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Audio processing chip boosts performance from small, low-cost speakers
February 04, 2011 // Paul Buckley
STMicroelectronics has unveiled an audio processing chip that connects directly to the latest miniature microphones and provides a new way of boosting performance from small, low-cost, or even damaged speakers. The device allows customers to deliver market-leading miniaturized audio products offering outstanding sound quality.
The new device, the STA321MP, joins ST’s SoundTerminal audio IC family, and features a built-in interface for a MEMS digital microphone as well as a standard microphone input. With tiny dimensions and low sensitivity to noise from LCDs and power components, MEMS microphones are ideal for multi-function products such as smartphones. The STA321MP permits direct connection of a MEMS microphone, saving parts count and cost.
In addition, the STA321MP has a second MEMS input that can be connected to a tiny sensor for detecting speaker movements. This allows designers to apply active-sound shaping using ST patented techniques to optimize speaker performance. In active-sound shaping, the processor compensates automatically for distortion or damage to the speaker enabling high-quality audio performance from over-driven speakers or from those with torn or restricted-movement cones.
As a third-generation SoundTerminal IC, the STA321MP delivers advanced features and performance. Support for designers includes complete development kits for MEMS-based systems, as well as the APWorkbench graphical development environment. APWorkbench helps designers configure Sound Terminal products intuitively, and includes features for setting up active sound shaping.
Availability and Pricing
The STA321MP is available now in a 7 x 7 mm QFN package, priced at $3.00 in quantities of 1000. Alternative pricing options are available for larger quantities.
Visit STMicroelectronics at www.st.com
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Filter Wizard
Check out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
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The development platform for i.MX 6Quad from element14 (built to the Freescale SABRE Lite design) is an evaluation platform featuring the powerful i.MX 6Q, a multimedia application processor with Quad ARM Cortex-A9 cores at 1.2 GHz from Freescale Semiconductor.
This month, Freescale and element14 are giving away five such platforms, worth £128.06 each, for EETimes Europe's readers to win. The platform helps evaluate the rich set of peripherals and includes a 10/100/Gb Ethernet port, SATA-II, HDMI v1.4, LVDS, parallel RGB interface, touch screen interface, analog headphone/microphone, micro TF and SD card interface, USB, serial port, JTAG, camera interface, and input keys for Android.
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In our previous reader offer, Pico Technology was giving away one of its recently launched PicoScope 3207B, a 2-channel USB 3.0 oscilloscope worth 1451 Euros. Lucky winner Mr L. Sanchez-Gonzalez from Spain should be receiving his PicoScope 3207B soon. Let's wish them some interesting findings with his projects.
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December 15, 2011 | Texas instruments | 222901974
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