402F27112IAR

Series:	402
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	MHz Crystal
Frequency:	27.12MHz
Frequency Stability:	±20ppm
Frequency Tolerance:	±10ppm
Load Capacitance:	10pF
ESR (Equivalent Series Resistance):	100 Ohms
Operating Mode:	Fundamental
Operating Temperature:	-40°C ~ 85°C
Ratings:	--
Mounting Type:	Surface Mount
Package / Case:	4-SMD, No Lead
Size / Dimension:	0.079" L x 0.063" W (2.00mm x 1.60mm)
Height - Seated (Max):	0.022" (0.55mm)

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Crystals - 402F27112IAR Application Field and Working Principle

Crystals are an important electronic component used to generate a precise frequency for diverse applications. The 402F27112IAR is a 4-pad through-hole crystal produced by Rakon, suitable for various high-frequency applications globally. The device is hermetically packaged and its small size makes it suitable for space-constrained products like smartphones and tablets.The 402F27112IAR utilizes AT-cut crystals. These crystals have a rectangular shape and require a cut along the Y-axis of the crystal lattice to reduce the acoustic velocity. This allows the crystal to reach a frequency of 27.12MHz with low minimum resonance impedance. The device also features up to 234ps of overall variation of frequency (OOF) in extreme temperatures ranging from -55°C to +125°C.The figure of merit (FOM) of the 402F27112IAR is 0.75 which is considered good. Its higher FOM values mean that the device can oscillate under a lower level of external parallel capacitance, saving money and space for the next-generation applications. Additionally, the load capacitance range of the device is 20pF-47pF with an operating temperature range of -55°C to +125°C.Apart from their use in oscillator design, 402F27112IAR crystals can also be used in precise frequency generation and measurement. AT-cut crystals provide precise frequency timing signals used to control the operations of other electronic components. The precise frequency generated from the AT-cut crystal allows accurate control of components with precise pulse widths without the need to use power-hungry buses or motors.In addition, the 402F27112IAR can also be used in digital filters. Filters are used to reduce noise and accept or reject signals based on their frequency. With the402F27112IAR, both low-pass and band-pass filters can be designed with their precise frequency and impedance characteristics. The device’s small size also allows it to be used in portable applications without taking up too much space.The 402F27112IAR can also be used in phase-locked loops (PLLs). PLLs are used to generate precise frequencies from a square-wave input. The device’s high precision allows a wide range of frequencies to be generated from the PLLs, with minimal frequency division and a low phase noise.Overall, the 402F27112IAR is a versatile crystal that offers many advantages for oscillator, filter, and PLL design. Its small size allows it to be used in space-constrained applications, while its good FOM allows for low external parallel capacitance. Its precise frequency output also enables accurate control of components with precise pulse widths, noise reduction, and precise frequency generation in PLLs.

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