一、Characteristics
433.920MHz surface acoustic wave resonator, referred to as R433 sound meter resonator. The R433 has a center frequency of 433.920MHz, a frequency tolerance of ±75MHz, and a package form of SMD 3mm*7mm. R433 3070 Sound meter resonator has small insertion loss (≤1.2dB), temperature (temperature: -20℃--+70℃; Storage temperature: -45℃--+85℃) good performance, excitation power is 10 μW ~ 100 μW, electrostatic capacitance is 7.0pF Max, aging rate ≤10ppm/year(the first year), High integration, easy welding, good weldability, light weight, good performance, high stability, cheap and easier to install than the traditional ceramic resonator, smaller volume and so on. The biggest disadvantage of the R433 sound meter resonator is that the bandwidth is too narrow (tens of KHZ), resulting in extremely slow download speed.
433.920MHz surface acoustic wave resonator
1、Maximum Ratings
Rating | Value | Units |
CW RF Power Dissipation | + 10 | dBm |
DC Voltage Between Any Two Pin | ± 30 | VDC |
Operating Temperature Range | - 20 ~ +70 | ℃ |
2、Electronic Characteristics
| Characteristic | Sym | Min | Typ | Max | Units |
Center Frequency (+25℃） | Absolute Frequency | fC | 433.845 | 433.920 | 433.995 | MHz |
Tolerance from 433.920MHz
| △fC |
| ± 75
|
| kHz |
| Insertion Loss | IL |
| 1.2 | 2.0 | dB |
Quality Factor | Unloaded Q | QU |
| 10850 |
|
|
| 50Ω Loaded Q | QL |
| 950 |
|
|
Temperature Stability | Turnover Temperature | TO | 5 | 20 | 35 | ℃ |
| Turnover Frequency | fO |
| fc |
| kHz |
Frequency Temperature Coefficient
| FTC |
| 0.037 |
| ppm/℃2 |
| Frequency Aging Absolute Value during the First Year | |fA| |
| ≤10 |
| ppm/yr |
| DC Insulation Resistance Between Any Two Pins |
| 1.0 |
|
| MΩ |
RF Equivalent RLC Model | Motional Resistance | RM |
| 14.8 | 20 | Ω |
| Motional inductance | LM |
| 58.957 |
| µH |
| Motional Capacitance | CM |
| 2.282 |
| fF |
| Pin 1 to Pin 2 Static Capacitance | CO |
| 2.0 |
| pF |
二、Package Dimension
| Pin | Configuration |
| 1 | Input |
| 2 | Case Ground |
| 3 | Output |
三、Marking
Marking
|
| R | SAW Resonator |
| 433 | Center Frequency |
四、Typical Frequency Response
Typical Frequency Response
五、Application & attention
◆ The center frequency of the R433 surface acoustic wave resonator (433.920MHz) is in a 50Ω test system, and the insertion loss of the resonator is measured to be 1.2dB at the test temperature of +25 ° C ±2 °C.
◆ Frequency aging refers to the change in the center frequency (433.920MHz) over time and is measured at +65 ° C (or above) for long periods of time. Typically, the degree of aging is highest in the first year after production and gradually decreases in subsequent years.
◆ arget temperature refers to the temperature measured from the lowest frequency 433.845MHz to 433.920MHz and then to the highest frequency 433.950MHz。
◆ The nominal frequency at any temperature can be calculated by :f = f0 [1-FTC (T0-TC)*2].
Because 433.920MHz 3070 package resonator is widely used in the test remote control, wireless transmitter module, wireless wisdom 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 R433 sound meter resonator, R315 sound meter resonator and other frequencies of various package sizes of the sound surface resonator. For the frequency and package of routine use, timely delivery can be achieved.
