SX1781集成電路（IC）的時(shí)鐘發(fā)生器PLL頻率合成器規(guī)格書(shū)PDF中文資料

SX1781屬于集成電路（IC）的時(shí)鐘發(fā)生器PLL頻率合成器。由Semtech Corporation制造生產(chǎn)的SX1781時(shí)鐘發(fā)生器，PLL，頻率合成器時(shí)鐘發(fā)生器、PLL 和頻率合成器集成電路 (IC) 可為邏輯器件提供參考信號(hào)的穩(wěn)定定時(shí)脈沖，這些器件包括計(jì)算機(jī)、微控制器、數(shù)據(jù)通信系統(tǒng)和圖形/視頻發(fā)生器。這些集成電路可能包括緩沖器、驅(qū)動(dòng)器、分頻器、倍頻器、多路復(fù)用器、合成器、扇出分配器和預(yù)分頻器。

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.

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