The LTC6908HS6-1#PBF 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)
时钟与计时, 便携式器材, 电源管理
(EN)
