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ALN2331 Datasheet(PDF) 3 Page - Advanced Semiconductor Business Inc. |
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ALN2331 Datasheet(HTML) 3 Page - Advanced Semiconductor Business Inc. |
3 / 3 page 3/3 www.asb.co.kr March 2009 plerowTM ALN2331 Internally Matched LNA Module 1) The tantal or MLC (Multi Layer Ceramic) capacitor is optional and for bypassing the AC noise introduced from the DC supply. The capacitance value may be determined by customer’s DC supply status. The ca- pacitor should be placed as close as possible to Vs pin and be connected directly to the ground plane for the best electrical performance. 2) DC blocking capacitors are always necessarily placed at the input and output port for allowing only the RF signal to pass and blocking the DC component in the signal. The DC blocking capacitors are in- cluded inside the ALN module. Therefore, C1 & C2 capacitors may not be necessary, but can be added just in case that the customer wants. The value of C1 & C2 is determined by considering the application frequency. C3 shall be used for matching. Application Circuit Recommended Soldering Reflow Process 20~40 sec 260 °C 200 °C 150 °C 60~180 sec Ramp-up (3˚C/sec) Ramp-down (6 °C/sec) IN OUT Vs Size 25x25mm (for ALN Series – 13x13mm) Evaluation Board Layout + - ALN OUT IN C1 C2 VS Tantal or MLC (Multi Layer Ceramic) Capacitor (Mandatory) C3 = 0.5pF |
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