Overview

Description

The IDT F1370 is a highly linear complex IF digital pre-distortion (DPD) demodulator with built-in digital step attenuator (DSA) and single-pole-double-throw switches (SP2Ts).  It receives the signal coming out of the PA so that the I&Q data at Baseband can be pre-distorted before being sent to the Tx DAC to counteract the distortion inherent in the downstream PA.  The signal coupled from the PA is adjusted via a DSA to a lower level and then sub-sampled at an IF frequency of ~200 MHz which necessitates the need for a highly linear demodulator to downmix to quadrature IF from the Transmit frequency.   By sampling IF_I and IF_Q independently and then digitally combining these signals, an effective doubling of the sample rate can be achieved.   Any distortion in this path will degrade the performance of the DPD algorithm.  By utilizing an ultra-linear demodulator with integrated DSA such as the IDT F1320, the ACLR and/or power consumption of the full Tx system can be improved significantly.

Features

  • Wide flat performance IF BW
  • Wide RF and LO BWs (~ 1.6 GHz)
  • Ideal for Multi-Carrier Systems
  • Drives ADC directly
  • Ultra linear +41 dBm IP3O
  • Low Noise Figure
  • Excellent ACLR performance
  • 200 Ω output impedance
  • Fully integrated DPD demodulator
  • 6x6 36 pin package
  • Standby Mode with Fast Recovery
  • ICC:  275 mA

Documentation

Title Type Date
PDF1.37 MB
Datasheet
PDF2.19 MB
Guide
PDF39 KB
Product Change Notice
PDF35 KB
Product Change Notice
PDF33 KB
Product Change Notice

Design & Development

Boards & Kits

Boards & Kits

Models

Models

Title Type Date
Model - S-parameter

Support

Videos & Training

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.

Additional benefits of using IDT's RF solutions include: enable screen networks with minimal power consumption; allow scaling from macrocells to microcells using the same device with reduced voltage, reduced current, or both; improves reliability by replacing gallium arsenite with silicon; improves data throughput by optimizing signal-to-noise performance and overall dynamic range; tolerates higher operating temperature than competitive devices.

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.