Click here for production status of specific part numbers. MAX9700 1.2W, Low-EMI, Filterless, Class D Audio Amplifier General Description Features The MAX9700 mono class D audio power amplifier Filterless Amplifier Passes FCC Radiated provides class AB amplifier performance with class D Emissions Standards with 100mm of Cable efficiency, conserving board space and extending battery Unique Spread-Spectrum Mode Offers 5dB life. Using a class D architecture, the MAX9700 Emissions Improvement Over Conventional Methods delivers 1.2W into an 8 load while offering efficiencies Optional External SYNC Input above 90%. A low-EMI modulation scheme renders the Simple Master-Slave Setup for Stereo Operation traditional class D output filter unnecessary. 94% Efficiency The MAX9700 offers two modulation schemes: a fixed- 1.2W into 8 frequency (FFM) mode, and a spread-spectrum (SSM) Low 0.01% THD+N mode that reduces EMI-radiated emissions due to the High PSRR (72dB at 217Hz) modulation frequency. Furthermore, the MAX9700 oscillator Integrated Click-and-Pop Suppression can be synchronized to an external clock through the Low Quiescent Current (4mA) SYNC input, allowing the switching frequency to be user Low-Power Shutdown Mode (0.1A) defined. The SYNC input also allows multiple MAX9700s Short-Circuit and Thermal-Overload Protection to be cascaded and frequency locked, minimizing Available in Thermally Efficient, Space-Saving interference due to clock intermodulation. The device Packages utilizes a fully differential architecture, a full-bridged 10-Pin TDFN (3mm x 3mm x 0.8mm) output, and comprehensive click-and-pop suppression. 10-Pin MAX The gain of the MAX9700 is set internally (MAX9700A: 12-Bump UCSP (1.5mm x 2mm x 0.6mm) 6dB, MAX9700B: 12dB, MAX9700C: 15.6dB, MAX9700D: Ordering Information 20dB), further reducing external component count. The MAX9700 features high 72dB PSRR, a low 0.01% PIN- TOP PART TEMP RANGE THD+N, and SNR in excess of 90dB. Short-circuit and PACKAGE MARK thermal-overload protection prevent the device from MAX9700AETB+ -40C to +85C 10 TDFN-EP* ACM damage during a fault condition. The MAX9700 is available MAX9700AEUB+ -40C to +85C 10 MAX in 10-pin TDFN (3mm x 3mm x 0.8mm), 10-pin MAX , MAX9700AEBC+T -40C to +85C 12 UCSP and 12-bump UCSP (1.5mm x 2mm x 0.6mm) packages. MAX9700BETB+ -40C to +85C 10 TDFN-EP* ACI The MAX9700 is specified over the extended -40C to MAX9700BEUB+ -40C to +85C 10 MAX +85C temperature range. MAX9700BEBC+T -40C to +85C 12 UCSP Applications *EP = Exposed pad. Ordering Information continued and Selector Guide appears Cellular Phones MP3 Players at end of data sheet. PDAs Portable Audio Block Diagram Pin Configurations V TOP VIEW DD V 1 10 PV DD DD IN+ 2 9 OUT- DIFFERENTIAL MODULATOR MAX9700 AUDIO INPUT AND H-BRIDGE IN- 3 8 OUT+ GND 4 7 PGND SYNC SHDN 5 6 SYNC OSCILLATOR INPUT MAX9700 TDFN/MAX Pin Configurations continued at end of data sheet. UCSP is a trademark of Maxim Integrated Products, Inc. MAX is a registered trademark of Maxim Integrated Products, Inc. 19-3030 Rev 3 3/18MAX9700 1.2W, Low-EMI, Filterless, Class D Audio Amplifier Absolute Maximum Ratings V to GND ............................................................................6V Continuous Power Dissipation (T = +70C) DD A PV to PGND ........................................................................6V 10-Pin TDFN (derate 24.4mW/C above +70C) ...1951.2mW DD GND to PGND ......................................................-0.3V to +0.3V 10-Pin MAX (derate 5.6mW/oC above +70C) ......444.4mW All Other Pins to GND .............................. -0.3V to (V + 0.3V) 12-Bump UCSP (derate 6.1mW/C above +70C) ......484mW DD Continuous Current Into/Out of PV /PGND/OUT ......600mA Junction Temperature ......................................................+150C DD Continuous Input Current (all other pins) .........................20mA Operating Temperature Range ........................... -40C to +85C Duration of OUT Short Circuit to GND or PV .....Continuous Storage Temperature Range ............................ -65C to +150C DD Duration of Short Circuit Between OUT+ and OUT- ....Continuous Lead Temperature (soldering, 10s) .................................+300C Bump Temperature (soldering) Reflow ..........................................................................+235C 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 = PV = V = 3.3V, V = V = 0V, SYNC = GND (FFM), R = 8, R connected between OUT+ and OUT-, DD DD SHDN GND PGND L L T = T to T , unless otherwise noted. Typical values are at T = +25C.) (Notes 1, 2) A MIN MAX A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS GENERAL Supply Voltage Range V Inferred from PSRR test 2.5 5.5 V DD Quiescent Current I 4 5.2 mA DD Shutdown Current I 0.1 10 A SHDN Turn-On Time t 30 ms ON Input Resistance R T = +25C 12 20 k IN A Input Bias Voltage V Either input 0.73 0.83 0.93 V BIAS MAX9700A 6 MAX9700B 12 Voltage Gain A dB V MAX9700C 15.6 MAX9700D 20 T = +25C 11 80 A Output Offset Voltage V mV OS T T T 120 MIN A MAX Common-Mode Rejection Ratio CMRR f = 1kHz, input referred 72 dB IN V = 2.5V to 5.5V, T = +25C 50 70 DD A Power-Supply Rejection Ratio PSRR f = 217Hz 72 dB RIPPLE (Note 3) 200mV ripple P-P f = 20kHz 55 RIPPLE R = 8 450 L Output Power P THD+N = 1% mW OUT R = 6 800 L R = 8, L 0.01 P = 125mW Total Harmonic Distortion f = 1kHz, either OUT IN THD+N % Plus Noise FFM or SSM R = 6, L 0.01 P = 125mW OUT Maxim Integrated 2 www.maximintegrated.com