SMV1253-040LF Discrete Semiconductor Products

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The SMV1253-040LF, a part of the Variable Capacitance (Varicaps or Varactors) Diode family, is a low frequency voltage-variable capacitor. It is characterized by its high quality factor, wide capacitive range, low ESR and very low capacitive change rate. With its excellent performance characteristics, the SMV1253-040LF is suitable for a wide range of applications from general purpose capacitors to high-frequency filter and tuned item components.

The working principle of the SMV1253-040LF is based on the modification of the junction capacitance when the voltage bias is changed. The junction capacitance is the capacitance value of the device when the biased voltage is zero. The junction capacitance varies radically with a small bias voltage change, depending upon the semiconductor material.

The SMV1253-040LF is applied in mobile terminals, DC/DC converters, Switched Mode Power Supplies (SMPS), Voltage Controlled Oscillators (VCOs), voltage-controlled filters and several other tuning applications. Also, it is suitable for voltage dependent or voltage tunable impedances, antennas and antennas tuners, such as Frequency Hopping System (FHS).

In the SMV1253-040LF diodes, the capacitive range is determined by the metal semiconductor structure and its dimensions. This metal semiconductor structure is accessible by a Gate contact connected to the the controlling voltage V_G. It usually works in the depletion mode, in which the junction capacitance decreases if the Gate voltage increases. There are also depletion-enhancement mode, MOS varactors, in which the junction capacitance increases if V_G increases. Despite their differences in capacitance variation with respect to V_G, the depletion and enhancement modes of operation will both result in a wide tuning range.

Additionally, the series of SMV varactors is designated for the use in low frequency applications. Therefore, the capacitance range of these components covers low frequency values (below 10MHz). These diodes are based on planar technology and have a ceramic package, making them suitable for operations at high temperatures and in high ambient temperatures. Moreover, they have a low equivalent series resistance (ESR) and low parasitic package inductance.

The SMV1253-040LF has a wide range of applications, particularly its use in coupling, tuning and filtering. It is used to control the attenuation, coupling and feedback of the circuit, which is an essential part of the design of these functions. Other applications include frequency generation, pulse shaping, and oscillator circuits. Moreover, this type of varactor can also be used for delay lines, antenna tuning and stabilization of micro-power sources.

In conclusion, the SMV1253-040LF is a versatile and reliable component in the field of Varicaps or Varactors. It is designed for use in low frequency applications, has a wide capacitive range, low ESR and low capacitive change rate. It is suitable for use in voltage-controlled oscillators, voltage dependent filter circuits, antennas and antennas tuners. The SMV1253-040LF can be used for coupling, tuning and filtering, as well as frequency generation and pulse shaping circuits.

The specific data is subject to PDF, and the above content is for reference