厂商：Freescale
类别：16位单片机
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特点RF Frequency Range: 800MHz to 2.7GHzUltra Wide Dynamic Range: 80dB Over Full Frequency Range and Over TemperatureWide Power Supply Range: 2.7V to 5.25VLow Supply Current: 14.7mA at 3VShutdown Current: 0.2μA8-Lead MS0P Package典型应用典型应用描述The LT?5504 is an 800MHz to 2700MHz monolithic integrated measuring receiver, capable of detecting a wide dynamic range RF signal from –75dBm to +5dBm. The logarithm of the RF signal is precisely converted into a linear DC voltage. The LT5504 consists of RF/IF limiters, an LO buffer amplifier, a limiting mixer, a 3rd-order 450MHz integrated low pass filter, RF/IF detectors and an output interface. The ultrawide dynamic range is achieved by simultaneously measuring the RF signal and a down-converted IF signal obtained using the on-chip mixer and an external local oscillator. The RF- and IF-detected signals are summed to generate an accurate linear DC voltage proportional to the input RF voltage (or power) in dB. The output is buffered with a low output impedance driver.