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RF83 Datasheet(PDF) 10 Page - List of Unclassifed Manufacturers |
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10 / 22 page -10- RF83//RF83C/RF83L/RF83CL ASK/OOK Receiver V2.0 Tel: +86‐755‐82973805 Fax: +86‐755‐82973550 E‐mail: sales@hoperf.com http://www.hoperf.com 12.Functional Diagram Figure 1. Block Diagram 13.Applications Information and Functional Description Refer to figure 1 “Block Diagram”. Identified in the block diagram are the four sections of the IC: UHF Downconverter, OOK Demodulator, Reference and Control, and Wakeup. Also shown in the figure are two capacitors (CTH, CAGC) and one timing component, usually a crystal or ceramic resonator. With the exception of a supply decoupling capacitor, and antenna impedance matching network, these are the only external components needed by the RF83/RF83C to assemble a complete UHF receiver. For optimal performance is highly recommended that the RF83/RF83C is impedance matched to the antenna, the matching network will add an additional two or three components. For RF83, Four control inputs are shown in the block diagram: SEL0, SEL1, SWEN, and SHUT. Using these logic inputs, the user can control the operating mode and selectable features of the IC. These inputs are CMOS compatible, and are internally pulled-up. IF Bandpass Filter Roll- off response of the IF Filter is 5th order, while the demodulator data filter exhibits a 2nd order response. 13.1. Design Steps The following steps are the basic design steps for using the RF83/RF83C receiver: 1) Select the operating mode (sweep or fixed, For RF83) 2) Select the reference oscillator 3) Select the CTH capacitor 4) Select the CAGC capacitor 5) Select the demodulator filter bandwidth |
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