Add-on digital filter IC facilitates quick monitoring system upgrades

Allen, Tex.&#8212Quickfilter Technologies' QF1D512 SavFIRe is a finite impulse response (FIR) digital filter that designers can add between an existing analog-to digital-converter (ADC) and the host controller (microcontroller, microprocessor, digital signal processor or field programmable gate array). Alternatively, it can be connected as a co-processor device for controllers with embedded ADCs. Thus it offers a fast and simple upgrade path for existing systems.

“The QF1D512 nicely complements our previously released QF4A512,” said Steve Brightman, director of marketing. “The QF4A512 features a complete analog interface including signal conditioning and ADC as well as digital filters. The SavFIRe approach allows our customers to implement precision digital filtering while retaining their existing analog front end and preferred ADC, or to add precision digital filtering to a system using a micro with embedded ADC.”

Applications include industrial monitoring such as vibration sensing, flow measurement and leak detection, medical patient monitoring and diagnostics, seismic and sonar. Its low-power attributes also make it suited to Wireless Sensor Network (WSN) applications.

The chip's companion development kit (QF1D512-DK) allows the device to be configured to work with almost any ADC up to 24 bits, and a variety of precision filters can be quickly designed without the need to write code. The QF1D512-DK includes the lastest version of the company's Quickfilter Pro software. Developed specifically for the QF1D512, this software version uses the same filter design engine as earlier versions and adds a more intuitive user interface for configuring the chip itself. The development hardware allows this configuration to be downloaded into the chip to verify filter performance.

The board features an on-board ADC to allow operation “out of the box” and also provides the option for users to add their own preferred ADCs to match their end application. This type of flexibility is further extended to allow the development board to be connected to the user's own host microcontroller, allowing system development to proceed without the need for custom hardware.

Click here to access the product datasheet. Click here for additional information on the development kit. The QF1D512, in a 3-by-3 mm QFN package and characterized over the industrial temperature range, is priced at $2.98 each in 1k pieces.

Quickfilter Technologies , 1-214-547-0460,

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