The RO2101 is a SAW (Surface Acoustic Wave) resonator. SAW resonators are passive electronic components used to create stable and accurate oscillators and filters in radio frequency (RF) applications. They provide a high Q-factor and low insertion loss, making them suitable for frequency control and signal filtering.

Applications:

• Remote keyless entry (RKE) systems: Used in car key fobs and other RKE devices to generate a stable carrier frequency for transmitting control signals.
• Wireless sensors: Provides a stable frequency reference in wireless sensor nodes.
• Garage door openers: Generates the RF signal for transmitting the open/close command.
• Security systems: Used in wireless security systems to create a reliable communication link.
• Tire Pressure Monitoring Systems (TPMS): Provides a frequency source within the TPMS sensor.
• Short-range wireless communication: Used in various short-range wireless communication devices.

Features:

• SAW resonator: Provides a high Q-factor and low insertion loss.
• Fundamental mode operation: Operates at the fundamental frequency.
• Small size: Allows for easy integration into compact devices.
• Stable frequency: Provides a stable and accurate frequency reference.
• Rugged construction: Designed for reliable operation in harsh environments.

Benefits:

• Accurate frequency control: Provides a precise and stable frequency reference.
• Improved system performance: High Q-factor and low insertion loss enhance system performance.
• Simplified design: Reduces the complexity of oscillator and filter circuits.
• Reduced component count: Integration of resonant element simplifies board layout.
• Cost-effective solution: Provides a cost-efficient means of frequency control.

Additional Details:

The RO2101 typically comes in a small surface mount package. The resonant frequency is determined by the design of the SAW structure. The datasheet provides detailed information on electrical characteristics, impedance, and frequency stability. Proper impedance matching is essential for optimal performance.