MAX4298/MAX4299 19-1743 Rev 1 2/01 Ultra-High PSRR Stereo Drivers + Microphone Amp + 100mA Linear Regulator General Description Features The MAX4298 and MAX4299 are audio system ICs Audio System IC (MAX4299) designed for single +5V applications. The MAX4299 Ultra-High PSRR Stereo Headphone Driver features a stereo headphone driver, a microphone Ultra-High PSRR Microphone Amp amplifier, and a +3.3V linear regulator the MAX4298 100mA, 3.3V Linear Regulator features the stereo headphone driver only. The 93dB typ PSRR at 20kHz Operates Directly from MAX4298/ MAX4299 are designed specifically for harsh Noisy Digital Supplies digital environments where board space is at a premi- Clickless/Popless Power-Up, Power-Down, Mute um and the digital power supply is noisy. The design and Unmute uses innovative design techniques to achieve ultra-high power-supply rejection across the audio signal band PC99-Compliant Output Drivers: while, at the same time, delivering a high-current Rail- Better than 1V Output into 16 Load and RMS to-Rail output drive capability. The chip is designed to 1.5V and 0.0008% THD+N into 10k Load RMS drive highly capacitive loads that may be encountered PC99-Compliant Microphone Amplifier: when driving long cables to a remote load such as 0.005% THD+N into 10k Load desktop/notebook headphones or speakers. These 22nF Capacitive Load Drive Capability devices are fully compliant with PC99 standards. 4.5V to 5.5V Single-Supply Operation The amplifiers exhibit 115dB of DC power-supply rejec- tion and 80dB at 100kHz. The output amplifiers are Internally Generated Bias Voltage capable of driving a 1.5V signal into a 10k load RMS All Gains Externally Adjustable with 0.0008% THD+N. They can also drive 32 head- Available in Space-Saving Packages phones to 1.2V with 0.02% distortion. At +3.3V, the RMS 10-Pin MAX (MAX4298) linear regulator can output 100mA of current. The 16-Pin TSSOP (MAX4299) MAX4298 is available in a tiny 10-pin MAX while the MAX4299 is available in the space-saving 16-pin TSSOP package. Applications Ordering Information Notebook and Desktop Audio PART TEMP. RANGE PIN-PACKAGE Hands-Free Headsets MAX4298EUB -40C to +85C 10 MAX USB Audio Peripherals MAX4298ESD -40C to +85C 14 SO IP Telephones MAX4299EWP -40C to +85C 20 SO Wireless Internet Devices MAX4299EUE -40C to +85C 16 TSSOP MP3 Players/Recorders Typical Operating Circuit appears at end of data sheet. Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd. PSRR vs. Frequency Pin Configurations -50 TOP VIEW -60 -70 -80 OUT1 1 10 V CC -90 GND 2 9 OUT2 -100 MAX4298 IN1 3 8 IN2 -110 BIAS 4 7 C -120 BYPASS -130 SV 5 6 MUTE CC -140 -150 MAX 100 1k 10k 100k Pin Configurations continued at end of data sheet. FREQUENCY (Hz) Maxim Integrated Products 1 For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. PSRR (dB) MAX4298/9-13Ultra-High PSRR Stereo Drivers + Microphone Amp + 100mA Linear Regulator ABSOLUTE MAXIMUM RATINGS Supply Voltage (V ) to GND ...............................................+6V Continuous Power Dissipation CC Standby Supply Voltage (SV ) to GND...............................+6V 10-Pin MAX (derate 5.6mW/C above +70C) ...........444mW CC REG, FB, REGON to GND..........................-0.3V to (V + 0.3V) 14-Pin SO (derate 8.3mW/C above +70C)................667mW CC BIAS, C , MUTE, IN , MICIN to GND ..............-0.3V to the 20-Pin SO (derate 10.0mW/C above +70C)..............800mW BYPASS Larger of (V +0.3V) or (SV +0.3V) 16-Pin TSSOP (derate 9.4mW/C above +70C) .........755mW CC CC OUT , MICOUT to GND................................-0.3V to the Smaller Operating Temperature Range ..........................-40C to +85C of +5.5V, or (V + 0.3V) CC Storage Temperature Range .............................-65C to +150C Duration of Output Short-Circuit to GND or V ................10min CC Lead Temperature (soldering, 10s) .................................+300C 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 = SV = +5V, R = on all outputs, C = 1F, C = 1F, C = 10F (MAX4299), T = T to T , unless other- CC CC L BYPASS BIAS REG A MIN MAX wise noted. Load resistors (R ) are terminated to 2.25V. Typical values are at T = +25C. Specifications apply to both MAX4298 and L A MAX4299, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage Range V Inferred from PSRR test 4.5 5.5 V CC MAX4298 10.2 17.5 Quiescent Current I mA CC MAX4299 10.6 18.0 MAX4298 10.2 17.5 Mute Quiescent Current mA MAX4299 10.6 18.0 V = 1.125V, V = 0 300 500 BIAS CC SV Current (Note 2) I A CC SVCC V = 2.25V, V = 5.0V 7 BIAS CC DRIVER AMPLIFIERS Input Offset Voltage V 1 10 mV OS Input Bias Current I 0.2 nA BIAS DC, V = 4.5V to 5.5V 115 CC Power-Supply Rejection PSRR f = 20kHz 93 dB Ratio f = 100kHz 80 R = 10k 1.45 1.59 L Output Drive V R = 32 1.2 1.53 V OUT L RMS R = 16 1.0 1.48 L A = -1V/V, f = 1kHz, R = 10k , V L 0.0008 V = 1.5V OUT RMS A = -1V/V, f = 1kHz, R = 32 , V L THD + Noise 0.02 0.1 % V = 1.2V , (Notes 3, 4) OUT RMS A = -1V/V, f = 1kHz, R = 16 , V L 0.04 V = 1.0V OUT RMS Full-Scale Signal-to-Noise Ratio R = 10k , L SNR 105 dB (Note 4) V = 1.06V , A = -1V/V OUT RMS V Capacitive Drive 22 nF Open-Loop Voltage Gain A R = 32 , 0.55V V V - 0.55V 76 87 dB VOL L OUT CC Unity-Gain Bandwidth GBW 1.3 MHz 2 MAX4298/MAX4299