LTC6431-15 TesT circuiT a PORT C7 C1 C5 C6 INPUT 1000pF 60pF 1nF 0.1µF VCC = 5V L1 C3 R1 IN 560nH 1000pF 350Ω GND V CC DNC DNC DNC DNC OUT PORT OPTIONAL DNC GND OUTPUT STABILITY DNC T_DIODE NETWORK DNC DNC LTC6431-15 DNC DNC DNC DNC DNC GND V CC DNC DNC DNC 643115 F01 Figure 1. Application, Test Circuit AoperaTion The LTC6431-15 is a highly linear, fixed-gain amplifier that cally improved linearity. Shunt and series feedback are is configured to operate single ended. Its core signal path added to lower the input/output impedance and match them consists of a single amplifier stage minimizing stability is- simultaneously to the 50Ω source and load. Meanwhile, sues. The input is a Darlington pair for high input impedance an internal bias controller optimizes the internal operating and high current gain. Additional circuit enhancements point for peak linearity over environmental changes. This increase the output impedance and minimize the effects circuit architecture provides low noise, excellent RF power of internal Miller capacitance. handling capability and wide bandwidth—characteristics The LTC6431-15 starts with a classic RF gain-block topol- that are desirable for IF signal chain applications. ogy but adds additional enhancements to achieve dramati- 643115f 10 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information DC Electrical Characteristics AC Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Test Circuit A Operation Applications Information S Parameters Package Description Related Parts
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