MAX2742ECM+

RF Front End (LNA + PA) Overview

The MAX2742ECM+ is a single-chip GPS RF front-end receiver utilizing RF CMOS technology. It integrates a low-noise amplifier, mixer, IF section, digital sampler, and local oscillator synthesizer. The device operates at the standard GPS frequency of 1575.42 MHz with a typical noise figure of 4.5 dB. It consumes 32 mW at +2.4 V and supports supply voltages from +2.4 V to +3.6 V. Packaged in a 48-LQFP (7x7 mm) exposed pad format, it functions within an extended temperature range of -40°C to +85°C.

RF Front End (LNA + PA) Feature Summary

• Complete single-chip integration eliminating external SAW or discrete IF filters
• Supports both single-ended and differential outputs at 1.023 MHz
• Very low power consumption for portable applications
• Extended industrial temperature range capability

RF Front End (LNA + PA) Applications

• In-Vehicle Navigation Systems (IVNS)
• Location-Based Services including PDAs and accessories
• Geographical Information Systems (GISs)
• Telematics for vehicle and asset tracking
• Emergency Response Systems

RF Front End (LNA + PA) Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package marking matches the 48-LQFP specification. Check date codes against current production status as this model may be discontinued. Ensure storage conditions comply with moisture sensitivity level requirements prior to soldering. Request original datasheets to validate pinout and electrical characteristics before integration.

RF Front End (LNA + PA) Selection Notes

Select this component for designs requiring minimal external filtering and low power consumption. Compare performance metrics such as noise figure and current draw against alternative GPS front-ends. Evaluate board space constraints given the integrated nature of the LNA and synthesizer. Consider thermal management capabilities within the specified operating temperature range. Verify compatibility with existing antenna interfaces and output configurations.

RF Front End (LNA + PA) Part Context

The MAX2742 series represents Maxim Integrated's solution for compact GPS receivers. It succeeds earlier models by integrating functions previously handled by discrete components. This approach reduces bill-of-materials costs and simplifies layout complexity. The device is part of a broader family of RF front-ends designed for global navigation satellite systems.

RF Front End (LNA + PA) Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult official Analog Devices or Maxim Integrated resources for cross-reference data. Verify pin-to-pin compatibility and electrical specifications if considering alternatives.