ADL5380是一款宽带正交
I/Q demodulator，涵盖从400 MHz到6 GHz的RF/IF输入频率范围。在900 MHz时，其噪声系数(NF)为10.9 dB，IP1dB为11.6 dBm，三阶交调截点(IIP3)为29.7 dBm；具有出色的动态范围，适合要求苛刻的基础设施直接变频应用。差分RF输入提供功能良好的50 Ω宽带输入阻抗，最好采用1:1巴伦驱动以实现最佳性能。
The demodulation accuracy is excellent, with amplitude and phase balance of approximately 0.07 dB and 0.2°, respectively. The demodulated in-phase (I) and quadrature (Q) differential outputs are fully buffered to provide approximately 7 dB of voltage conversion gain. The buffered baseband output drives a 2 V p-p differential signal to a load of 200 Ω.
The fully balanced design greatly reduces the effects of second-order distortion. Leakage from LO port to RF port is less than −50 dBm. The typical value of the differential DC offset voltage at the I and Q outputs is less than 20 mV. These factors give the device excellent IIP2 characteristics above 65 dBm.
ADL5380 supply current can be adjusted by placing an external resistor between the ADJ pin and the positive supply VS (to increase supply current and improve IIP3) or ground (to reduce supply current at the expense of IIP3 performance) using a single 4.75 V to 5.25 V supply.
ADL5380 are manufactured using Analog Devices' advanced silicon-germanium bipolar process and are available in a 24-pin, exposed pad LFCSP package.
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宽带无线和WiMAX
宽带无线和WiMAX