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LMX2581 Datasheet(PDF) 1 Page - Texas Instruments |
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LMX2581 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 56 page Charge Pump 1 DATA CLK LE CE OSCin Vtune CPout LD Output Divider Fractional N Divider 2X MUX Serial Interface Control RFin R Divider RFoutA MUX RFoutB Multiple Core VCO MUX MUX MUXout Vcc Vcc Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LMX2581 SNAS601G – AUGUST 2012 – REVISED SEPTEMBER 2014 LMX2581 Wideband Frequency Synthesizer with Integrated VCO 1 Features 3 Description The LMX2581 is a low noise wideband frequency 1 • Output Frequency from 50 to 3760 MHz synthesizer that integrates a delta-sigma fractional N • Input Clock Frequency up to 900 MHz PLL, multiple core VCO, programmable output • Phase Detector Frequency up to 200 MHz divider, and two differential output buffers. The VCO frequency range is from 1880 to 3760 MHz and can • Supports Fractional and Integer Modes be sent directly to the output buffers or divided down • –229 dBc/Hz Normalized PLL Phase Noise by even values from 2 to 38. Each buffer is capable • –120.8 dBc/Hz Normalized PLL 1/f Noise of output power from -3 to +12 dBm at 2700 MHz. Integrated low noise LDOs are used for superior • –137 dBc/Hz VCO Phase Noise @ 1 MHz offset noise immunity and consistent performance. for a 2.5 GHz Carrier • 100 fs RMS Jitter in Integer Mode This synthesizer is a highly programmable device and it enables the user to optimize its performance. In • Programmable Fractional Modulator Order fractional mode, the denominator and the modulator • Programmable Fractional Denominator order are programmable and can be configured with • Programmable Output Power up to +12 dBm dithering as well. The user also has the ability to directly specify a VCO core or entirely bypass the • Programmable 32 Level Charge Pump Current internal VCO. Finally, many convenient features are • Programmable Option to Use an External VCO included such as power down, Fastlock, auto mute, • Digital Lock Detect and lock detection. All registers can be programmed • 3-Wire Serial Interface and Readback through a simple 3 wire interface and a read back feature is also available. • Single Supply Voltage from 3.15 V to 3.45 V • Supports Logic Levels down to 1.6 V The LMX2581 operates on a single 3.3 V supply and comes in a 32 pin 5.0 mm × 5.0 mm WQFN package. 2 Applications Device Information(1) • Wireless Infrastructure (UMTS, LTE, WiMax, PART NUMBER PACKAGE BODY SIZE (NOM) Multi-Standard Base Stations) LMX2581 WQFN (32) 5.00 mm × 5.00 mm • Broadband Wireless (1) For all available packages, see the orderable addendum at • Test and Measurement the end of the datasheet. • Clock Generation 4 Simplified Schematic 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
Número de pieza similar - LMX2581_14 |
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Descripción similar - LMX2581_14 |
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