516BHA000270BAGR

Function:	Enable/Disable
Current - Supply (Disable) (Max):	22mA
Package / Case:	6-SMD, No Lead
Height:	0.052" (1.33mm)
Size / Dimension:	0.197" L x 0.126" W (5.00mm x 3.20mm)
Current - Supply (Max):	26mA
Operating Temperature:	-40°C ~ 85°C
Frequency Stability:	±20ppm
Voltage - Supply:	3.3V
Output:	LVDS
Series:	Si516
Frequency - Output 4:	--
Frequency - Output 3:	--
Frequency - Output 2:	--
Frequency - Output 1:	148.351648MHz, 148.5MHz
Type:	VCXO
Base Resonator:	Crystal
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Pin Configurable/Selectable Oscillators

Pin Configurable/Selectable Oscillators provide an efficient alternative to conventional oscillators that are used in a wide range of applications, from basic timing applications to RF and microwave applications. This type of oscillators can be configured using various pin configurations, such as pin muxing, voltage control, and frequency selection. This flexibility enables the oscillator to be optimized for different applications, without the need for additional hardware or programming.

516BHA000270BAGR Application Field and Working Principle

The 516BHA000270BAGR is a PLL-based pin selectable/configurable oscillator from SiTime. It is a high performance, miniature clock generator that has both internal pull-up and pull-down resistor network and allows a range of frequency selection from 3kHz to 400MHz. This oscillator is suitable for a wide range of applications, from Automotive, Appliance, Audio, Video, Medical and Aerospace applications.The 516BHA000270BAGR follows a basic 4-step process for frequency selection. At start-up, the oscillator is set to its default frequency of 2.45GHz. A control voltage is then applied to the oscillator’s select pin to select the desired frequency. Finally, a programmable logic device (PLD) is used to program the oscillator’s frequency. The frequency selection can be done either by writing to an external register or by using a “real-time” mode with the CPLD.The working principle of the 516BHA000270BAGR is based on a Phase-Locked Loop (PLL) architecture. The operating frequency of the oscillator is determined by the frequency selection pin. This frequency selection pin is connected to the input of a voltage-controlled oscillator (VCO) whose frequency is controlled by the input voltage. The VCO output is connected to a phase detector, whose output in turn is used to control the charge pump. The output of the charge pump is used to control the loop filter, which determines the signal generated by the VCO. By adjusting the voltage applied to the frequency selection pin, the signal generated by the VCO can be precisely tuned to the desired frequency.

Conclusion

Pin Configurable/Selectable Oscillators such as the 516BHA000270BAGR provide a very efficient and cost-effective alternative to conventional oscillators. They offer the flexibility of being able to be configured with various pin configurations, such as pin muxing, voltage control, and frequency selection, enabling them to be optimized for different applications. The 516BHA000270BAGR uses a PLL-based architecture to achieve precise frequency selection and is suitable for a wide range of applications.

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