Product Summary

The LMX1601TMX/NOPB is a pllatinum low cost dual frequency synthesizer. The LMX1601TMX/NOPB 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 LMX1601TMX/NOPB contains two dual modulus prescalers, four programmable counters, two phase detectors and two selectable gain charge pumps necessary to provide the control voltage for two external loop filters and VCO loops. Digital filtered lock detects for both PLLs are included. Data is transferred into the LMX1601TMX/NOPB via a MICROWIR serial interface (Data, Clock, LE).

Parametrics

LMX1601TMX/NOPB absolute maximum ratings: (1)Power Supply Voltage VCCMAIN: -0.3 to 6.5 V; (2)Power Supply Voltage VCCAUX: -0.3 to 6.5 V; (3)Voltage on any pin with GND=0V VI: -0.3 to VCC + 0.3 V; (4)Storage Temperature Range TS: -65 to +150 ℃; (5)Lead Temp. (solder 4 sec)TL: +260 ℃; (6)ESD-Human Body Model: 2000 eV.

Features

LMX1601TMX/NOPB features: (1)VCC = 2.7V to 3.6V operation; (2)Low current consumption: 4 mA @ 3V (typ)for LMX1601 5 mA @ 3V (typ)for LMX1600 or LMX1602; (3)PLL Powerdowmode: ICC = 1 μA typical; (4)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; (5)Digital Filtered Lock Detects.

Diagrams

LMX1601TMX/NOPB pin connection

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