LMX1600 - National Semiconductor

LMX1600 Low Cost Dual Frequency Synthesizer

The LMX1600/01/02 is part of a family of monolithic integrated dual frequency synthesizers designed to be used in a local oscillator subsystem for a radio transceiver. It is fabricated using National’s 0.5u ABiC V silicon BiCMOS process. The LMX1600/01/02 contains two dual modulus prescalers, four programmable counters, two phase detectors and two selectable.

Features

n VCC = 2.7V to 3.6V operation n Low current consumption: 4 mA @ 3V (typ) for LMX1601 5 mA @ 3V (typ) for LMX1600 or LMX1602 n PLL Powerdown mode: ICC = 1 µA typical n Dual modulus prescaler: — 2 GHz/500 MHz option: (Main) 32/33 (Aux) 8/9 — 1.1 GHz/500 MHz option: (Main) 16/17 (Aux) 8/9 — 1.1 GHz/1.1 GHz option: (Main) 16/17 (Aux) 16/17 n Digital Filtered Lock Detects General Description The LMX1600/01/02 is part of a family of monolithic integrated dual frequency synthesizers designed to be used in a local oscillator subsystem for a radio transceiver. It is fabricated using National’s 0.5u A.