W55RFS27R1B

Publication Release Date:June 8, 2005

- 11 -

Revision A3

4. DESIGN INFORMATION

4.1 W55RFS27R1B Reference Design

4.1.1

W55RFS27R1B Application Circuit

A

11

Wednesday, May 19, 2004

A1

W55RFS27R1B Application Circuit

Size

Document Number

Rev

Date:

Sheet

of

VDD

VDD

VDD

27MHz: C1=15pF,

C2=27pF,

C3=27pF,

L0=1.5uH,

R2=36K

35MHz: C1=10pF,

C2=24pF,

C3=24pF,

L0=1.2uH,

R2=39K

40MHz: C1= 7pF,

C2=16pF,

C3=18pF,

L0=.82uH,

R2=51K

49MHz: C1= 4pF,

C2=16pF,

C3=18pF,

L0=.82uH,

R2=47K

VDDA

ANT1

C2

L0

C1

C4

100nF

C3

R2(1%)

+

C7

10u

R3 16K(1%)

JP2

Output

1

2

3

4

5

6

U1

W55RFS27R1B

C6

47n

+

C5

10u

JP3

MODE0SEL

1

2

3

JP4

MODE1SEL

1

2

3

(* Note: The component values are suitable for a 15-cm antenna. Different antenna might change RSAW (R2).)