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SX1781 Datasheet PLL Frequency Synthesizer

Manufacturer: SEMTECH

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General Description

The SX1781 is a high-performance low phase noise integer-N frequency synthesizer for wireless communications applications.

The circuit embeds a fully integrated PLL (including VCO tank and loop filter), complementary output buffers The divider and power-down settings are programmable via an SPI interface.

A Lock Detector pin linked to a squelch function have been designed to ease the software development.

Overview

SX1781 PLL Frequency Synthesizer with Integrated VCO ADVANCED COMMUNICATIONS & SENSING FINAL DATASHEET.

Key Features

  • Frequency range:1200 to 1400 MHz Frequency step: 250 kHz min. Phase noise: -85 dBc/Hz @ 10 kHz offset Reference spurs: -67 dBc Hopping time: 350 µs max. Operating voltage: 3.0 - 3.6V Programmable Output Power: up to +5 dBm Integrated VCO and loop filter SPI-bus interface Lock Detect output and squelch Ultra-low power sleep mode Complementary RF outputs Temperature range: -40 to +85°C 4 x 4 mm MLPQ16 package Pb-free and RoHS compliant.

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