9-3050; Rev 7; 4/10 KIT ATION EVALU E L B A AVAIL Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers The MAX9718/MAX9719 differential input audio power amplifiers are ideal for portable audio devices with internal speakers. The differential input structure improves noise rejection and provides common-mode rejection. A bridge-tied load (BTL) architecture minimizes external component count, while providing highquality, power audio amplification.
MAX9718/MAX9719 Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC to GND) ..................................-0.3V to +6V Any Other Pin to GND ...............................-0.3V to (VCC + 0.3V) IN_, BIAS, SHDM, SHDN, SHDN Continuous Current ........20mA OUT_ Short-Circuit Duration to GND or VCC .............Continuous Continuous Power Dissipation (TA = +70°C) 9-Bump UCSP (derate 5.2mW/°C above +70°C) .......1067mW 10-Pin TDFN (derate 24.
Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers (VCC = 5V, GND = 0, SHDN/SHDN = VCC (MAX9718/MAX9719), SHDM = GND (MAX9718), RIN = RF = 10kΩ (MAX971_A/H), TA = +25°C. CBIAS = 0.1μF, no load. Typical values are at TA = +25°C, unless otherwise noted.
ELECTRICAL CHARACTERISTICS—3V Supply (continued) (VCC = 3V, GND = 0, SHDN/SHDN = VCC (MAX9718/MAX9719), SHDM = GND (MAX9718), RIN = RF = 10kΩ (MAX971_A/H), TA = +25°C. CBIAS = 0.1μF, no load. Typical values are at TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL Output Power POUT Total Harmonic Distortion Plus Noise THD+N CONDITIONS MIN TYP RL = 8Ω, THD+N = 1%, fIN = 1kHz (Note 4) RL = 8Ω, fIN = 1kHz, POUT = 0.25W, AV = 6dB MAX UNITS 475 mW 0.
Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers OUTPUT POWER = 800mW 0.01 0.1 OUTPUT POWER = 50mW 0.01 MAX9718 toc06 MAX9718 toc05 10 VCC = 3V RL = 4Ω AV = 4 1 THD+N (%) THD+N (%) 0.1 VCC = 3V RL = 4Ω AV = 2 1 THD+N (%) VCC = 5V RL = 8Ω AV = 4 1 10 MAX9718 toc04 10 TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY OUTPUT POWER = 175mW 0.1 0.
Typical Operating Characteristics (continued) (VCC = 5V, CBIAS = 0.1μF, THD+N measurement bandwidth = 22Hz to 22kHz, TA = +25°C, unless otherwise noted.) 0.1 fIN = 1kHz 1 fIN = 10kHz 0.1 VCC = 3V RL = 8Ω AV = 2 10 THD+N (%) THD+N (%) THD+N (%) fIN = 10kHz 1 VCC = 3V RL = 4Ω AV = 4 10 100 MAX9718 toc14 VCC = 3V RL = 4Ω AV = 2 10 100 MAX9718 toc13 100 TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT POWER TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT POWER 1 0.
Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers POWER DISSIPATION vs. OUTPUT POWER 400 300 THD+N = 1% 200 MAX9718 toc23 1.4 1.0 POWER DISSIPATION (W) OUTPUT POWER (mW) THD+N = 10% VCC = 5V RL = 4Ω f = 1kHz AV = 2 1.6 POWER DISSIPATION (W) VCC = 3V f = 1kHz AV = 2 500 1.8 MAX9718 toc22 600 POWER DISSIPATION vs. OUTPUT POWER 1.2 1.0 0.8 0.6 0.4 100 MAX9718 toc24 OUTPUT POWER vs. LOAD RESISTANCE VCC = 5V RL = 8Ω f = 1kHz AV = 2 0.8 0.6 0.4 0.2 0.2 0 100 0.6 0.9 1.
Typical Operating Characteristics (continued) (VCC = 5V, CBIAS = 0.1µF, THD+N measurement bandwidth = 22Hz to 22kHz, TA = +25°C, unless otherwise noted.) CROSSTALK vs. FREQUENCY CROSSTALK vs.
Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers 3 2 0.01 0 VCC = 3V -0.01 -40 -15 10 35 60 40 VCC = 3V 30 0 -40 85 50 10 -0.03 0 VCC = 5V 60 20 -0.02 1 TO -3dB OF FINAL VALUE 70 TURN-ON TIME (ms) VCC = 3V VCC = 5V MAX9718 toc38 0.02 4 80 MAX9718 toc37 VCC = 5V SHUTDOWN CURRENT (μA) SUPPLY CURRENT (mA) 0.03 MAX9718 toc36 6 5 TURN-ON TIME vs. DC BIAS BYPASS CAPACITOR SHUTDOWN CURRENT vs. TEMPERATURE SUPPLY CURRENT vs. TEMPERATURE -15 10 35 60 85 0 0.
MAX9718/MAX9719 Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers Pin Description (continued) PIN TDFN-EP/ µMAX UCSP TQFN-EP UCSP NAME TSSOP-EP — — 10 B4 12 OUTL- Left-Channel Bridge Amplifier Negative Output — — 12 D4 14 OUTR+ Right-Channel Bridge Amplifier Positive Output — — 15 D2 1 OUTR- Right-Channel Bridge Amplifier Negative Output — — 16 D1 2 INR- — — — — — EP Detailed Description The MAX9718/MAX9719 are 1.4W BTL speaker amplifiers.
Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers MAX9718/MAX9719 RF RF VOUT(P-P) +1 2 x VOUT(P-P) VOUT(P-P) -1 INVERTING DIFFERENTIAL INPUT RIN MAX9718A/H MAX9719A IN- (OPTIONAL) OUT+ BIAS GENERATOR Figure 1. Bridge-Tied Load Configuration Power Dissipation and Heat Sinking Under normal operating conditions, the MAX9718/ MAX9719 dissipate a significant amount of power.
MAX9718/MAX9719 Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers Input Filter The fully differential amplifier inputs can be biased at voltages other than midsupply. The common-mode feedback circuit adjusts for input bias, ensuring the outputs are still biased at midsupply. Input capacitors are not required as long as the common-mode input voltage is within the specified range listed in the Electrical Characteristics table.
Low-Cost, Mono/Stereo, 1.
MAX9718/MAX9719 Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers System Diagram 2.7V TO 5.5V 10μF 1μF VCC MAX9719 IN1+ INL+ OUTL+ IN1- INL- OUTL- IN2+ INR+ IN2- INR- OUTR+ OUTRGND BIAS SHDN 0.1μF 2.7V TO 5.5V IN- Q MAX961 Q 220kΩ VCC IN+ 0.1μF 0.1μF SHDN MAX9722B 1μF INL OUTL 1μF OUTR INR 2.7V TO 5.5V PVDD PVSS SVSS SVDD 1μF 0.
Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers 2.7V TO 5.5V SUPPLY VCC 1.0μF INVERTING DIFFERENTIAL INPUT NONINVERTING DIFFERENTIAL INPUT R2 CIN R1 IN- OUT+ (OPTIONAL) CIN R1 IN+ OUTR2 (OPTIONAL) BIAS CBIAS 0.1μF BIAS GENERATOR SHDN SHDM MAX9718B/E MAX9718C/F MAX9718D/G SHUTDOWN CONTROL GND RF RF 2.7V TO 5.5V SUPPLY VCC 1.0μF INVERTING DIFFERENTIAL INPUT NONINVERTING DIFFERENTIAL INPUT CIN RIN INOUT+ (OPTIONAL) CIN RIN IN+ (OPTIONAL) BIAS CBIAS 0.
MAX9718/MAX9719 Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers Functional Diagrams (continued) 2.7V TO 5.5V SUPPLY VCC 1.0μF INVERTING DIFFERENTIAL INPUT NONINVERTING DIFFERENTIAL INPUT CIN OUTL+ (OPTIONAL) CIN R1 INL+ OUTLR2 (OPTIONAL) BIAS NONINVERTING DIFFERENTIAL INPUT R2 R1 INL- CBIAS 0.1μF INVERTING DIFFERENTIAL INPUT MAX9719B MAX9719C MAX9719D BIAS GENERATOR SHDN CIN SHUTDOWN CONTROL R2 R1 INR- OUTR+ (OPTIONAL) CIN R1 INR+ (OPTIONAL) OUTRR2 GND RF RF 2.
Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers TOP VIEW TOP VIEW (BUMPS ON BOTTOM) 10 OUT+ SHDN 1 IN- 2 9 VCC SHDM 3 8 N.C. IN+ 4 7 GND BIAS 5 6 OUT- MAX9718 MAX9718 3 1 2 A IN+ BIAS OUT- B VCC SHDM GND C IN- SHDN OUT+ μMAX 3 × 3 UCSP TOP VIEW TOP VIEW (BUMPS ON BOTTOM) SHDN 1 10 OUT+ IN- 2 9 VCC SHDM 3 IN+ 4 7 GND BIAS 5 6 OUT- 8 N.C. MAX9718 TDFN (3mm × 3mm × 0.
Package Information For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE DOCUMENT NO.
Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers ______________________________________________________________________________________ 19 MAX9718/MAX9719 Package Information (continued) For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.
MAX9718/MAX9719 Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers Package Information (continued) For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. COMMON DIMENSIONS 20 PACKAGE VARIATIONS MIN. MAX. PKG. CODE N D2 E2 e JEDEC SPEC b A 0.
Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers 10L UMAX, EXPPADS.EPS 21-0109 D 1 1 ______________________________________________________________________________________ 21 MAX9718/MAX9719 Package Information (continued) For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only.
Package Information (continued) For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. 16L,UCSP.EPS MAX9718/MAX9719 Low-Cost, Mono/Stereo, 1.
Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers 24L QFN THIN.EPS ______________________________________________________________________________________ 23 MAX9718/MAX9719 Package Information (continued) For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only.
MAX9718/MAX9719 Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers Package Information (continued) For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.
Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers ______________________________________________________________________________________ 25 MAX9718/MAX9719 Package Information (continued) For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.
MAX9718/MAX9719 Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers Package Information (continued) For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.
Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers REVISION NUMBER REVISION DATE DESCRIPTION PAGES CHANGED 5 2/08 Updated Pin Configurations. 6 3/09 Added lead-free and G45 options to Ordering Information 1, 13 17 7 4/10 Updated continuous power dissipation for 9-bump and 16-bump UCSP packages and corrected error in the Pin Description section 2, 9 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product.