353LB5A327R

Frequency Stability:	±25ppm
Current - Supply (Disable) (Max):	--
Height - Seated (Max):	0.055" (1.40mm)
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):	25mA
Operating Temperature:	-10°C ~ 60°C
Series:	353
Voltage - Supply:	3.3V
Output:	HCMOS
Function:	Enable/Disable
Frequency:	32.768MHz
Type:	VCXO
Base Resonator:	Crystal
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Oscillators: 353LB5A327R application field and working principle

Oscillators are circuits designed to generate signals at a predetermined frequency over a wide range of applications, ranging from clock generation to sound processing. The 353LB5A327R is a prime example, a temperature-controlled crystal oscillator (TCXO) designed to operate over the frequency range of 10 MHz to 40 MHz. It can generate a continuous stream of stable oscillations, even under extreme temperatures ranging from –20 to +60 °C.

Application field

The 353LB5A327R is a highly-sensitive device used in many types of electronics, from consumer devices to large systems. Its high precision makes it ideal for devices demanding accurate timing, because it can generate stable and repeatable frequencies. As such, it is used in a variety of applications, from digital audio systems and medical devices, to automated test systems and radio communication systems.

Structure

The 353LB5A327R is a 4-pin device, with pins 1 and 2 for the control signal and pins 3 and 4 for the output signal. Inside, it is composed of 6 components: a quartz crystal, a transimpedance amplifier, a variable control circuit, a temperature sensor, a voltage to frequency converter, and an amplifier.

Quartz crystal

The quartz crystal is the most vital part of the oscillator. It is a tiny crystal made of quartz that vibrates in the presence of a voltage, creating a distinct frequency. Its frequency range varies depending on its design and the surrounding temperatures.

Transimpedance amplifier

The transimpedance amplifier is an essential circuit; it amplifies the voltage input an reduce noise interference. This is important for the 354LB5A327R, since its frequency range is very sensitive to noise.

Variable control circuit

The variable control circuit is responsible for maintaining the frequency of the 352LB5A327R. It is composed of a temperature sensor, which monitors the internal temperature, and a voltage-to-frequency converter, which converts the variables to a frequency. Together, they keep the oscillator running with the same frequency regardless of temperature fluctuations.

Working principle

The 353LB5A327R uses a voltage to drive a quartz crystal. This in turn produces a stable and repeatable frequency. This frequency is then amplified by the transimpedance amplifier, and then fed to the variable control circuit. The variable control circuit then adjusts the frequency according to the given temperature, which ensures a steady output frequency.

Conclusion

The 353LB5A327R stands as a testament to modern electronics, providing a stable and repeatable frequency under a wide range of temperatures. Its superb accuracy and performance make it a popular choice for many applications, from medical devices to sound processing. With its ability to generate a precise frequency with minimal drift, the 354LB5A327R is sure to remain a reliable choice for many years to come.

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