TH7122 Datasheet, PDF (37/44 Pages) Melexis Microelectronic Systems – 27 to 930MHz FSK/FM/ASK Transceiver

TH7122
27 to 930MHz
FSK/FM/ASK Transceiver
7.7 ASK Test Circuit Component List (Fig. 17)
Part
C0
C1
C2
C5
C6
CB0
CB1
CB2
CB5
CB6
CB7
CF1
CF2
CPS
CX1
CRX0
CTX0
CTX4
R1
R2
RB1
RF
RPS
L0
Size
0603
0603
0603
0603
0603
1210
0603
0603
0603
0603
0603
0603
0603
0603
0805
0603
0603
0603
0603
0603
0603
0603
0603
0603
Value @
315 MHz
1.8 pF
3.9 pF
1.5 pF
1.5 nF
100 nF
10 μF
10 nF
330 pF
100 nF
100 pF
100 nF
100 pF
39 pF
1 nF
18 pF
100 pF
10 pF
12 pF
100 kΩ
680 kΩ
100 Ω
33 kΩ
18 kΩ
47 nH
Value @
434 MHz
2.2 pF
4.7 pF
1.0 pF
1.5 nF
100 nF
10 μF
10 nF
330 pF
100 nF
100 pF
100 nF
100 pF
39 pF
1 nF
18 pF
100 pF
10 pF
4.7 pF
100 kΩ
680 kΩ
100 Ω
33 kΩ
33 kΩ
27 nH
Value @
915 MHz
1.8 pF
1 pF
1.5 pF
1.5 nF
100 nF
10 μF
10 nF
330 pF
100 nF
100 pF
100 nF
100 pF
39 pF
1 nF
18 pF
10 pF
10 pF
1.8 pF
100 kΩ
680 kΩ
100 Ω
33 kΩ
43 kΩ
3.9 nH
L1
0603
33 nH
15 nH
4.7 nH
LTX0
0603
15 nH
15 nH
3.9 nH
XTAL
HC49
SMD
7x5
8.0000 MHz
±20ppm cal., ±20ppm temp.
CERFIL
SMD
3.45x3.1
SFECF10M7HA00
B_3dB = 180 kHz
Note: - Antenna matching network according to paragraph 9
Tol.
±5%
±5%
±5%
±10%
±10%
±20%
±10%
±10%
±10%
±10%
±10%
±10%
±5%
±10%
±5%
±5%
±5%
±5%
±5%
±5%
±5%
±5%
±5%
±5%
±5%
±5%
Description
VCO tank capacitor
LNA output tank capacitor
MIX input matching capacitor
RSSI output low pass capacitor
PKDET capacitor
de-coupling capacitor
de-coupling capacitor
de-coupling capacitor
de-coupling capacitor
de-coupling capacitor
de-coupling capacitor
loop filter capacitor
loop filter capacitor
power-select capacitor
RO capacitor
RX coupling capacitor
TX coupling capacitor
TX impedance matching capacitor
PKDET resistor
PKDET resistor
protection resistor
loop filter resistor
power-select resistor
VCO tank inductor
from Würth-Elektronik (WE-KI series)
or equivalent part
LNA output tank inductor
from Würth-Elektronik (WE-KI series)
or equivalent part
impedance matching inductor
from Würth-Elektronik (WE-KI series)
or equivalent part
fundamental-mode crystal,
C_load = 10 pF to 15pF, C_{0, max} = 7 pF,
R_{m, max} = 70 Ω
ceramic filter from Murata,
or equivalent part
39010 07122
Rev. 008
Page 37 of 44
Data Sheet
June/07