EVB72016

433MHz FSK/ASK Transmitter

Evaluation Board Description

3901272016 01

Page 7 of 12

EVB Description

Rev. 004

June/07

3

50

Fig. 6:

Circuit diagram with 50

Ω matching network

3.1

Board Component Values

Part

Size

Value

@ 433.92 MHz

Tolerance

Description

CM1

0805

5.6 pF

±5%

impedance matching capacitor

CM2

0805

10 pF

±5%

impedance matching capacitor

CM3

0805

82 pF

±5%

impedance matching capacitor

LM

0805

33 nH

±5%

impedance matching inductor

LT

0805

33 nH

±5%

output tank inductor

0805

10 pF

±5%

XOSC FSK capacitor (

Δf = ±20 kHz), note 1

0805

18 pF

±5%

CX2

0805

27 pF

±5%

XOSC capacitor (

Δf = ±20 kHz), note 1, only needed for FSK

CCK

0805

18 pF/ 180 pF

±5%

capacitor to control clock voltage swing (CKDIV 0 / 1)

RPS

0805

NIP

±5%

power-select resistor, see data sheet section 4.6 and 4.7

R1

0805

0

Ω

±5%

ASK jumper (for ASK only), see data sheet section 4.7

CB0

1206

220 nF

±20%

de-coupling capacitor

CB1

0805

330 pF

±10%

de-coupling capacitor

XTAL

SMD

6x3.5

13.5600 MHz

±30ppm cal., ±30ppm temp.

fundamental-mode crystal,

CL = 10 pF, C0, max = 5 pF, R1 = 50

Ω

CK

0805

1 nF

±10%

ROI coupling capacitor, only required for

external reference frequency input

Note 1:

depends on crystal parameters, other ∆f values can be selected with other CX1, CX2 values

NIP – not in place, may be used optionally