一、Characteristics
The 315MHz 3030 surface acoustic wave resonator (R315 resonator for short) is used to suppress higher harmonics, image information, emission leakage signals and various parasitic clutter interference. The R315 resonator can filter amplitude-frequency and phase-frequency characteristics with any desired accuracy, which is difficult to accomplish with other filters. The main feature of R315 resonator is that it is flexible in design, compatible with analog and digital circuits, and can realize a variety of complex functions. And the installation is simpler, and the installation is simpler and the volume is smaller than the traditional ceramic resonator. The biggest drawback of the R315 resonator is that the bandwidth is too narrow (tens of KHZ), resulting in extremely slow download speeds.
The main characteristics of the resonator are large design flexibility, compatible with analog circuits and digital circuits, small group delay time, small deviation, good frequency selectivity, small group delay time, small input and output impedance error, small transmission loss, good anti-electromagnetic interference (EMI) performance, high reliability, small size, light weight, high device integration, cheap and other advantages. The R315 has a center frequency of 315MHz, a frequency tolerance of ±75KHz, and a package form of 3030. With small insertion loss (≤1.0dB), temperature (temperature: -25℃--+60℃; Storage temperature: -45℃--+85℃) Good characteristics.
R315 resonator
Item
| Minimum | Typical | Maximum | Unit |
Center Frequency
| 314.925 | 315.000 | 315.075 | MHz |
| Insertion Loss | - | 1.0 | 2.0 | dB |
| Quality Factor | Unloaded Q | - | 12588 | - | - |
| 50Ω Loaded Q | - | 1369 | - | - |
| Absolute Value during the First Year | - | ≤10 | - | ppm/y |
| DC Insulation Resistance between Any Two Pins | 1.0 | - | - | MΩ |
RF Equivalent RLC Model | Motional Resistance | - | 12.2 | - | Ω |
| Motional Inductance | - | 77.6 | - | µH |
| Motional Capacitance | - | 3.29 | - | fF |
| Pin 1 to Pin 2 Static Capacitance | 2.3 | 2.5 | 2.8 | pF |
| Operation Temperature | -40 | - | +85 | ℃ |
| Package style | SMD 3030 |
二、Package Dimension
| Pin | Configuration |
| 2 | Input |
| 5 | Output |
| 1、3、4、6 | Case Ground |
三、Typical Frequency Response
Typical Frequency Response
四、Application & attention
◆ The center frequency (315MHz) of the R315 surface acoustic wave resonator was measured at a temperature of + 25±2 ° C in a 50Ω test system with an insertion loss of 1.4dB.
◆ Frequency aging refers to the change in the center frequency (315MHz) over time and is measured at +65 ° C (or above) for a long time. Typically, the degree of aging is highest in the first year after production and gradually decreases in subsequent years.
◆ Target temperature refers to the temperature measured from the lowest frequency of 314.925MHz to 315MHz and then to the highest frequency of 315.075MHz.
◆ The nominal frequency at any temperature can be calculated by :f = f0 [1-FTC (T0-TC)*2].
R315 resonator is widely used in test remote control, wireless transmitter module, wireless smart socket, smart door lock, wireless doorbell, wireless alarm, wireless communication system and remote transmitter. When used, the welding temperature should not be too high, and the time should not be too long. If reflow welding is used, reference temperature is recommended, and wave crest welding is not recommended. Products should be stored in the ambient temperature of -10℃~40℃, relative humidity is not more than 80%, the surrounding environment is not acidic, alkaline and other harmful gases in the warehouse. Do not soak when cleaning, it is recommended to wipe with alcohol.
The company has a variety of package sizes of R315 sound meter resonators, R433 sound meter resonators and other frequencies for users to choose, accept customized sound meter resonators of various frequencies, for the conventional use of frequency and package, can be timely delivery.
