EVB72006 Datasheet, PDF (7/12 Pages) Melexis Microelectronic Systems – 315MHz FSK/ASK Transmitter Evaluation Board Description

EVB72006
315MHz FSK/ASK Transmitter
Evaluation Board Description
3 50Ω Connector Board Circuit Diagram
Fig. 6: Circuit diagram with 50 Ω matching network
3.1 Board Component Values
Part
Size
Value
@ 315 MHz
Tolerance
Description
CM1
CM2
CM3
LM
LT
CX1_{_FSK}
CX1_{_ASK}
CX2
CCK
RPS
R1
CB0
CB1
XTAL
CK
0805
0805
0805
0805
0805
0805
0805
0805
0805
0805
0805
1206
0805
SMD
6x3.5
0805
10 pF
±5%
15 pF
±5%
82 pF
±5%
47 nH
±5%
33 nH
±5%
10 pF
±5%
18 pF
±5%
220 pF
±5%
39 pF/ 220 pF
±5%
NIP
±5%
0Ω
±5%
220 nF
±20%
330 pF
±10%
9.84375 MHz
±30ppm cal., ±30ppm temp.
1 nF
±10%
impedance matching capacitor
impedance matching capacitor
impedance matching capacitor
impedance matching inductor
output tank inductor
XOSC FSK capacitor (Δf = ±20 kHz), note 1
XOSC ASK capacitor, trimmed to f_C, note 1
XOSC capacitor (Δf = ±20 kHz), note 1, only needed for FSK
capacitor to control clock voltage swing (CKDIV 0 / 1)
power-select resistor, see data sheet section 4.6 and 4.7
ASK jumper (for ASK only), see data sheet section 4.7
de-coupling capacitor
de-coupling capacitor
fundamental-mode crystal,
C_L = 12 pF, C_{0, max} = 7 pF, R₁ = 60 Ω
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
39012 72006 01
Rev. 004
Page 7 of 12
EVB Description
Dec/07