آر اف (فرکانس رادیویی) و بی‌سیم میکسر آر اف

Product Attributes

Introduction

The RF2051 is a low power, high performance, wideband RF frequency conversion chip with integrated local oscillator (LO) generation and a pair of RF mixers. The RF synthesizer includes an integrated fractional-N phase locked loop with voltage controlled oscillators (VCOs) and dividers to produce a low-phase noise LO signal with a very fine frequency resolution. The buffered LO output drives the built-in RF mixers which convert the signal into the required frequency band. The mixer bias current can be programmed dependent on the required performance and available supply current. The LO generation blocks have been designed to continuously cover the frequency range from 300MHz to 2400MHz. The RF mixers are very broad band and operate from 30MHz to 2500MHz at the input and output, enabling both up and down conversion. An external crystal of between 10MHz and 52MHz or an external reference source of between 10MHz and 104MHz can be used with the RF2051 to accommodate a variety of reference frequency options.

All on-chip registers are controlled through a simple three-wire serial interface. The RF2051 is designed for 2.7V to 3.6V operation for compatibility with portable, battery powered devices. It is available in a plastic 32-pin, 5mmx5mm QFN package.

The RF2051 is a wideband RF frequency converter chip which includes a fractional-N phase-locked loop, a crystal oscillator circuit, a low noise VCO core, a LO signal multiplexer, two buffer circuits and two RF mixers. Synthesizer programming, device configuration and control are achieved through a mixture of hardware and software controls. All on-chip registers are programmed through a simple three-wire serial interface.

Features

• 30MHz to 2.5GHz Frequency Range
• Fractional-N Synthesizer
• Very Fine Frequency Resolution 1.5Hz for 26MHz Reference
• Low Phase Noise VCO
• On-Chip Crystal-Sustaining Circuit With Programmable Loading Capacitors
• Two High-Linearity RF Mixers
• Integrated LO Buffers
• Mixer Input IP3 +18 dBm
• Mixer Bias Adjustable for Low Power Operation
• Full Duplex Mode
• 2.7V to 3.6V Power Supply
• Low Current Consumption 55mA to 75mA at 3V
• 3-Wire Serial Interface

Applications

• CATV Head-Ends
• Digital TV Up/Down Converters
• Digital TV Repeaters
• Multi-Dwelling Units
• Cellular Repeaters
• Frequency Band Shifters
• UHF/VHF Radios
• Diversity Receivers
• Software Defined Radios
• Satellite Communications
• Super-Heterodyne Radios