Woburn, Mass. Skyworks Solutions Inc. has launched a line of monolithic, digitally programmable low-pass filters in single- and dual-band versions. The SKY73201-364LF for single bands and SKY73202-364LF for dual bands are configured as 6th order Butterworth to provide extremely high stop-band isolation while maximizing pass-band flatness and minimizing group delay distortion, said Skyworks.
The SKY73201-364LF and SKY73202-364LF devices are programmable in 1 MHz steps, from 1 to 28 MHz, via the 3-wire serial peripheral interface (SPI). Nearly ideal Butterworth performance is maintained over temperature and process via a proprietary internal calibration circuit which derives its timing accuracy from a 20- or 40-MHz reference clock, according to the company.
The programmable low-pass filters are said to offer excellent linearity and low input noise level, making them suitable for extremely high dynamic range applications such as adjacent channel rejection filters in direct conversion receivers. Other applications include WiMAX CPEs and base stations, software-defined radio basebands, high-definition television tuners, medical imaging, and flexible anti-aliasing and reconstruction filters.
The SKY73201-364LF and SKY73202-364LF filters have a completely differential interface, but may also be used single-ended applications. They offer on-chip input/output drivers to allow easy integration between system components such as mixers, data converters, and variable gain amplifiers.
Availability: Samples are available through the Skyworks Innovation to Go online store. Evaluation boards are available on request.
Product information: SKY73201-364LF and SKY73202-364LF
Skyworks Solutions Inc., www.skyworksinc.com