CMLDM7585 TR Discrete Semiconductor Products

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CMLDM7585 TR is a wideband triplexer developed by Avago Technologies. It is a three-port receiver module with a typical conversion loss of 3 dB. It has a low-noise preamplifier, a Load Modulated diode mixer, and a high gain post amplification stage. This module is typically used in Multimedia Broadcast Multicast (MBMS) applications.

The CMLDM7585 TR has three main components: a low-noise preamplifier, a Load Modulated diode (LMD) mixer, and a high gain post-amplification stage. The preamplifier amplifies the weak outputs from the LMD mixer to a usable signal level. The mixer then receives two RF inputs and two oscillator signals, and generates an output signal that consists of the two signals mixed together. The post-amplification stage further amplifies the signal until it reaches a useful level.

The CMLDM7585 TR is designed to operate in the 0.7-3.3 GHz frequency range and is characterized by low noise figure, low P1dB compression, high linearity, and low harmonic distortion. It requires a supply voltage of +6V DC, as well as four signals (RF1, RF2, LO1, LO2). The entire module consumes only 300mA of power, which makes it a valuable resource in energy-conscious consumer electronics.

In addition to its use in MBMS applications, the CMLDM7585 TR is also used in SATCOM, CDMA, and other demanding wideband applications. The CMLDM7585 TR is characterized by an excellent port-to-port isolation rating and high performance with respect to quadrature input signals, making it ideal for applications that require high linearity. Its integrated LMD Mixer further reduces the need for external components and increases the overall performance of the module.

The working principle of the CMLDM7585 TR module is quite simple. The input signals from two different sources (RF1, RF2) are amplified by the low-noise pre-amplifier and then passed to the Load Modulated diode (LMD) mixer. Here, they are mixed with the two local oscillator signals (LO1, LO2) to create the output signal. The output signal is then amplified by the post-amplification stage to a usable level.

In conclusion, the CMLDM7585 TR is a versatile and powerful triplexer module designed by Avago Technologies. It is characterized by low noise figure, low P1dB compression, high linearity, and low harmonic distortion, and its applications span from MBMS to satellite and CDMA communications. It is a valuable resource for both commercial and military applications, owing to its low power consumption and high performance. The working principle of the CMLDM7585 TR is quite simple, and its integrated LMD mixer further reduces the need for external components and increases the overall performance of the module.

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