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.
Phone: 02 9016 2876
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