This article refers to the address: http://
Maxim Integrated Products introduces the MAX9877, the industry's smallest audio subsystem. The device combines a high efficiency, high power, mono Class D speaker amplifier, DirectDrive® stereo headphone amplifier and a low noise bypass analog switch. In addition to integrating these features, the MAX9877 incorporates Maxim's third-generation, ultra-low EMI, Class D amplifier technology to provide Class AB amplifier audio performance with Class D amplifier efficiency. When powered from a 3.7V supply, the device delivers 725mW of output power to an 8Ω load with efficiencies as high as 85% (max). The MAX9877 offers the industry's largest output power from a Li-Ion battery, making it ideal for mobile phones, portable media players (PMPs), and other applications requiring high sound quality, high output power, and high efficiency.Maxim's patent-protected DirectDrive* architecture produces a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors. To further save cost and space, the MAX9877 uses Maxim's Active Radiation Suppression** and patented Spread Spectrum Modulation technology to dramatically reduce EMI and eliminate the output filters typically required for Class D amplifiers. In addition, the integrated low noise analog DPST switch allows bypassing of Class D amplifiers to reduce power consumption in portable devices and eliminates the need for external switches. The MAX9877 also features input mixing, volume control, comprehensive click/pop suppression, and a flexible user-defined input architecture (providing 3 preamplifier gain settings). All control is done through the I2C interface.
The MAX9877 is available in a 2.5mm x 2mm, 20-bump WLP package and operates over the -40°C to +85°C extended temperature range. The chip starts at $1.62 (1000 sheets, FOB USA). An evaluation board is available to speed up the design.
SST Heat Meter,Smart Radiator Heat Flow Meter,Modbus Flow Meter Heat Meter
Transformer Electric Energy Meter Co., Ltd. , http://www.nswatermeter.com