| AAI Announces the AAP349 Variable Gain Digital Microphone Pre-Amplifier |
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Variable Gain Digital Microphone Pre-Amplifier Sunnyvale, CA, May 28, 2010 – ASIC Advantage, Inc. announces the AAP349 Variable Digital Microphone Pre-Amplifier featuring user-settable gain and variable high-pass filtering. The AAP349 is designed to provide the advantages of a digital solution, with additional analog enhancements for enhanced performance, such as extension of the input signal level to 1Vpp. The heart of the AAP349 is a Digital Microphone Pre-Amplifier, offering ultra-low noise performance with a 4th Order Sigma Delta ADC output. The ADC operates with a clock frequency of 1MHz to 4MHz, and provides superior noise and power performance with an inherent high degree of linearity. Based upon AAIs high-performance ECM Pre-Amplifier, the AAP349 extends the benefits into the digital domain with the addition of a capacitor adjustable high-pass filter corner frequency and resistor selectable gain. On board addition of a small capacitor and resistor values allow the user to set the gain from 0dB to 20dB, while also tailoring the low frequency response by adjusting the corner-frequency of an integral high pass filter. The integration of a high-pass filter can improve SNR 1db to 3dB from typical digital pre-amplifier solutions, as well as offering the potential for enhanced RF immunity. Additionally, the integral high-pass filter allows for rejection of low frequency noise from wind and other ambient sources. The variable gain offers the opportunity for trimming of gain of an amplifier board, or with use of switched resistor values to select the gain configuration of the microphone based on the requirements of the application at the microphone level. The high input signal level and the range of user programmable gain enable a significant extension of the microphones dynamic range, where one application potentially benefitting would be the use of a mobile device in a handset versus speakerphone mode of operation. The AAP349 operates from 1.6V to 3.6V, though its most optimum for 3.3V applications. It offers low power consumption, with a typical supply current of 475μA at 1.8V. Other features include 20kHz minimum signal bandwidth and a sleep mode to reduce supply current below 40μA with a fast wake-up scheme. The AAP349 comes in a 6-Pin configuration, with signals including Clock, Ground, Data Out, Gain Select, Input Signal and VDD. It comes in a Micro SMD Package, 810μm x 1200μm, with a thickness of 350μm maximum (including solder bumps). Pricing for a Tape and Reel quantity of 3.5k pieces is $0.22, with lower pricing available for high volume production. For samples, please contact your local representative where available, or in the absence of such contact the factory at This e-mail address is being protected from spam bots, you need JavaScript enabled to view it Any statements contained in this press release that are not statements of historical fact, including the performance, ruggedness and suitability of products for specific applications, may be deemed as forward looking statements. Various factors could cause the results to be different than stated or implied by these forward looking statements. As ASIC Advantage is a privately owned company, ASIC Advantage, Incorporated has no obligation to publicly communicate the results of any revisions to these forward looking statements. About ASIC Advantage, Inc. AAI is a privately owned, fabless semiconductor company that designs and manufactures mixed-signal ICs. In business since 1999, AAI has enjoyed substantial growth for close to a decade. ASIC Advantage’s custom business covers the Automotive, Portable Audio, Power Management, Aerospace and Satellite markets. ASIC Advantage is also extending its portfolio with a broader range of standard products in Power Management, LED Lighting, Portable Electronics, Sensors and Instrumentation and Motor Controls. ASIC Advantage is known for its technical innovation, with the highest levels of quality and reliability. © ASIC Advantage, 2010, All Rights Reserved. ASIC Advantage®, ASIC Advantage, Inc. ®, In-Plug®, “…Striking the Balance!” logo and combinations thereof are registered trademarks of ASIC Advantage, Inc. |
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