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MAX9789BETJ+ Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX9789BETJ+ Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 28 page Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers ________________________________________________________________ Maxim Integrated Products 1 Ordering Information 19-0606; Rev 3; 9/09 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. General Description The MAX9789/MAX9790 combine a stereo, 2W Class AB speaker power amplifier with a stereo 100mW DirectDrive® headphone amplifier in a single device. The MAX9789/MAX9790 are designed for use with the Microsoft Windows Vista® operating system and are fully compliant with Microsoft’s Windows Vista specifications. The headphone amplifier features Maxim’s patented† DirectDrive architecture that produces a ground-refer- enced output from a single supply to eliminate the need for large DC-blocking capacitors, as well as save cost, board space, and component height. A high +90dB PSRR and low 0.002% THD+N ensures clean, low-distor- tion amplification of the audio signal. Separate speaker and headphone amplifier control inputs provide independent shutdown of the speaker and headphone amplifiers, allowing speaker and head- phone amplifiers to be active simultaneously, if required. The industry-leading click-and-pop suppres- sion circuitry reduces audible transients during startup and shutdown cycles. The MAX9789 features an internal LDO that can be used as a clean power supply for a CODEC or other circuits. The LDO output voltage is set internally at 4.75V or can be adjusted between 1.21V and 4.75V using a simple resistive divider. The LDO is protected against thermal overloads and short circuits while providing 120mA of continuous output current and can be enabled indepen- dently of the audio amplifiers. By disabling the speaker and headphone amplifiers, and the LDO (for MAX9789), the MAX9789/MAX9790 enter low-power shutdown mode and draw only 0.3µA. The MAX9789/MAX9790 operate from a single 4.5V to 5.5V supply and feature thermal-overload and output short-circuit protection. Devices are specified over the -40°C to +85°C extended temperature range. Features Applications Note: All devices are specified over the -40°C to +85°C extended temperature range. + Denotes a lead-free/RoHS-compliant package. * EP = Exposed pad. ** Future product—contact factory for availability. PART PIN-PACKAGE INTERNAL LDO tON (ms) MAX9789AETJ+ 32 TQFN-EP* Yes 100 MAX9789BETJ+** 32 TQFN-EP* Yes 25 MAX9789CETJ+ 32 TQFN-EP* Yes 100 MAX9790AETJ+ 32 TQFN-EP* No 100 MAX9790BETJ+** 32 TQFN-EP* No 25 Simplified Block Diagrams MAX9789 SPKR_EN HP_EN MUTE GAIN1 GAIN2 SPEAKER SUPPLY 4.5V TO 5.5V HEADPHONE SUPPLY 3.0V TO 5.5V LDO 4.5V TO 5.5V SPKR_INR SPKR_INL HP_INR HP_INL 1.21V TO 4.75V o Microsoft Windows Vista Compliant o Class AB 2W Stereo BTL Speaker Amplifier o 100mW DirectDrive Headphone Amplifier Eliminates Costly, Bulky DC-Blocking Capacitors o Excellent RF Immunity o Integrated 120mA LDO (MAX9789) o High +90dB PSRR, Low 0.002% THD+N o Low-Power Shutdown Mode o Click-and-Pop Suppression o Short-Circuit and Thermal-Overload Protection o Available in 32-Pin Thin QFN (5mm x 5mm x 0.8mm) Package Notebook Computers Tablet PCs Portable Multimedia Players Windows Vista is a registered trademark of Microsoft Corp. Pin Configurations appear at end of data sheet. †U.S. Patent # 7,061,327. Simplified Block Diagrams continued at end of data sheet. DirectDrive is a registered trademark of Maxim Integrated Products, Inc. |
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