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Frequency Hopping with Hittite PLLVCOs Application Note

This application note explains manual VCO calibration techniques to achieve fast frequency hopping (under 1ms) using Analog Devices/Hittite PLLVCOs and look-up tables.

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Overview

This technical application note provides detailed instructions for implementing fast frequency hopping in Hittite (Analog Devices) narrowband, triband, and wideband PLLVCOs. While the integrated auto-calibration routine is standard, manual calibration using Look-Up Tables (LUT) is recommended for time-sensitive applications requiring settling times under 1ms or 100usec. The document outlines two implementation methods: Direct LUT, which stores settings for specific frequencies, and LUT Extrapolation, which uses measured sub-band centers to determine settings. It provides specific register configurations (Reg08h, Reg0Bh), SPI programming sequences, and calculation procedures for diverse parts including the HMC82x, HMC83x, HMC103x, and HMC119x series.

Use Cases

  • Fast frequency hopping communication systems
  • Time-sensitive frequency tuning
  • Software-defined radio (SDR)
  • Radar systems
  • Wireless infrastructure

Topics

Frequency Hopping
PLLVCO
Manual VCO Calibration
Look-Up Table
LUT
Settling Time
HMC832
HMC834
HMC829
Hittite
Analog Devices
SPI

Referenced Parts

HMC1190LP6GE

Analog Devices

Applicable Products

HMC1032

Analog Devices

Wideband PLL+VCO & Clock Generation devices

HMC1033

Analog Devices

Wideband PLL+VCO & Clock Generation devices

HMC1034

Analog Devices

Wideband PLL+VCO & Clock Generation devices

HMC1035

Analog Devices

Wideband PLL+VCO & Clock Generation devices

Frequency Hopping with Hittite PLLVCOs Application Note | Design Resources