RF83 Datasheet, PDF (10/22 Pages) List of Unclassifed Manufacturers – 300~440MHz ASK/OOK Receiver

RF83//RF83C/RF83L/RF83CL ASK/OOK Receiver V2.0
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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