SMV1129-079LF

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Voltage-variable and temperature-compensated capacitance diodes, also known as Varicaps or Varactors, have been part of the electronics landscape for decades. The SMV1129-079LF from NXP is a GaAs varactor diode designed as an ultra-thin capacitor and as an attenuator in wireless telecom applications. These devices offer a wide voltage range with low noise, high linearity and low cost.

The device is principally used as a voltage-variable capacitor in DC blocking caps, vibrator charging, or antenna tuning applications. The principle of operation of Varctors or Varicaps is based on the capacitance produced by an electric field applied to a junction diode. When a reverse voltage is applied to the diode, the depletion width of the diode increases and the capacitance decreases. On the other hand, when a forward voltage is applied to the diode, the depletion width decreases and the capacitance increases.

The SMV1129-079LF varactor diode is a gallium arsenide Varactor with a capacitance range from 3.9 to 4.8 pF. It is provided in a micro SMV surface Mount plastic package and has an operating voltage from 0.32V to 1.5V. The maximum reverse voltage is 75V and the recommended junction temperature is -40°C to +125°C. It is rated for a junction temperature maximum of 150 °C, solder temperature of 260°C, and its maximum power dissipation is 250mW. The SMV1129-079LF also features a low reverse current of 5nA at 75V reverse voltage and a low leakage current of 2μA at 2V reverse voltage.

The maximum capacitance range of the SMV1129-079LF is 4.8pF and is used in a wide range of applications including DC blocking caps, antenna tuning, and oscillator circuits. The device can also be used as an attenuator in wireless telecom applications. The varactor diode is used in the high-frequency band for tuning antennas for wireless communication applications. It is also used in VCOs (Voltage Controlled Oscillator) for signal processing and signal modulation applications.

The SMV1129-079LF is a high performance Varactor with a wide voltage range and very low noise. It is suitable for many applications where low power consumption, high linearity, and low cost are important. The device is used in cell phone base station antenna tuning and signal processing, as well as for antenna tuning for wireless communication applications.

The SMV1129-079LF is a versatile and reliable device with a wide range of applications. The device features a low reverse current, a low leakage current, a wide voltage range, low noise, and high linearity, making it a great choice for many electronic applications.

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