The innovative MEMS microphones that use sensor technology from OMRON will significantly raise the bar in sound quality, reliability, and cost-effectiveness for existing and emerging audio applications like cell phones, wireless devices and games that respond to voice inputs, across a range of market segments. MEMS microphones have recently emerged to compete with the traditional electret condenser microphones (ECM). Leveraging established high-volume silicon manufacturing processes, micro-machined acoustic devices meet price points set by electret microphones, while boasting superior reliability and robustness. Importantly, MEMS microphones can be made smaller than the most compact ECMs and are less susceptible to mechanical vibration, temperature variations and electromagnetic interference, which is important in cell phones and other devices with an audio input, such as notebook computers, video recorders, digital cameras, as well as hearing aids or electronic stethoscopes...
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The MAX9670 and MAX9671 are +3.3V dual SCART solutions with audio volume control for set-top boxes and A/V receivers that have two SCART connectors. These devices utilize power-saving technologies to achieve the industry's lowest power consumption. At 49mm² or smaller, the MAX9670/MAX9671 are the industry's smallest complete dual SCART solutions. Though competing dual SCART devices require +5V and +12V supplies, the MAX9670 and MAX9671 operate audio and video circuitry from +3.3V and only require +12V for the slow-switching signal. An internal charge pump inverts the +3.3V supply and generates a -3.3V supply, thereby providing sufficient voltage swing to support 2.0VRMS audio. These SCART ICs integrate load-detect and activity-detect circuitry that enables designers to intelligently reduce system power consumption for extended power savings. The MAX9670 is available in a compact, 6mm x 6mm, 40-pin TQFN package, while the MAX9671 is packaged in a 7mm x 7mm, 44-pin TQFN. Both devices are fully specified over the 0°C to +70°C commercial temperature range...
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The FMS6646 Low Cost Video Filter (LCVF) is intended to replace passive LC filters and drivers with a low-cost integrated device. Six Butterworth filters provide improved image quality compared to typical passive solutions. The combination of low-power Standard-Definition (SD) and High-Definition (HD 1080p) filters greatly simplifies DVD video output circuitry. Three channels offer fixed SD filters, while the other three are selectable between SD and HD filters.The FMS6646 offers a fixed gain of 6dB. The FMS6646 may be directly driven by a DC-coupled DAC output or an AC-coupled signal. Internal diode clamps and bias circuitry may be used if AC-coupled inputs are required (see the Applications Information section for details). The outputs can drive AC- or DC-coupled single (150W) video loads. DC-coupling the outputs removes the need for output coupling capacitors. The input DC levels are offset approximately +280mV at the output...
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The STA370BWS SoundTerminal chip delivers increased performance at a highly competitive price and employs ST’s leading-edge Full Flexible Amplifier (FFX) technology to deliver high-quality stereo audio at 10W and above, in various consumer applications, including the latest ultra-thin LED-backlit Flat TVs. The STA370BWS is the first audio device to use the company’s proprietary BCD8 process technology. An evolution of ST’s successful market-leading BCD6S process, BCD8 is the eighth generation of ST’s Bipolar/CMOS/DMOS technology, which allows the company to build analog, logic, and high-voltage functions on a single chip to increase performance and reduce cost. In developing the STA370BWS, ST has leveraged its BCD8 process to integrate more sophisticated audio signal processing within the CMOS section, enabling a better listening experience for end users. The device also performs a short-circuit check at power on, which increases application safety and prevents pc-board damage, leading to minimum rework costs for equipment manufacturers...
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