LTC6908IDCB-1#PBF

LINEAR TECHNOLOGY  LTC6908IDCB-1#PBF  芯片, 2相振荡器, 带SSFM, 6DFN

The is an easy-to-use Precision Oscillator 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°

.

One external resistor sets the frequency

.

Outputs muted until stable

.

±10% Frequency spreading

.

±40ppm/°C Temperature stability

.

260µs Typical fast start-up time 1MHz

.

400µA Typical supply current V+=5V, 50kHz