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)
(EN)
