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MICRF004 Arkusz danych(PDF) 13 Page - Micrel Semiconductor

Numer części MICRF004
Szczegółowy opis  QwikRadio??Low-Power VHF Receiver Advance Information
PDF  16 Pages
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Producent  MICREL [Micrel Semiconductor]
Strona internetowa  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MICRF004 Arkusz danych(HTML) 13 Page - Micrel Semiconductor

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February 9, 2000
13
MICRF004/RF044
MICRF004/RF044
Micrel
SEL0
SEL0
SWEN
VSSRF
REFOSC
VSSRF
SEL1
ANT
CAGC
VDDRF
WAKEB
VDDBB
SHUT
CTH
DO
NC
VSSBB
C2
2.2µF
4.85MHz
(ceramic resonator)
U1 MICRF004
0.47µF
Optional Filter
33pf, 33nH
C4
L1
+5V
Supply
Input
C1
4.7µF
A0
VDD
A1
VT
A2
OSC1
A3
OSC2
A4
DIN
A5
D11
A6
D10
A7
D9
U2 HT-12D
VSS
D8
R1
68k
R2
1k
Code Bit 0
Code Bit 1
RF
(Analog)
Ground
Baseband
(Digital)
Ground
Figure 7a. 150MHz, 1kb/s On-Off Keyed Receiver/Decoder
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Figure 7b. Bill of Material
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Figure 7c. Component Vendors
150MHz Receiver/Decoder Application
Figure 7a illustrates a typical application for the MICRF004
VHF Receiver IC. This receiver operates continuously (not
duty cycled) in sweep mode, and features 6-bit address
decoding and two output code bits.
Operation in this example is at 150MHz, and may be custom-
ized by selection of the appropriate frequency reference
(CR1), and adjustment of the antenna length. The value of C4
would also change if the optional input filter is used. Changes
from the 1kb/s data rate may require a change in the value of
R1. A bill of materials accompanies the schematic.



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