Mono Class Amplifier Industry-Leading Quiescent Current: 1.6mA 1.
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19-4806; 8/09
Mono Class Amplifier
Industry-Leading Quiescent Current: 1.6mA 1.2mA 3.6V Spread Spectrum Active Emissions Limiting Passes Limit Unfiltered with 24in (61cm) Speaker Cable High 94dB PSRR 217Hz Click-and-Pop Suppression Thermal Overcurrent Protection 0.5µA Current Shutdown Mode Space-Saving, 0.8mm, 8-Pin TDFN Package
MAX9830
MAX9830 mono Class amplifier provides Class audio performance with Class efficiency. Active emissions limiting edge rate overshoot control circuitry greatly reduces EMI. patented filterless spread-spectrum modulation scheme eliminates need output filtering found traditional Class devices. These features reduce application component count. MAX9830's industry-leading 1.6mA 1.2mA 3.6V, quiescent current extends battery life portable applications. MAX9830 available 8-pin TDFN (2mm 0.8mm) specified over extended -40°C +85°C temperature range.
Applications
Notebook Netbook Computers Cellular Phones Players Portable Audio Players VoIP Phones
PART MAX9830AETA+
Ordering Information
TEMP RANGE -40°C +85°C PIN-PACKAGE TDFN-EP*
+Denotes lead(Pb)-free/RoHS-compliant package. Exposed pad.
Configuration
VIEW
PVDD OUT+ OUT- PGND
Typical Operating Circuit
+2.6V +5.5V 0.47µF PVDD 0.1µF
MAX9830
0.47µF
MAX9830
OUT+
SHDN OUTN.C. PGND
SHDN N.C.
TDFN 0.8mm
EXPOSED PAD. CONNECT PGND ENHANCE THERMAL DISSIPATION.
Maxim Integrated Products
pricing, delivery, ordering information, please contact Maxim Direct 1-888-629-4642, visit Maxim's website www.maxim-ic.com.
Mono Class Amplifier MAX9830
ABSOLUTE MAXIMUM RATINGS
Voltage PVDD, IN+, IN-, SHDN, PGND .-0.3V OUT+, OUT- PGND .-0.3V 0.3V Current Continuous Current Into/Out PVDD, PGND, OUT+, OUT- .±600mA Continuous Input Current (all other pins) .±20mA Duration Short Circuit Between OUT+, OUT-, PVDD, PGND .Continuous Continuous Power Dissipation Multilayer Board +70°C) 8-Pin TDFN-EP (derate 11.9mW/°C) .953.5mW Junction Temperature .+150°C Operating Temperature Range .-40°C +85°C Storage Temperature Range .-65°C +150°C Lead Temperature (soldering, 10s) .+300°C Rate Voltage Rise PVDD .1V/µs
Stresses beyond those listed under "Absolute Maximum Ratings" cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated operational sections specifications implied. Exposure absolute maximum rating conditions extended periods affect device reliability.
ELECTRICAL CHARACTERISTICS
(VPVDD VSHDN VPGND unless otherwise specified. connected between OUT+ OUT-, measurement bandwidth 20Hz 22kHz, TMIN TMAX, unless otherwise noted. Typical values +25°C.) (Notes
PARAMETER SPEAKER AMPLIFIER Voltage Range Quiescent Supply Current Shutdown Supply Current Turn-On Time Bias Voltage Maximum Input Voltage Input Resistance Shutdown Input Resistance Voltage Gain Common-Mode Rejection Ratio Power-Supply Rejection Ratio PVDD ISHDN VBIAS RINSD CMRR PSRR 1kHz, input referred VPVDD 2.6V 5.5V, +25°C PVDDRIPPLE 200mVP-P (Note THD+N 10%, 1kHz 1kHz +25°C Peak voltage, A-weighted, samples/sec (Notes Into shutdown shutdown fRIPPLE 217Hz fRIPPLE 20kHz POUT 0.5W POUT Output Offset Voltage Single ended Differential Between inputs From inputs PGND Inferred from PSRR test VPVDD 5.0V VPVDD 3.6V VSHDN =+25°C 1.31 85.6 64.3 2.25 0.04 0.04 VRMS SYMBOL CONDITIONS UNITS
Output Power Total Harmonic Distortion Plus Noise
POUT
THD+N
Click-and-Pop Level
Mono Class Amplifier
ELECTRICAL CHARACTERISTICS (continued)
(VDD VSHDN VGND unless otherwise specified. connected between OUT+ OUT-, measurement bandwidth 20Hz 22kHz, TMIN TMAX, unless otherwise noted. Typical values +25°C.) (Notes
PARAMETER Oscillator Frequency Spread-Spectrum Bandwidth Noise Signal-to-Noise Ratio Output Current Limit Thermal Shutdown Level Thermal Shutdown Hysterysis Efficiency DIGITAL INPUT (SHDN) Input Voltage High Input Voltage Input Leakage Current +25°C POUT 1.5W ILIM A-weighted (Note POUT POUT THD+N, A-weighted +25°C SYMBOL fOSC CONDITIONS +180 UNITS µVRMS
MAX9830
Note devices 100% production tested +25°C. temperature limits guaranteed design. Note Testing performed with resistive load series with inductor simulate actual speaker load. 33µH. 68µH. Note Amplifier inputs AC-coupled PGND with 0.47µF. Note Specified room temperature with resistive load series with 68µH inductive load connected across outputs. Mode transitions controlled SHDN.
