LMX2522LQ1635/NOPB

Overview

The LMX2522LQ1635/NOPB is a PLLatinum dual frequency synthesizer system with integrated VCOs, designed for RF and GPS applications. It operates within an output frequency range of 1.61962 GHz to 1.64962 GHz. The device supports input frequencies between 19.2 MHz and 19.68 MHz. Powered by a supply voltage ranging from 2.7 V to 3.3 V, it consumes approximately 17 mA of operating current. The component is housed in a small 5.0 mm x 5.0 mm x 0.75 mm 28-pin WQFN package. It is qualified under AEC-Q100 standards and functions within a temperature range of -30°C to +85°C.

Feature Summary

• Dual frequency synthesizer architecture with integrated RF and GPS VCOs
• AEC-Q100 automotive qualification for reliable operation
• Compact 28-pin WQFN surface-mount packaging

Applications

• RF synthesizer systems
• GPS receiver modules
• Automotive electronic systems requiring AEC-Q100 compliance

Procurement Notes

Verify the specific suffix 'NOPB' to ensure lead-free compliance and confirm the exact frequency variant 'LQ1635' matches the required 1.61962–1.64962 GHz output range. Cross-reference the manufacturer part number against distributor catalogs to distinguish between obsolete original listings and active replacement stock. Ensure the package type corresponds to the 28-WQFN (5x5) specification for proper PCB footprint compatibility.

Selection Notes

Select this component when a dual-channel synthesizer with integrated VCOs is required for GPS and RF bands. The AEC-Q100 qualification makes it suitable for automotive environments. Consider the fixed output frequency range of 1.61962–1.64962 GHz; if different frequencies are needed, other variants in the LMX2522 series must be evaluated. The 28-pin WQFN package dictates specific layout constraints for thermal and electrical performance.

Part Context

This part belongs to Texas Instruments' PLLatinum family, which provides high-performance frequency synthesis solutions. The LMX2522 model specifically integrates two VCOs to support complex multi-band applications. The 'LQ1635' designation indicates a factory-set output frequency optimized for specific cellular or GPS bands, distinguishing it from programmable wide-range synthesizers.

Replacement Considerations

The LMX2522LQ1635 is listed as obsolete. The direct substitute is the LMX2522LQ1635/NOPB, which maintains identical functionality and specifications while ensuring lead-free compliance.