MICRF007BM Просмотр технического описания (PDF) - Micrel
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MICRF007BM Datasheet PDF : 13 Pages
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MICRF007
Application Example
315MHz Receiver/Decoder Application
Figure 10 illustrates a typical application for the MICRF007
UHF Receiver IC. This receiver operates continuously (not
duty cycled) in fixed-mode, and features 6-bit address decod-
ing and two output code bits.
Micrel
Operation in this example is at 315MHz, and may be cus-
tomized by selection of the appropriate frequency reference
(Y1), and adjustment of the antenna length. Changes from
the 1Kbps data rate may require a change in the value of R1.
A bill of materials accompanies the schematic.
+5V
Supply Input
1/4 monopole
antenna (23.1cm)
C4
1.8pF
L1
56nH
C1
4.7µF
C5
100µF
RF Baseband
(Analog) (Digital)
Ground Ground
C6
100pF
C2
39nF
U1 MICRF007
VSS REFOSC
Y1
4.8970MHz
ANT CAGC
VDD
CTH
SHUT
DO
R3
100k
C3
2.2µF
6-bit
address
U2 HT-12D
A0
VDD
A1
VT
A2 OSC1
A3 OSC2
A4
DIN
A5
D11
A6
D10
A7
D9
VSS
D8
R2
1k
R1
68k
Code Bit 0
Code Bit 1
Figure 10. 315MHz, 1Kbps On-Off Keyed Receiver with Decoder
Bill of Materials
Item
Part Number
C1
GRM21BF51A475ZA01L
C2
VJ0603Y393KXXA
C3
GRM188R61A225XE348
C4
GRM1885C1H1R8CZ01B
C5
GRM188R71E104KA01B
C6
GRM1885C1H101JA01B
D1
SSF-LX100LID
L1
0603CS-56NX-B
R1
CRCW06036812F
R2
CRCW06031001F
R3
CRCW06031003F
U1
MICRF007BM
U2
HT-12D
Y1
AB-4.8970MHZ-20-D
Notes:
1. Vishay, tel. (203) 268-6261
2. Lumex, tel. (800) 278-5666
3. Micrel Inc., tel (408) 944-0800
4. Holteck, tel (408) 894-9046
5. Abracon, tel. (949) 448-7070
6. Coilcraft, tel. (510) 814-8954
7. Murata, tel (408) 397-1284
February 17, 2005
Manufacturer
Murata(7)
Vishay(1)
Murata(7)
Murata(7)
Murata(7)
Murata(7)
Lumex(2)
Coilcraft(6)
Vishay(1)
Vishay(1)
Vishay(1)
Micrel(3)
Holtek(4)
Abracon(5)
11
Description
4.7µF Y5V
39nF
2.2µF X5R
1.8pF COG ceramic capacitor
100nF capacitor
100pF capacitor
red LED
56mH wire wound, Q=38
68k; 1/4W; 5%
1k; 1/4W; 5%
100k
UHF Reciever
Logic decoder
4.8970MHz crystal
Qty.
1
1
1
1
1
1
1
1
1
1
1
1
1
1
M9999-021705
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