Part # AN1739 datasheet

Part Manufacturer: ST Microelectronics

ST Microelectronics

Part Description: AN LNA OPTIMIZED AT 2.45 GHZ USING THE SI MMIC SMA540B


Part Details:

AN1739 APPLICATION NOTE AN LNA OPTIMIZED AT 2.45 GHz USING THE Si MMIC SMA540B R. Mazzurco, N. Micalizzi, G. Privitera Table 1: Data for Bleutooth/WLAN Applications (f = 2.450 GHz) Parameters Value Unit Vcc 3.3 V Icc 5 mA Noise Figure 2.2 dB Gain 13.9 dB RLin > 10 dB RLout > 10 dB Isolation 19 dB OP1dB 5.9 dBm IIP3 1.3 dBm The SMA540B is a product of the SMA Family (Silicon MMIC Amplifiers), it is an NPN transistorintegrating a current mirror as biasing. In this way the IC (collector current) can be controlled by settingthe current at Bias pin according to IC = 10 * IBIAS. The IBIAS current is easily adjusted using an externalresistor (R1). The voltage supply is 3.3V. Figure 1: Schematic of SMA540B application board Vcc 21 + C1 1u C4 C5 R1 100p L1 10n 5,6k 6n8 C3 L2 100p 4n3 C6


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AN1739.pdf Datasheet