MAX9718/MAX9719 19-3050 Rev 7 4/10 Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers General Description Features The MAX9718/MAX9719 differential input audio power 2.7V to 5.5V Single-Supply Operation amplifiers are ideal for portable audio devices with Very High -93dB PSRR at 217Hz internal speakers. The differential input structure improves noise rejection and provides common-mode 1.4W into 4 at 1% THD+N (per Channel) rejection. A bridge-tied load (BTL) architecture mini- Differential Input mizes external component count, while providing high- Internal Fixed Gain to Reduce Component Count quality, power audio amplification. The MAX9718 is a single-channel amplifier while the MAX9719 is a dual- Adjustable Gain Option (MAX9718A/H/MAX9719A) channel amplifier for stereo systems. Both devices 100nA Low-Power Shutdown Mode deliver 1.4W continuous average power per channel to No Audible Clicks or Pops at Power-Up/Down a 4 load with less than 1% THD+N while operating from a single +5V supply. The devices are available as Improved Performance Pin-Compatible Upgrade adjustable gain amplifiers or with internally fixed gains to LM4895 (MAX9718D/G) of 0dB, 3dB, and 6dB to reduce component count. 1.8V Logic Compatible A shutdown input disables the bias generator and amplifiers and reduces quiescent current consumption to less than 100nA. The MAX9718 shutdown input can Ordering Information be set as active high or active low. These devices fea- PIN- T O P ture Maxims comprehensive click-and-pop suppres- PART TEMP RANGE PACKAGE M A R K sion circuitry that reduces audible clicks and pops during startup and shutdown. M A X97 1 8 AEBL + TG 45 -40C to +85C 3 x 3 UCSP +ADX The MAX9718 is pin compatible with the LM4895, MAX9718AETB+T -40C to +85C 10 TDFN-EP* +AAV and is available in 9-bump UCSP, 10-pin TDFN, and +Denotes lead(Pb)-free/RoHS-compliant package. 10-pin MAX packages. The MAX9719 is available in *EP = Exposed pad. 16-pin TQFN, 16-pin TSSOP, and 16-bump UCSP pack- G45 indicates protective die coating. ages. Both devices operate over the -40C to +85C extended temperature range. Ordering Information continued at end of data sheet. Applications Pin Configurations appear at end of data sheet. Mobile Phones UCSP is a trademark of Maxim Integrated Products, Inc. PDAs MAX is a registered trademark of Maxim Integrated Products, Inc. Portable Devices Simplified Block Diagrams SINGLE SUPPLY 2.7V TO 5.5V SINGLE SUPPLY 2.7V TO 5.5V OUTL+ INL+ OUT+ IN+ INL- OUTL- OUTR+ INR+ IN- OUT- SHDN INR- OUTR- SHDM MAX9718 SHDN MAX9719 Maxim Integrated Products 1 For pricing delivery, and ordering information please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLELow-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers ABSOLUTE MAXIMUM RATINGS Supply Voltage (V to GND) ..................................-0.3V to +6V Operating Temperature Range ...........................-40C to +85C CC Any Other Pin to GND ...............................-0.3V to (V + 0.3V) Junction Temperature .....................................................+150C CC IN , BIAS, SHDM, SHDN, SHDN Continuous Current ........20mA Storage Temperature Range .............................-65C to +150C OUT Short-Circuit Duration to GND or V .............Continuous Lead Temperature (soldering, 10s) .................................+300C CC Continuous Power Dissipation (T = +70C) Soldering Temperature (reflow) .......................................+260C A 9-Bump UCSP (derate 5.2mW/C above +70C) .......1067mW 10-Pin TDFN (derate 24.4mW/C above +70C) ........1951mW 10-Pin MAX (derate 10.3mW/C above +70C) ..........825mW 16-Bump UCSP (derate 8.2mW/C above +70C) .....1633mW 16-Pin TQFN (derate 16.9mW/C above +70C) ........1349mW 16-Pin TSSOP (derate 21.3mW/C above +70C) ......1702mW 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 CHARACTERISTICS5V Supply (V = 5V, GND = 0, SHDN/SHDN = V (MAX9718/MAX9719), SHDM = GND (MAX9718), R = R = 10k (MAX971 A/H), CC CC IN F T = +25C. C = 0.1F, no load. Typical values are at T = +25C, unless otherwise noted.) (Note 1) A BIAS A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V 2.7 5.5 V CC V = V = V , T = -40C to +85C, IN- IN+ BIAS A Supply Current I 5.0 7.5 mA CC per amplifier (Note 2) Shutdown Supply Current I SHDN = SHDM = SHDN = GND, per amplifier 0.1 1 A SHDN V 0.7 x V SHDN, SHDN, SHDM IH CC V MAX9718A/B/C/D Threshold V 0.3 x V IL CC V 1.4 SHDN, SHDN, SHDM IH MAX9718E/F/G/H V Threshold V 0.4 IL A = 0dB, MAX971 A/H, V 1 10 MAX971 B/E Output Offset Voltage V V = V = V mV OS IN- IN+ BIAS A = 3dB, MAX971 C/F 1 15 V A = 6dB, MAX971 D/G 1 20 V A = 0dB, MAX971 B/E 0.5 V - 0.5 V CC Inferred from A = 3dB, MAX971 C/F 0.5 V - 0.6 V CC CMRR test Common-Mode Input Voltage V V IC A = 6dB, MAX971 D/G 0.5 V - 0.8 V CC External gain, MAX971 A/H 0.5 V - 1.2 CC Input Impedance R MAX971 B/E, MAX971 C/F, MAX971 D/G 10 15 20 k IN -50 -60 Common-Mode Rejection Ratio CMRR dB f = 1kHz -60 N V = V = V , IN- IN+ BIAS f = 217Hz -93 Power-Supply Rejection Ratio PSRR V = 200mV , dB RIPPLE P-P f = 1kHz -90 R = 8, C = 1F L BIAS R = 8 0.8 1.1 THD+N = 1%, L Output Power P W OUT f = 1kHz (Note 4) IN R = 4 1.4 L Total Harmonic Distortion Plus R = 8, f = 1kHz, P = 0.75W, L IN OUT THD+N 0.002 % Noise V = 5V, A = 6dB (Note 5) CC V 2 MAX9718/MAX9719