Rad-hard PLL works up to 5 GHz

September 26, 2016 // By Susan Nordyk
Based on Peregrine Semiconductor’s radiation-tolerant UltraCMOS process, the PE97640 fractional-N phase-locked loop targets commercial space applications. The device, which is available exclusively from e2v, is capable of frequency synthesis up to 5 GHz and minimizes phase noise.

Along with a 5/6 or 10/11 dual modulus prescaler with a frequency range of 4 GHz or 5 GHz, respectively, the PE97640 integrates counters, a delta-sigma modulator, phase comparator, and charge pump. Phase noise figure-of-merit is -225 dBc/Hz with a 10/11 prescaler and -255 dBc/Hz with a 5/6 prescaler. Flicker figure-of-merit is -259 dBc/Hz with the 10/11 prescaler and -265 dBc/Hz with the 5/6 prescaler. Counter values are programmable through either a serial interface or directly hard-wired.


Intended for commercial applications and able to perform under harsh space conditions for over 10 years, the PE97640 is radiation-tolerant to 100 kRad (Si) total dose and immune to single-event latch-up. The PLL, which comes in a 64-lead CQFP, consumes 80 mA at 2.8V, enabling RF system engineers to better allocate power resources.


e2v, www.e2v-us.com and www.e2v-us.com/products/semiconductors/peregrinerf/


Peregrine Semiconductor (now a Murata company); www.psemi.com