HMC497LP4 quadrature modulator

Hittite has introduced a direct quadrature modulator for digital modulation applications including: mobile/3G, broadband wireless access and ISM circuits.

The HMC497LP4, a low noise, high linearity direct quadrature modulator RFIC complements the HMC495LP3 250-3800 MHz direct quadrature modulator, and improves RF/LO bandwidth to 100-4000 MHz.

Additional major mid-band performance enhancements include: broadband noise floor from -157 to -159 dBm/Hz, output P1dB from +1 to +9 dBm, output IP3 from +13 to +23 dBm and carrier suppression from 36 to >42 dBc.

A dynamic range of 168 dB at 1960 MHz and 161 dB at 3500 MHz is claimed to be the highest available for a direct quadrature modulator.

The HMC497LP4 is suitable for applications in software-defined radios where the upconverter must dynamically vary its modulation format depending on changing conditions and requirements. The device's RF output port is single-ended and internally matched to 50 ohm while the LO requires -6 to +6 dBm and can be driven in either differential or single-ended mode.

This device consumes 170 mA at +5.0 V.