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Oscillator IC, Spread Spectrum Modulation, 50kHz to 10MHz, 2.7 V to 5.5 V, TSOT-23-6


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LTC6908IS6-1#PBF   Datasheet
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Product Overview

The LTC6908IS6-1#PBF is a dual Output Oscillator with spread spectrum modulation 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 2.7 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 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 centre 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.
  • Complementary outputs (0/180°)
  • 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)
  • <=1.5% Maximum frequency error (TA = 25°C, V+ = 3V)
  • ±40ppm/°C Temperature stability
  • Fast start-up time (260µs typical, 1MHz)
  • Outputs muted until stable
  • Operates from a single-supply


Power Management, Portable Devices, Signal Processing

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Technical Docs (3)

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