = 1kHz
VOUT = -60dBV
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX98300 toc23
SUPPLY CURRENT (nA)
RL = ∞
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX98300 toc22
SUPPLY CURRENT (mA)
RL = ∞
Mono 2.6W Class D Amplifier
MAX98300
Pin Description
Pin Configurations
PINNAMEFUNCTIONTDFN-EPWLPA3IN+Noninverting Audio Input B3IN-Inverting Audio InputC2SHDNActive-Low Shutdown Input. Drive SHDN low to place the device in shutdown mode.C3GAINGain Selection. See Table 1 for gain settings.A2PGNDPower GroundC1OUT-Negative Speaker OutputB1OUT+Positive Speaker OutputA1PVDDPower Supply. Bypass PVDD to PGND with 0.1FF and 10FF capacitors.B2N.C.No Connection—EPExposed Pad (TDFN only). Connect exposed pad to a solid ground plane.
EP*
PVDDOUT-PGND
MAX98300
MAX98300
OUT+
IN+SHDNGAININ-
TDFN(2mm x 2mm)
TOP VIEW
(BUMP SIDE DOWN)13
WLP
(1.2mm x 1.2mm,
0.4mm pitch)PVDDPGNDIN+
OUT+N.C.IN-
OUT-SHDNGAIN
*EP = EXPOSED PAD. CONNECT EP TO PGND
TO ENHANCE THERMAL DISSIPATION
