EFCH1950TCD1 Filters

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The EFCH1950TCD1 is a high-performance surface acoustic wave filter (SAW) used in a variety of applications. The device has a small form factor, low cost, and is designed to provide superior performance for tight control and implementation in consumer electronics, communications, instrumentation and industrial applications. The wafer-level filter package is designed to be small and highly reliable, with no need for tuning. The device has emerged as the preferred choice for applications that require accurate frequency selection.

The use of the EFCH1950TCD1 is broad, from providing uniform selectivity in radio frequency (RF) modules to circuit isolation in medical device applications. The device facilitates improved performance through a low insertion loss and high pre-selection of signal paths. As such, the wafer-level tuning capabilities allow for better isolation and return loss in a variety of signal paths. The small size of the SAW filters makes them a popular choice in space-constrained applications.

The working principle of the EFCH1950TCD1 is based on the concept of SAW devices. In a SAW device, mechanical waves are generated by thin film interdigital transducers which are composed of a piezoelectric substrate, metal electrodes, and electrodes which act as a transducer. At certain frequencies, mechanical waves are created at the surface of the substrate and will travel at the same speed along it for a predetermined distance. The amplitude of the wave will be reduced due to the effect of diffraction. This is the basis of the frequency-selective properties of the EFCH1950TCD1.

In addition, this device utilizes single-tap delay lines, which are alternating metal electrodes arranged in such a way that they create mechanical waves across the surface of the substrate. The interference of the waves will cause them to cancel each other out, creating a band-pass filter effect. Additionally, this type of device can be tuned at the wafer-level, allowing for improved accuracy and response. The single-tap delay line ensures that the filter will have a high out-of-band rejection.

The EFCH1950TCD1 is designed to provide highly accurate frequency selection in a variety of applications. It is a cost-effective solution for providing superior performance and reliable signal paths in a range of applications, including RF modules, medical device applications, instrumentation, and a variety of communication devices. The small form factor and superior isolation and return loss properties make the device an attractive choice for space constrained applications. The wafer-level tuning capabilities provide the perfect solution for applications that require precision in frequency selection.

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