EFJ-C4005E5B Crystals, Oscillators, Resonators

Resonators are components commonly used in the field of electronics. They are used as frequency-selective components to filter out certain frequencies while allowing other frequencies to pass through. The EFJ-C4005E5B resonator is a popular choice for applications requiring a wide acceptance bandwidth, temperature stability and moderate RF performance. The EFJ-C4005E5B is an SMD (Surface-Mount Device) and has a case thickness of 5.0mm.

The EFJ-C4005E5B resonator is a ceramic surface acoustic wave (SAW) resonator. This type of resonator consists of two electrodes: a drive electrode and a receive electrode. Both electrodes are connected to the processing board and are placed on top of a piezo-electric ceramic substrate. When an RF signal is received in the drive electrode, it is converted into an acoustic wave in the substrate. This acoustic wave propagates across the surface of the substrate and is received by the receive electrode and converted back into an RF signal. By adjusting the size, shape and number of the electrodes, different resonances can be generated. The frequency of the resonator can then be adjusted by adjusting the impedance of the electrodes.

The EFJ-C4005E5B resonator has a nominal resonant frequency of 4005 MHz, with a maximum acceptance bandwidth of ±250 kHz. The average insertion loss of the resonator is 4 dB and the maximum input power is +30 dBm. The temperature stability is ±10 ppm over a temperature range of -40°C to +85°C. The resonator also has a very low phase noise, making it suitable for applications requiring low noise.

Due to its wide acceptance bandwidth, low noise and temperature stability, the EFJ-C4005E5B resonator is commonly used in applications such as filter networks, oscillators, frequency synthesizers and antenna tuners. It is also used in radio transmitters and receivers, radar systems and frequency-selective amplifiers. The resonator is also used in automotive electronics, cellular radio systems and various medical and industrial applications where it is used for frequency tuning and signal filtering.

In conclusion, the EFJ-C4005E5B is an excellent choice for applications requiring a wide acceptance bandwidth, temperature stability and moderate RF performance. Its wide acceptance bandwidth and low noise characteristics make it suitable for a wide range of applications.