Optimised for use in GPS L1, Galileo and GLONASS applications such as cellular phones and portable navigational devices, they require only two external components to complete the board level design and include an optional resistor for logic enabled shutdown. Both devices operate from a 1.6 to 3.3V supply and are fully specified over the -40 to +85°C extended temperature range.
The units have a low 0.75dB noise figure to improve receive sensitivity over discrete and highly integrated cmos solutions. They have a typical 4mA operating supply current to provide longer battery life and an optional logic enabled shutdown mode has been implemented to reduce supply current to less than 1µA. For customers who wish to ensure a higher level of receive performance in the face of in band and out of band blockers, the high linearity MAX2688 is said to provide approximately 6dBm better in band and out of band IIP3 for a 4mA extra supply current.