Mono Class Amplifier MAX9830
Typical Operating Characteristics
(VPVDD VSHDN 5.0V, VPGND unless otherwise specified. connected between OUT+ OUT-, measurement bandwidth 20Hz 22kHz, +25°C, unless otherwise noted.)
TOTAL HARMONIC DISTORTION PLUS NOISE FREQUENCY
MAX9830 toc01
TOTAL HARMONIC DISTORTION PLUS NOISE FREQUENCY
MAX9830 toc02
TOTAL HARMONIC DISTORTION PLUS NOISE FREQUENCY
VPVDD 5.0V RLOAD
MAX9830 toc03
VPVDD 5.0V RLOAD
VPVDD 3.6V RLOAD
THD+N THD+N POUT 400mW
THD+N POUT 100mW
POUT 100mW
POUT 1.4W 0.01 FREQUENCY (Hz) 100k 0.01
POUT 600mW 0.01 FREQUENCY (Hz) 100k
POUT FREQUENCY (Hz) 100k
TOTAL HARMONIC DISTORTION PLUS NOISE FREQUENCY
MAX9830 toc04
TOTAL HARMONIC DISTORTION PLUS NOISE OUTPUT POWER
MAX9830 toc05
TOTAL HARMONIC DISTORTION PLUS NOISE OUTPUT POWER
VPVDD 3.6V RLOAD
MAX9830 toc06
VPVDD 3.6V RLOAD
VPVDD 5.0V RLOAD
THD+N THD+N POUT 100mW
6kHz THD+N 1kHz
1kHz 6kHz
POUT 500mW 0.01 FREQUENCY (Hz) 100k 0.01
100Hz 0.01
100Hz
OUTPUT POWER
OUTPUT POWER
TOTAL HARMONIC DISTORTION PLUS NOISE OUTPUT POWER
MAX9830 toc07
TOTAL HARMONIC DISTORTION PLUS NOISE OUTPUT POWER
MAX9830 toc08
OUTPUT POWER LOAD RESISTANCE
VPVDD 5.0V OUTPUT POWER
MAX9830 toc09
VPVDD 5.0V RLOAD
VPVDD 3.6V RLOAD
THD+N THD+N 6kHz 1kHz
6kHz 1kHz
THD+N
100Hz 0.01 OUTPUT POWER 0.01 OUTPUT POWER 100Hz
THD+N
LOAD RESISTANCE
Mono Class Amplifier
Typical Operating Characteristics (continued)
(VPVDD VSHDN 5.0V, VPGND unless otherwise specified. connected between OUT+ OUT-, measurement bandwidth 20Hz 22kHz, +25°C, unless otherwise noted.)
