MAX97200 19-4981 Rev 3 8/12 Low-Power, Low-Offset, Dual Mode, Class H DirectDrive Headphone Amplifier General Description Features S Second-Generation DirectDrive Technology The MAX97200 is a 45mW Class H headphone amplifier that runs from a single low 1.8V supply voltage and employs S Dynamic, Class H, Dual Mode Charge Pump Maxims second-generation DirectDrive technology. S Low Voltage Operation, V = 1.8V PVIN The MAX97200 features a Dual ModeK internal charge S Low Quiescent Current, 1.15mA (typ) at V = PVIN pump to generate the power rails for the amplifier. The 1.8V charge-pump output can be QPVIN/2 or QPVIN depend- S Eliminates Large Output DC-Blocking Capacitors ing on the amplitude of the output signal. When the out- put voltage is low, the power-supply voltage is QPVIN/2. S Industry-Leading Click-and-Pop Performance When the output signal demands larger output voltage, S High-Fidelity, SNR 105dB (5.6V Output Noise) the charge pump switches modes so that a greater S Output Power 34mW into 32I (THD+N 1%) power-supply voltage is realized and more output power S Output Power 45mW into 16I (THD+N 10%) can be delivered to the load. S Tiny, 12-Bump, 1.27mm x 1.65mm (0.4mm Lead Second-generation DirectDrive technology improves Pitch) WLP Package power consumption when compared to first-generation DirectDrive amplifiers. The MAX97200 can be powered Ordering Information/ from a regulated 1.8V and have similar power consump- tion to a traditional DirectDrive amplifier that is powered Selector Guide from 0.9V. GAIN PIN- TOP PART Maxims DirectDrive architecture uses an inverting (dB) PACKAGE MARK charge pump to derive a negative voltage supply. The MAX97200AEWC+ 3 12 WLP ABF headphone amplifier is powered between the positive MAX97200BEWC+ 0 12 WLP ABG supply and the generated negative rail. This scheme allows the audio output signal to be biased about Note: All devices operate over the -40C to +85C tempera- ground, eliminating the need for large DC-blocking ture range. capacitors between the amplifier output and the head- +Denotes a lead(Pb)-free and RoHS-compliant package. phone load. Low-output offset voltage provides very good click-and- pop performance both into and out of shutdown. High signal-to-noise ratio maintains system fidelity. Typical Operating Circuit The MAX97200 is available in a tiny, 12-bump wafer level packaging (WLP 1.27mm x 1.65mm) with a small, 0.4mm lead pitch and specified over the -40NC to +85NC MAX97200 extended temperature range. LEFT AUDIO INPUT LEFT AUDIO OUTPUT Applications APPLICATIONS SHDN Cellular Phones PROCESSOR RIGHT AUDIO INPUT Smartphones RIGHT AUDIO OUTPUT MP3 Players CHARGE VoIP Phones PUMP DirectDrive is a registered trademark of Maxim Integrated Products, Inc. Dual Mode is a trademark of Maxim Integrated Products, Inc. For pricing, delivery, and ordering information, please contact Maxim Direct 1 at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLELow-Power, Low-Offset, Dual Mode, Class H DirectDrive Headphone Amplifier ABSOLUTE MAXIMUM RATINGS PVIN or PVDD to PGND .......................................-0.3V to +2.2V Continuous Power Dissipation (T = +70NC) A GND to PGND ......................................................-0.3V to +0.3V 12-Bump WLP (derate 13.7mW/NC above +70NC) ....1095mW PVSS to PGND .....................................................-2.2V to +0.3V Junction Temperature .................................................+150NC OUT and IN to GND ............. (PVSS - 0.2V) to (PVDD + 0.2V) Operating Temperature Range .......................... -40NC to +85NC C1P, C1N ...................................................Cap connection only Storage Temperature Range ............................ -65NC to +150NC SHDN to GND .........................................................-0.3V to +4V Soldering Temperature (reflow) ......................................+260NC Output Short-Circuit Current .....................................Continuous Thermal Limits (Note 1) Multiple Layer PCB Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional opera- tion 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. PACKAGE THERMAL CHARACTERISTICS (Note 1) Junction-to-Ambient Thermal Resistance (B ) ..............73NC/W JA Junction-to-Case Thermal Resistance (B ) ..................30NC/W CA 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. ELECTRICAL CHARACTERISTICS (V = 1.8V, V = V = 0V, V = 1.8V, C1 = C2 = C3 = 1FF, C4 = 10FF, T = T to T , unless otherwise noted. PVIN PGND GND SHDN A MIN MAX Typical values are at T = +25NC.) (Note 2) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLY Supply Voltage Range PVIN Guaranteed by PSRR 1.62 1.80 1.98 V UVLO Rising 1.48 1.58 V UVLO Falling 1.36 1.46 V Inputs grounded, T = +25NC, no load 1.15 1.7 A Quiescent Supply Current I mA DD 16I load, inputs grounded, T = +25NC 1.16 A Shutdown Current I V = 0V, T = +25NC 0.2 FA SHDN SHDN A Turn-On Time t 0.6 1 ms ON CHARGE PUMP Oscillator Frequency f V = 0V, T = +25NC 78 83 88 kHz OSC1 OUT A Oscillator Frequency f V = 0.2V, R = J, f = 1kHz 665 kHz OSC2 OUT L IN Oscillator Frequency f V = 0.5V, R = J, f = 1kHz 500 kHz OSC3 OUT L IN V = 0.2V, R = J PVIN/2 OUT L Positive Output Voltage V V PVDD PVIN V = 0.5V, R = J OUT L V = 0.2V, R = J -PVIN/2 OUT L Negative Output Voltage V V PVSS V = 0.5V, R = J -PVIN OUT L R = J, output voltage at which the L QPVIN charge pump switches modes, V OUT Output Voltage Threshold V x V TH1 rising, transition from 1/8 to normal 0.08 frequency 2 MAX97200