CML Microcircuits has released the CMX993, a general-purpose I/Q modulator that offers 100MHz to 1GHz operation and is optimized for wide-band noise performance. The device also includes gain control and uncommitted differential amplifiers. Designed for wireless data (digital TV, CATV modulators, ISM transmitters, Wireless LAN, WLL) and two-way radio (APCO P25) applications, the product's I/Q architecture supports a wide range of modulation types.
The quadrature modulator provides translation from baseband I/Q signals to a modulated RF signal. The wideband inputs can be driven single-ended or differentially for optimum performance. The device offers two integrated and matched double-balanced mixers, driven from a buffered quadrature split local oscillator. The 'LO' frequency is divided by either 2 or 4, with the mixers forming an I/Q vector modulator with programmable gain stages, offering 30dB of gain control in 2.5dB steps.
A digital control interface, C-BUS (SPI-compatible interface), allows gain control as well as the power management of individual internal blocks for optimum system performance. The C-BUS interface operates from its own power supply, enabling the CMX993 to be interfaced to baseband devices of differing voltages.
The CMX993 is available now, operates at 3.3V (1.8V I/O) and comes in a 48-pin VQFN package. An evaluation kit (EV9930) is available.
For more information, visit www.cmlmicro.com