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MICRF002 Datasheet(PDF) 14 Page - Micrel Semiconductor

Part # MICRF002
Description  300-440MHz QwikRadio짰 ASK Receiver
PDF  17 Pages
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MICRF002 Datasheet(HTML) 14 Page - Micrel Semiconductor

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Micrel, Inc.
MICRF002/RF022
July 2008
14
M9999-070808
Applications Example
315MHz Receiver/Decoder Application
Figure 7 illustrates a typical application for the MICRF002
UHF 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 315MHz, and may be
customized by selection of the appropriate frequency
reference (Y1), 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.
SEL0
SEL0
SWEN
VSSRF
REFOSC
VSSRF
SEL1
ANT
CAGC
VDDRF
WAKEB
VDDBB
SHUT
CTH
DO
NC
VSSBB
C2
2.2µF
4.8970MHz
Y1
U1 MICRF002
4.7µF
Optional Filter
8.2pF, 16.6nH
pcb foil inductor
1in of 30mil trace
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
0.4
λ monopole
antenna (11.6in)
6-bit
address
Figure 7. 315MHz, 1kbps On-Off Keyed Recwiver/Decoder
Bill of Materials
Item
Part Number
Manufacturer
Description
Qty.
C1
Vishay
(1)
4.7µF, Dipped Tantalum Capacitor
1
C2
Vishay
(1)
2.2µF, Dipped Tantalum Capacitor
1
C3
Vishay
(1)
4.7µF, Dipped Tantalum Capacitor
1
C4
Vishay
(1)
8.2pF, COG Ceramic Capacitor
1
CR1
CSA6.00MG
Murata
(2)
6.00MHz, Ceramic Resonator
1
D1
SSF-LX100LID
Lumex
(3)
RED LED
1
R1
68k, 1/4W, 5%
1
R2
Vishay
(1)
1k, 1/4W, 5%
1
U1
MICRF002
Micrel, Inc.
(4)
300-440MHz QwikRadio
® ASK Receiver
1
U2
HT-12D
Holtek
(5)
Logic Decoder
1
Notes:
1. Vishay Tel: (203) 268-6261
2. Murata Tel: (800) 241-6574, Fx: (770) 436-3030
3. Lumex Tel: (800) 278-5666, Fx: (847) 359-8904
5. Micrel, Inc.: (408) 944-0800
5. Holtek Tel: (408) 894-9046, Fx: (408) 894-0838



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