LMX2512 - National Semiconductor

LMX2512 Frequency Synthesizer System

LMX2502 and LMX2512 are highly integrated, high performance, low power frequency synthesizer systems optimized for Korean PCS and Korean Cellular CDMA (1xRTT, IS-95) mobile handsets. Using a proprietary digital phase locked loop technique, LMX2502 and LMX2512 generate very stable, low noise local oscillator signals for up and down conversion in wireless comm.

Features

n Small Size 5.0 mm X 5.0 mm X 0.75 mm 28-Pin LLP Package n RF Synthesizer System Integrated RF VCO Integrated Loop Filter Low Spurious, Low Phase Noise Fractional-N RF PLL Based on 11-Bit Delta Sigma Modulator 10 kHz Frequency Resolution n IF Synthesizer System Integer-N IF PLL Programmable Charge Pump Current Levels Programmable Frequency n Supports Various Reference Frequencies 19.20/19.68 MHz n Fast Lock Time: 500 µs n Low Current Consumption 17 mA at 2.8 V n 2.7 V to 3.3 V Operation n Digital Filtered Lock Detect Output n Hardware and Software Power Down Control Applications n Korean PCS.