LMX2522 - Texas Instruments

LMX2522 Frequency Synthesizer System

LMX2522 and LMX2532 are highly integrated, high performance, low power frequency synthesizer systems optimized for Korean PCS (K-PCS) with GPS and Korean Cellular (K-Cellular) with GPS, CDMA (1xRTT, IS-95) mobile handsets. Using a proprietary digital phase locked loop technique, LMX2522 and LMX2532 generate very stable, low noise local oscillator signals for.

Features

1
•23 Small Size
  – Small 5.0 mm x 5.0 mm x 0.75 mm 28-Pin WQFN Package
• RF/GPS Synthesizer System
  – Integrated RF VCO
  – Integrated GPS VCO
  – Integrated Loop Filter
  – Low Spurious, Low Phase Noise FractionalN RF PLL Based on 11-bit Delta Sigma Modulator
  – 10 kHz Frequency Resolution
• IF Synthesizer System
  – Integer-N IF PLL
  – Programmable Charge Pump Current Levels
  – Programmable Frequencies
• Supports Various Reference Oscillator Frequencies
  – 19.20/19.68 MHz
• Fast Lock Time: 500 µs
• Low Current Consumption
  – 17 mA at 2.8 V
• 2.7 V to 3.3 V Operation
• Digital Filtered Lock Detect Output
•.