LTC6908

PRODUCTION

Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation

Data Sheet (Rev. C) Product Selection Table
Viewing:

Overview

  • LTC6908-1: Complementary Outputs (0°/180°)
  • LTC6908-2: Quadrature Outputs (0°/90°)
  • 50kHz to 10MHz Frequency Range
  • One External Resistor Sets the Frequency
  • Optional Spread Spectrum Frequency Modulation for Improved EMC Performance
  • ±10% Frequency Spreading
  • 400µA Supply Current Typical (V+ = 5V, 50kHz)
  • Frequency Error ≤1.5% Max (TA = 25°C, V+ = 3V)
  • ±40ppm/°C Temperature Stability
  • Fast Start-Up Time: 260µs Typical (1MHz)
  • Outputs Muted Until Stable
  • Operates from a Single 2.7V to 5.5V Supply
  • Available in Low Profile (1mm) ThinSOT and DFN (2mm × 3mm) Packages
  • AEC-Q100 Qualified for Automotive Applications

The LTC6908 is an easy-to-use precision oscillator that provides 2-outputs, shifted by either 180° or 90°. The oscillator frequency is programmed by a single external resistor (RSET) and spread spectrum frequency modulation (SSFM) can be activated for improved electromagnetic compatibility (EMC) performance.

The LTC6908 operates with a single 2.7V to 5.5V supply and provides rail-to-rail, 50% duty cycle square wave outputs. A single resistor from 10k to 2M is used to select an oscillator frequency from 50kHz to 10MHz (5V supply). The oscillator can be easily programmed using the simple formula outlined below:

fOUT =10MHz • 10k/RSET

The LTC6908’s SSFM capability modulates the output frequency by a pseudorandom noise (PRN) signal to decrease the peak electromagnetic radiation level and improve EMC performance. The amount of frequency spreading is fixed at ±10% of the center frequency. When SSFM is enabled, the rate of modulation is selected by the user. The three possible modulation rates are fOUT/16, fOUT/32 and fOUT/64.

Applications

  • Switching Power Supply Clock Reference
  • Portable and Battery-Powered Equipment
  • Precision Programmable Oscillator
  • Charge Pump Driver
LTC6908
Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation
LTC6908-1-6908-2 Application Circuit LTC6908-1-6908-2 Pin configuration LTC6908-1-6908-2 Pin Configuration LTC6908-1-6908-2 Performance Graph
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project
Ask a Question

Documentation

Data Sheet 1

Reliability Data 1

User Guide 3

Technical Articles 5

Learn More
Add to myAnalog

Add media to the Resources section of myAnalog, to an existing project or to a new project.

Create New Project

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Hardware Ecosystem

Parts Product Life Cycle Description
Oscillators 1
LTC6909
PRODUCTION 1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation
Modal heading
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project

Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTC6908-1
  • LTC6908-2

OscCalc Silicon Oscillator Selection & Synthesis Tool

OscCalc is a quick and easy tool to help you find the right silicon oscillator for your application.

Open Tool
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
DC2073B-J

LTC6908-1 Silicon Oscillator Demo Board

Buy Now View Details

Product Details

DC2073B demo board features ADI's SOT23 packaged silicon oscillators. The DC2073B demo board is available in eleven different options; DC2073B-A through DC2073B-K. These eleven options provide for the evaluation of resistor-set oscillator ICs and fixed frequency ICs.

eval board
schematic 2
DC2073B-K

LTC6908-2 Silicon Oscillator Demo Board

Buy Now View Details

Product Details

DC2073B demo board features ADI's SOT23 packaged silicon oscillators. The DC2073B demo board is available in eleven different options: DC2073B-A through DC2073B-K. These eleven options provide for the evaluation of resistor-set oscillator ICs and fixed frequency ICs.

DC2073B-J
LTC6908-1 Silicon Oscillator Demo Board
DC2073B - Schematic
DC2073B-K
LTC6908-2 Silicon Oscillator Demo Board
DC2073B - Schematic

Latest Discussions

No discussions on LTC6908-1 yet. Have something to say?

Start a Discussion on EngineerZone®

Recently Viewed