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