W55RFS27R1B Datasheet, PDF (11/15 Pages) Winbond – SUPER-REGENERATION RF RECEIVER

W55RFS27R1B
4. DESIGN INFORMATION
4.1 W55RFS27R1B Reference Design
4.1.1 W55RFS27R1B Application Circuit
R2(1%)
VDD
R3 ^16K(1%)
C7 +
10u
C4
100nF
ANT1
U1
C1
W55RFS27R1B
JP2
1
2
3
4
5
6
Output
VDDA
+
C6
C5
47n
10u
L0
C2
C3
VDD
JP3
1
2
3
MODE0SEL
VDD
JP4
1
2
3
MODE1SEL
27MHz: C1=15pF,
35MHz: C1=10pF,
40MHz: C1= 7pF,
49MHz: C1= 4pF,
C2=27pF,
C2=24pF,
C2=16pF,
C2=16pF,
C3=27pF,
C3=24pF,
C3=18pF,
C3=18pF,
L0=1.5uH,
L0=1.2uH,
L0=.82uH,
L0=.82uH,
R2=36K
R2=39K
R2=51K
R2=47K
Size
A
Date:
Document Number
W55RFS27R1B Application Circuit
Wednesday, May 19, 2004
Sheet
1
of
Rev
A1
1
(* Note: The component values are suitable for a 15-cm antenna. Different antenna might change RSAW (R2).)
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Publication Release Date:June 8, 2005
Revision A3