概览

The F0448 is a 3.3GHz to 4.2GHz Dual RF digital variable gain amplifier (DVGA) designed for use in receivers. This Dual RF DVGA provides two independent receiver paths each with 13dB typical maximum gain and 6dB noise figure designed to operate with a single +5V supply. For each path, gain control is split into 3 separate attenuators; DSA0 a single 6dB step using a single control pin, DSA1 a 23dB SPI-controlled gain adjustment in 1dB steps, and DSA2 includes 18dB attenuation in 6dB steps controlled using two control pins. F0448 offers +37dBm nominal output IP3 using 220mA total ICC. This device is packaged in a 6 x 6 mm, 36-QFN with 50Ω single-ended RF input and RF output impedances for ease of integration.
 
  • RF frequency range: 3.3GHz to 4.2GHz
  • Dual path RF amp and DSAs for Diversity / MIMO receivers
  • < 2dB overshoot between DSA transitions
  • 13dB typical max gain at 3.6GHz
  • DSA0: Single 6dB coarse step
  • DSA1: 23dB total gain range in 1dB steps
  • DSA2: 18dB gain range in 6dB steps
  • +37dBm OIP3 at 3.6GHz
  • 6dB noise figure at 3.6GHz
  • +5V supply voltage
  • ICC = 220mA
  • Independent standby: 7mA standby current
  • SPI interface for DSA1
  • 1-bit control for DSA0
  • 2-bit control for DSA2
  • 50Ω input and output impedance
  • Broadband, internally matched
  • Temperature range: -40°C to  +105°C
  • 6 x 6 mm, 36-QFN package

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IDT RF Product Benefits Overview

Hello, my name is Dan Terlep. I'm a Product Definer in IDT's RF group. What I'm going to talk about are some of the customer benefits of IDT's technical innovations used in RF products. These are unique innovations that differentiate our products from competitive parts. Up to 10x improvement in RF performance can be obtained when using these devices in your designs. This technology is highly desired by equipment vendors and is protected by patents.

Glitch-free technology essentially eliminates the transient overshoot that can occur during mSv attenuation state transitions of standard digital step attenuators. Flat-noise technology maintains near constant noise performance [inaudible 00:00:48] reduced in our variable gain amplifiers, thus optimizing system level signal-to-noise performance. Zero-distortion technology practically eliminates intermodulation distortion in our RF mixers and amplifiers, enhancing the system's quality of service. Kz refers to constant impedance technology, which has implemented a new line of RF switches that allows 'hot switching' in TDD systems.

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Note that IDT's RF cards are used by all major cellular 3G and 4G equipment manufacturers for systems deployed all over the world. IDT's advanced RF portfolio using these technologies includes: mixers, digital step attenuators, RF switches, variable gain amplifiers, and modulators. These are silicon monolithic devices offered in QFN packages.

In summary, IDT's RF portfolio replaces gallium arsenite parts, results in higher reliability, provides better signal-to-noise performance, faster settling times, eliminates glitching and third-order intermodulation distortion, reduces DC power consumption, and operates at higher temperatures. Thank you for your time, and please make sure to visit IDT's RF website for a more complete look at our product portfolio. For additional information and support, please use the email shown.