OUTPUT POWER LOAD RESISTANCE
MAX9830 toc10
MAX9830
EFFICIENCY OUTPUT POWER
VPVDD 5.0V EFFICIENCY RLOAD
MAX9830 toc11
EFFICIENCY OUTPUT POWER
VPVDD 3.6V EFFICIENCY RLOAD
MAX9830 toc12
OUTPUT POWER
VPVDD 3.6V
THD+N LOAD RESISTANCE THD+N
RLOAD
RLOAD
OUTPUT POWER
OUTPUT POWER
POWER-SUPPLY REJECTION RATIO FREQUENCY
MAX9830 toc13
COMMON-MODE REJECTION RATIO FREQUENCY
INPUT REFERRED CMRR (dB)
MAX9830 toc14
VRIPPLE 200mVP-P PSRR (dB) -100 -120 FREQUENCY (Hz)
100k
FREQUENCY (Hz)
100k
AMPLITUDE FREQUENCY
MAX9830 toc15
STARTUP WAVEFORM
MAX9830 toc16
FREQUENCY (Hz)
SHDN 2V/div
AMPLITUDE (dB)
OUTPUT 500mA/div
100k
400Fs/div
Mono Class Amplifier MAX9830
Typical Operating Characteristics (continued)
(VPVDD VSHDN 5.0V, VPGND unless otherwise specified. connected between OUT+ OUT-, measurement bandwidth 20Hz 22kHz, +25°C, unless otherwise noted.)
SHUTDOWN WAVEFORM
MAX9830 toc17
WIDEBAND OUTPUT SPECTRUM
100Hz OUTPUT AMPLITUDE (dBV) SHDN 2V/div -100 -120
MAX9830 toc18
OUTPUT 500mA/div
400Fs/div
1000
FREQUENCY (MHz)
OUTPUT FREQUENCY SPECTRUM
MAX9830 toc19
SUPPLY CURRENT SUPPLY VOLTAGE
MAX9830 toc20
OUTPUT MAGNITUDE (dBV) -100 -120 -140
SUPPLY CURRENT (mA)
FREQUENCY (kHz) SUPPLY VOLTAGE
SHUTDOWN CURRENT SUPPLY VOLTAGE
MAX9830 toc21
IMMUNITY FREQUENCY
IMMUNITY (dBV)
MAX9830 toc22
SUPPLY CURRENT (FA)
1000 1500 2000 2500 3000 SUPPLY VOLTAGE FREQUENCY (MHz)
Mono Class Amplifier
Description
NAME INSHDN N.C. PGND OUTOUT+ PVDD Noninverting Audio Input Inverting Audio Input Active-Low Shutdown Input. Drive SHDN place device shutdown mode. Connection. Leave unconnected. Ground Negative Speaker Output Positive Speaker Output Power Supply. Bypass PVDD PGND with 0.1µF capacitor. Exposed Pad. Connect exposed solid ground plane. FUNCTION
MAX9830
Detailed Description
MAX9830 features industry-leading quiescent current, low-power shutdown mode, comprehensive clickand-pop suppression, excellent immunity. MAX9830 offers Class audio performance with Class efficiency minimal board-space solution. Class amplifier features spread-spectrum modulation combined with edge rate overshoot control circuitry that offers significant improvements switchmode amplifier radiated emissions. MAX9830 includes thermal overload short-circuit protection.
AMPLITUDE (dBuV/m) FREQUENCY (MHz) EN55022B LIMIT
Figure with 24in Speaker Cable
Class Speaker Amplifier
MAX9830 filterless Class amplifier offers much higher efficiency than Class amplifiers. high efficiency Class amplifier switching operation output stage transistors. power loss associated with Class output stage mostly loss MOSFET on-resistance quiescent current overhead.
frequency ±10kHz around center frequency (600kHz). Above 10MHz, wideband spectrum looks like noise purposes (Figure
Ultra-Low Filterless Output Stage Traditional Class amplifiers require external filters, shielding, meet EN55022B electromagnetic-interference (EMI) regulation standards. Maxim's patented active emissions limiting edge-rate control circuitry spread-spectrum modulation reduces emissions, while maintaining efficiency. Maxim's patented spread-spectrum modulation mode flattens wideband spectral components, while proprietary techniques ensure that cycle-to-cycle variation switching period does degrade audio reproduction efficiency. MAX9830's spreadspectrum modulator randomly varies switching
Speaker Current Limit output current speaker amplifier exceeds current limit (1.8A typ), MAX9830 disables outputs approximately 400µs. 400µs, outputs re-enabled. fault condition still exists, MAX9830 continues disable re-enable outputs until fault condition removed.
Shutdown
MAX9830 features low-power shutdown mode, drawing 0.5µA supply current. Drive SHDN MAX9830 into shutdown.
Click-and-Pop Suppression
MAX9830 speaker amplifier features Maxim's comprehensive click-and-pop suppression. During startup, click-and-pop suppression circuitry reduces audible transient sources internal device. When entering shutdown, differential speaker outputs ramp down quickly simultaneously.
