9.125 GHz to 10.375 GHz Fractional–N Synthesizer, FMCW Radar Linear Chirp Generator

The WEA910S22G is a PLL-based high performance frequency synthesizer implemented in 22FDX FD-SOI process with integrated multifunction chirp frequency generator. It generates a 10 GHz fundamental frequency and various frequency ramps with integrated VCO utilizing a 64band autocalibration system. The synthesizer is powered by a 1.5 V and 0.8 V supplies. The WEA910S22G occupies a silicon area of 3150 um x 700 um (2.2 mm2). It exhibits high performance, high integration and flexibility for automotive RADAR applications.

• Low phase Noise PLL
• Differential reference input 300 MHz - 700 MHz
• 0.8 V PLL Supply - 1.5 V VCO Supply
• 24 bits Programmable order MASH (1st /2nd /3rd )
• Banerjee Figure of Merit: -217 dB
• Programmable Active and Passive Loop Filter with high/low loop bandwidth mode
• LC-VCO with 64 bands
• Automatic Band Selection System
• Output Frequency 9.125 GHz - 10.375 GHz
• 125 MHz tuning range per Band, Lock time <1 us, Chirp ramp < 10 us, FM Chirp Linearity error < 1%
• Typical In-band noise -100 dBc/Hz
• Area: 3150 um x 700 um (2.2 mm2 )

• Chirp Generator for Radar Applications