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TH7108 Datasheet(PDF) 7 Page - Melexis Microelectronic Systems

Part # TH7108
Description  868/915MHz FSK/FM/ASK Transmitter
PDF  14 Pages
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Manufacturer  MELEXIS [Melexis Microelectronic Systems]
Direct Link  http://www.melexis.com
Logo MELEXIS - Melexis Microelectronic Systems

TH7108 Datasheet(HTML) 7 Page - Melexis Microelectronic Systems

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TH7108
868/915MHz
FSK/FM/ASK Transmitter
3901007108
Page 7 of 14
Data Sheet
Rev. 008
May/03
4
Electrical Characteristics
4.1
Absolute Maximum Ratings
Parameter
Symbol
Condition
Min
Max
Unit
Supply voltage
VCC
0
7.0
V
Input voltage
VIN
-0.3
VCC+0.3
V
Storage temperature
TSTG
-65
150
°C
Junction temperature
TJ
150
°C
Thermal Resistance
RthJA
112
K/W
Power dissipation
Pdiss
0.12
W
VESD1
human body model, 1)
-1.0
+1.0
Electrostatic discharge
VESD2
human body model, 2)
-0.75
+0.75
kV
1) all pins except OUT1, OUT2
2) pins OUT1, OUT2
4.2
Normal Operating Conditions
Parameter
Symbol
Condition
Min
Max
Unit
Supply voltage
VCC
2.2
5.5
V
Operating temperature
TA
-40
85
°C
Input low voltage CMOS
VIL
ENTX, ENCK, DATA pins
0.3*VCC
V
Input high voltage CMOS
VIH
ENTX, ENCK, DATA pins
0.7*VCC
V
XOSC frequency
fref
set by the crystal
26.5
28.75
MHz
890
VCO frequency
fc
fc = 32
• f
ref
TA < 70°C,
VCC
≥ 2.5V
850
920
MHz
Clock frequency
fclk
fc = fref / 8
3.3
3.6
MHz
FSK deviation
∆f
FSK
depends on CX1, CX2 and
crystal parameter
±5
±100
kHz
Data rate FSK
RFSK
NRZ
40
kbit/s
FM deviation
∆f
FM
adjustable with V1 and CX3
±6
kHz
Modulation frequency FM
fmod
5
kHz
Data rate ASK
RASK
NRZ
40
kbit/s
4.3
Crystal Parameters
Parameter
Symbol
Condition
Min
Max
Unit
Crystal frequency
f0
fundamental mode, AT
26.5
28.75
MHz
Load capacitance
CL
10
15
pF
Static capacitance
C0
7
pF
Resonance resistance
R1
40
Ω
Spurious response
aspur
only required for FSK
-10
dB



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