Mono Class Amplifier MAX9830
Applications Information
Filterless Class Operation
Traditional Class amplifiers require output filter. filter adds cost, size, decreases efficiency THD+N performance. MAX9830's filterless modulation scheme does require output filter. Because switching frequency MAX9830 well beyond bandwidth most speakers, voice coil movement switching frequency very small. speaker with series inductance 10µH. Typical speakers exhibit series inductances 20µH 100µH range.
Input Filtering input-coupling capacitor (CIN), conjunction with amplifier's internal input resistance (RIN), forms highpass filter that removes bias from incoming signal. These capacitors allow amplifier bias signal optimum level. Select 0.47µF capacitors optimum click-and-pop performance 17Hz f-3dB. different -3dB required, assuming zerosource-impedance,
[µF] -3dB
Component Selection
Optional Ferrite Bead Filter Although normally needed, applications where speaker leads exceed 24in VPVDD filter constructed from inexpensive ferrite bead small-value capacitor ground (Figure provide additional suppression. ferrite bead with resistance, high frequency 1MHz) impedance 600, rated least capacitor value varies based ferrite bead chosen actual speaker lead length. Select capacitor value based performance. Speaker Amplifier Power Supply Input (PVDD) PVDD powers speaker amplifier. PVDD ranges from 2.6V 5.5V. Bypass PVDD with 0.1µF capacitor PGND. Apply additional bulk capacitance device long input traces between PVDD power source used. Ensure rate voltage rise PVDD limited 1V/µs.
capacitors with adequately voltage-coefficient best low-frequency performance.
Layout Grounding
Proper layout grounding essential optimum performance. Good grounding improves audio performance prevents switching noise from coupling into audio signal. wide, low-resistance output traces. load impedance decreases, current drawn from device outputs increase. higher current, resistance output traces decrease power delivered load. example, delivered from speaker output load through 100m trace, 49mW consumed trace. power delivered through trace, only consumed trace. Wide output, supply ground traces also improve power dissipation device. MAX9830 inherently designed excellent immunity. best performance, ground fills around signal traces bottom planes. MAX9830 TDFN package features exposed thermal underside. This lowers package's thermal resistance providing heat conduction path from PCB. Connect exposed thermal ground plane using large multiple vias.
OUT+
MAX9830
OUT-
Chip Information
PROCESS: CMOS
Figure Optional Ferrite Bead Filter
Mono Class Amplifier
Functional Diagram
2.6V 5.5V FERRITE BEAD
MAX9830
10µF*
0.1µF
PVDD UVLO/POWER MANAGEMENT
SHDN CLICK-AND-POP SUPPRESSION PVDD
LOW-EMI DRIVER 0.47µF CLASS MODULATOR INPGND PVDD
OUT+ OUT-
0.47µF
LOW-EMI DRIVER
MAX9830
PGND
PGND *BULK CAPACITOR
Mono Class Amplifier MAX9830
Package Information
latest package outline information land patterns, www.maxim-ic.com/packages. PACKAGE TYPE TDFN-EP PACKAGE CODE T822+2 DOCUMENT 21-0168
PACKAGE OUTLINE TDFN EXPOSED PAD, 2x2x0.80mm
21-0168
TDFN EXPOSED PADS.EPS
Mono Class Amplifier
Package Information (continued)
latest package outline information land patterns, www.maxim-ic.com/packages.
MAX9830
COMMON DIMENSIONS SYMBOL MIN. 0.70 1.90 1.90 0.00 0.20 MAX. 0.80 2.10 2.10 0.05 0.40
0.25 MIN. 0.20 REF.
PACKAGE VARIATIONS PKG. CODE T822-1 T822-2 0.70±0.10 0.80±0.10 1.30±0.10 1.20±0.10 0.50 TYP. 0.50 TYP. 0.25±0.05 0.25±0.05 0.125 0.125 [(N/2)-1] 1.50 1.50
PACKAGE OUTLINE TDFN EXPOSED PAD, 2x2x0.80mm
21-0168
Maxim cannot assume responsibility circuitry other than circuitry entirely embodied Maxim product. circuit patent licenses implied. Maxim reserves right change circuitry specifications without notice time.
Maxim Integrated Products, Gabriel Drive, Sunnyvale, 94086 408-737-7600
2009 Maxim Integrated Products Maxim registered trademark Maxim Integrated Products, Inc.
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