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LMX2542 - Cellular and GPS Frequency Synthesizer System

General Description

LMX2542 is a highly integrated, high performance, low power frequency synthesizer system optimized for CellularCDMA 1xRTT and IS-95 mobile handsets and data systems with GPS capabilities.

Key Features

  • low current consumption: 22 mA at 2.8V. LMX2542 is available in a 28-Pin Leadless Leadframe Package (LLP). Features n Small Size 5.0 mm x 5.0 mm x 0.75 mm 28-Pin LLP n RF Synthesizer System Integrated RF VCO Integrated Loop Filter Low Spurious, Low Phase Noise Fractional-N RF PLL Based on 11-Bit ∆Σ modulator 5 kHz Frequency Resolution Cellular-CDMA LO: 2105.28 MHz to 2155.14 MHz (Requires an External LO /2 Circuit) GPS LO: 2087.73 MHz (Requires an External LO /1.5 Circuit) n IF Synthesizer Syst.

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The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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LMX2542 PLLatinum Cellular and GPS Frequency Synthesizer System with Integrated VCOs May 2004 LMX2542 PLLatinumTM Cellular and GPS Frequency Synthesizer System with Integrated VCO General Description LMX2542 is a highly integrated, high performance, low power frequency synthesizer system optimized for CellularCDMA 1xRTT and IS-95 mobile handsets and data systems with GPS capabilities. Using a proprietary digital phase locked loop technique, LMX2542 provides very stable, low noise local oscillator (LO) signals for up and down conversion in wireless communications devices. LMX2542 includes a Voltage Controlled Oscillator (VCO) for both the Cellular-CDMA and GPS frequency bands, a loop filter, and a Fractional-N RF PLL based on a Delta Sigma (∆Σ) modulator.