Frequency Stability:	±10ppm
Current - Supply (Disable) (Max):	35mA
Height - Seated (Max):	0.032" (0.80mm)
Size / Dimension:	0.197" L x 0.126" W (5.00mm x 3.20mm)
Package / Case:	6-SMD, No Lead
Mounting Type:	Surface Mount
Ratings:	--
Current - Supply (Max):	55mA
Operating Temperature:	-40°C ~ 85°C
Absolute Pull Range (APR):	--
Series:	SiT9120
Voltage - Supply:	2.25 V ~ 3.63 V
Output:	LVDS
Function:	Standby (Power Down)
Frequency:	166.666666MHz
Type:	XO (Standard)
Base Resonator:	MEMS
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Oscillators: SIT9120AI-2CF-XXS166.666666Y

Introduction

Oscillators are important components used in a wide range of communications, astronomy, meteorology, avionics and navigation equipment. Oscillators measure the time difference between two given signals. The SIT9120AI-2CF-XXS166.666666Y is a high-performance voltage-controlled oscillator. It utilizes a double crystal to reach a precise frequency and perform more stable operations.

Application Field and Working Principle

The SIT9120AI-2CF-XXS166.666666Y is a voltage-controlled oscilaltor(VCO) which provide frequencies over a wide range. This VCO is most suitable in multi-band transmitters, signal tone measurements, ultra-wideband communications systems, wide-band satellite navigation systems, and precision test & measurement oscillator applications.The operating principle of the SIT9120AI-2CF-XXS166.666666Y is based on its double crystal. This double crystal VCO is composed of two large diameter high Q crystals with a high precision etching aluminium resonator which enables stable frequency control over its wide operating range. Its high Q quartz crystals combined with its unique comb structure effectively reduces any 1/f noise generated by the oscillator, allowing consistent and stable performance.The SIT9120AI-2CF-XXS166.666666Y also features a high linearity voltage control input port which provides an ultra wide tuning range with an output power level of 0 dBm into a 50 ohm load. This VCO also has an inductor in its design that improves its phase noise performance. The combination of the double crystal and the linearity of the VCO enables a wide output frequency range from 2～300 MHz. The SIT9120AI-2CF-XXS166.666666Y is also highly stable with a temperature stability of 0.5ppm/℃ over -40° to 105°C temperature range.The SIT9120AI-2CF-XXS166.666666Y is powered with a 5V supply voltage which is further regulated by the internal voltage regulator, allowing a single voltage supply operation. The high performance of this VCO makes it ideal for radio communication systems and satellite navigation systems.

Conclusion

The SIT9120AI-2CF-XXS166.666666Y is a high performance voltage-controlled oscillator with stable frequency control over its wide operating range. It features a unique double crystal design with a precise etching aluminium resonator for improved stability and a linearly varying voltage control input port for an ultra wide tuning range. Its excellent temperature stability enables it to be used in a wide range of communication, navigation and radio applications.

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