Hittite offers DC to 24-GHz time delay for 10G, 40G RZ-DQPSK, and 100G DWDM RZ

Hittite Microwave Cor. has expanded its broadband time delay/phase shifter portfolio with the new HMC911LC4B. The device is designed for 10 Gbps, 40-Gbps RZ-DQPSK, and 100-Gbps DWDM RZ carver clock chain and skew adjustments in the fiber-optic domain.

The HMC911LC4B is a DC to 24-GHz broadband time delay device designed to provide a continuously variable delay from 0 ps to 70 ps while maintaining a constant differential output voltage swing. The device accepts either single-ended or differential input data, while the differential output swing is adjustable from 150 mVp-p to 800 mVp-p. The modulation bandwidth is 1.6 GHz, which Hittite asserts is the highest phase modulation bandwidth available in the market.

Aimed at both clock and data retiming applications, the HMC911LC4B features internal temperature compensation and bias circuitry to minimize delay variations with temperature. All RF input and outputs of the HMC911LC4B are internally terminated with 50 Ohms to Vcc, and may either be AC or DC coupled. Output pins can be connected directly to a 50 Ohm to Vcc terminated system, while DC blocking capacitors must be used if the terminated system input is 50 Ohms to a DC voltage other than Vcc.

The HMC911LC4B is housed in a ceramic RoHS-compliant 4x4-mm SMT package and is fully specified for operation from -40 °C to +85 °C.

Samples and evaluation PC boards for all SMT packaged products are available from stock.

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