MAX4411 19-2618 Rev 2 9/06 80mW, Fixed-Gain, DirectDrive, Stereo Headphone Amplifier with Shutdown General Description Features The MAX4411 fixed-gain, stereo headphone amplifier is No Bulky DC-Blocking Capacitors Required designed for portable equipment where board space is Fixed -1.5V/V Gain Eliminates External Feedback at a premium. The MAX4411 uses a unique DirectDrive Network architecture to produce a ground-referenced output MAX4411: -1.5V/V from a single supply, eliminating the need for large DC- MAX4411B: -2V/V blocking capacitors, saving cost, board space, and Ground-Referenced Outputs Eliminate DC-Bias component height. Additionally, the gain of the Voltages on Headphone Ground Pin amplifier is set internally (-1.5V/V, MAX4411 and No Degradation of Low-Frequency Response Due -2V/V, MAX4411B), further reducing component count. to Output Capacitors The MAX4411 delivers up to 80mW per channel into a 80mW per Channel into 16 16 load and has low 0.003% THD+N. An 86dB at Low 0.003% THD+N 217Hz power-supply rejection ratio (PSRR) allows this device to operate from noisy digital supplies without an High PSRR (86dB at 217Hz) additional linear regulator. The MAX4411 includes 8kV Integrated Click-and-Pop Suppression ESD protection on the headphone outputs. Com- 1.8V to 3.6V Single-Supply Operation prehensive click-and-pop circuitry suppresses audible Low Quiescent Current (5mA) clicks and pops on startup and shutdown. Independent Independent Left/Right, Low-Power left/right, low-power shutdown controls make it possible Shutdown Controls to optimize power savings in mixed-mode, mono/stereo applications. Short-Circuit and Thermal-Overload Protection The MAX4411 operates from a single 1.8V to 3.6V supply, 8kV ESD-Protected Amplifier Outputs consumes only 5mA of supply current, has short-circuit Available in Space-Saving Packages and thermal-overload protection, and is specified over the 16-Bump UCSP (2mm 2mm 0.6mm) extended -40C to +85C temperature range. The 20-Pin Thin QFN (4mm 4mm 0.8mm) MAX4411 is available in a tiny (2mm 2mm 0.6mm), 16-bump chip-scale package (UCSP) and a 20-pin thin Ordering Information QFN package (4mm 4mm 0.8mm). PIN/BUMP- GAIN PART TEMP RANGE PACKAGE (V/V) Applications MAX4411EBE-T -40C to +85C 16 UCSP-16 -1.5 Notebook PCs MP3 Players MAX4411EBE+T -40C to +85C 16 UCSP-16 -1.5 Cellular Phones Smart Phones MAX4411ETP -40C to +85C 20 Thin QFN -1.5 PDAs Portable Audio Equipment Ordering Information continued at end of data sheet. +Denotes lead-free package. UCSP is a trademark of Maxim Integrated Products, Inc. Functional Diagram DirectDrive OUTPUTS LEFT AUDIO ELIMINATE DC-BLOCKING CAPACITORS INPUT SHDNL SHDNR MAX4411 RIGHT FIXED GAIN ELIMINATES AUDIO EXTERNAL RESISTOR INPUT NETWORK Pin Configurations and Typical Application Circuit appear at end of data sheet. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE80mW, Fixed-Gain, DirectDrive, Stereo Headphone Amplifier with Shutdown ABSOLUTE MAXIMUM RATINGS PGND to SGND .....................................................-0.3V to +0.3V Output Short Circuit to GND or V ...........................Continuous DD PV to SV -0.3V to +0.3V Continuous Power Dissipation (T = +70C) DD DD ................................................................. A PV to SV .........................................................-0.3V to +0.3V 16-Bump UCSP (derate 7.4mW/C above +70C)........589mW SS SS PV and SV to PGND or SGND .........................-0.3V to +4V 20-Pin Thin QFN (derate 16.9mW/C above +70C) ..1349mW DD DD PV and SV to PGND or SGND ..........................-4V to +0.3V Junction Temperature......................................................+150C SS SS IN to SGND ................................(SV - 0.3V) to (SV + 0.3V) Operating Temperature Range ...........................-40C to +85C SS DD SHDN to SGND........................(SGND - 0.3V) to (SV + 0.3V) Storage Temperature Range .............................-65C to +150C DD OUT to SGND .............................(SV - 0.3V) to (SV +0.3V) Bump Temperature (soldering) SS DD C1P to PGND.............................(PGND - 0.3V) to (PV + 0.3V) Reflow ..........................................................................+230C DD C1N to PGND .............................(PV - 0.3V) to (PGND + 0.3V) Lead Temperature (soldering, 10s) .................................+300C SS 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 (PV = SV = 3V, PGND = SGND = 0V, SHDNL = SHDNR = SV , C1 = C2 = 2.2F, C = 1F, R = , T = T to T , DD DD DD IN L A MIN MAX unless otherwise noted. Typical values are at T = +25C.) (Note 1) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage Range V Guaranteed by PSRR test 1.8 3.6 V DD One channel enabled 3.2 Quiescent Supply Current I mA DD Two channels enabled 5 8.4 Shutdown Supply Current I SHDNL = SHDNR = GND 6 10 A SHDN 0.7 x V IH SV DD SHDN Thresholds V 0.3 x V IL SV DD SHDN Input Leakage Current -1 +1 A SHDN to Full Operation t 175 s SON CHARGE PUMP Oscillator Frequency f 272 320 368 kHz OSC AMPLIFIERS MAX4411 -1.55 -1.5 -1.45 Voltage Gain A V/V V MAX4411B -2.1 -2 -1.9 Gain Match A 1% V MAX4411 0.7 2.8 Total Output Offset Voltage V Input AC-coupled mV OS MAX4411B 0.75 3.0 Input Resistance R 10 14 19 k IN 1.8V V 3.6V, DD DC (Note 2) 72 86 MAX4411 Power-Supply Rejection Ratio PSRR f = 217Hz 86 dB RIPPLE V = 3.0V, 200mV DD P-P ripple, MAX4411 f = 1kHz 75 RIPPLE (Note 3) f = 20kHz 53 RIPPLE 2 MAX4411