Product category:
Communications ICs (Wired)
News Release from: Intersil | Subject: ISL5216
Edited by the Electronicstalk Editorial
Team on 29 March 2002
Four in one for digital down convertor
Intersil has a new four-channel digital down convertor that includes four independent channels on a single chip.
Intersil has a new four-channel digital down convertor that includes four independent channels on a single chip The ISL5216 is the latest addition to Intersil's CommLink family of software defined radio (SDR) circuits and provides a flexible and cost-effective solution for high dynamic range applications including 3G cellular basestations where processing of multiple channels is required in a small physical space
This article was originally published on Electronicstalk on 8 Jan 2001 at 8.00am (UK)
Related stories
Ultra-low-power MOSFETs prolong battery life
Intersil has launched its advanced new DenseTrench power MOSFET family of discrete power devices designed for higher-efficiency low-voltage power switching applications.
Programmable up-converter simplifies basestations
Intersil has added a new highly integrated quad up-convertor to its CommLinkT family of digital radio ICs for fixed basestation applications.
The device replaces more expensive analogue and programmable logic devices and can be used in wideband and narrowband applications.
It supports all protocols and standards, including 3G wireless protocols.
Performing all the functions of down conversion, filtering, non-integer resampling and automatic gain control (AGC), the ISL5216 is a novel solution for communications system designers.
Further reading
Intersil and Sony develop new wireless TV solution
Intersil has worked with Sony to develop Point Co-ordination Function (PCF) technology based on Intersil's latest Prism 2.5 wireless LAN chipset solution.
Wireless LAN technology for the workplace
Intersil is introducing a new brand of wireless products called Prism/work specifically designed to meet the growing need for wireless LANs in the workplace.
Its fully integrated and flexible quad programmable down convertor (PDC) receives incoming wideband and narrowband signals from high-speed analogue-to-digital convertors.
Located between the digital-to-digital convertor and the baseband processor, the device tunes, filters and decimates the signal from intermediate frequency (IF) to baseband.
With the CommLink ISL5216, designers have greater flexibility in input and output routing to the filter compute engine (FCE).
The FCE allows the user to design and program the filters in many different ways.
Designers can program up to 32 instructions per channel, with each instruction being a different filter.
The signal routing options allow the user to extend the bandwidth by polyphasing or cascading the channel filters.
Depending on application requirements, the output rate can be adjusted through the interpolation half band filters and non-integer resamplers in the back end of the device.
Intersil's CommLink ISL5216 features a 24bit internal data path.
This higher-resolution device does not introduce as many quantisation errors as lower-resolution solutions.
The device is also the only down convertor on the market to offer an internal digital AGC with a range of 0-96dB, greatly reducing the complexity of the baseband processor.
The CommLink ISL5216 features an input sample rate of up to 95MHz.
This allows improved performance as higher input rates enable the design of longer filter impulse responses, resulting in better filters or processing at higher bandwidths.
The device also functions at significantly lower power (2.5V core, 3.3V I/Os), about 1.4W with all four channels fully utilized at 80MHz.
Spurious-free dynamic range of the carrier numerically controlled oscillator (NCO) is greater than 115dB, providing exceptional performance even for signals of very low power.
The resampling feature allows non-integer input to output rates after channel filtering, greatly simplifying the interface to and requirements of baseband processors.
• Intersil: contact details and other news
• Email this article to a colleague
• Register for the free Electronicstalk email newsletter
• Electronicstalk Home Page
Search the Pro-Talk network of sites
