Hittite has released the HMC877LC3 time delay/phase shifter, designed for clock chain and skew adjustment in 10G-RZ, 40G/100G RZ-DQPSK fibre-optic applications.
The device provides up to 1,4 UI (500°) continuously adjustable delay over a wide 8 to 23 GHz frequency range, while maintaining a constant differential output voltage. It accepts either single-ended or differential input signals, while providing a 500 to 900 mVp-p programmable differential output swing. The HMC877LC3 provides a time delay/phase shift which is linearly monotonic with respect to the differential delay control voltage, over a ±0,6 V tuning range. On-chip compensation circuitry ensures a stable programmable time delay over both frequency and temperature.
A high delay control modulation bandwidth (3 dB rolloff point) of 2,5 GHz combined with single +3,3 V operation also make the HMC877LC3 suitable for phase modulation in military and space, test and measurement and broadband applications.
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