TDA5250D2_07 Datasheet, PDF (59/94 Pages) Infineon Technologies AG – ASK/FSK 868MHz Wireless Transceiver

TDA5250 D2
Version 1.7
Application
D5
FSK-5
D4
FSK-4
D3
FSK-3
D2
FSK-2
D1
FSK-1
D0
FSK-0
4pF
Setting for
0
2pF
negative
0
1pF
frequency
1
500fF
shift: -FSK
1
250fF
0
125fF
(Ctune1)
0
Default values
In case of using the evaluation board, the crystal with its typical parameters (fp=18.08958MHz,
. ^{C1=8fF, C0=2,08pF, CL=12pF) and external capacitors with Cv1=4.7pF, Cv2=1.8pF, Cv3=12pF}
each are used the following default states are set in the device
Table 3-6 Default oscillator settings
Operating state
Frequency
ASK-TX / FSK-RX
868.3 MHz
+FSK-TX / ASK-RX
+50 kHz
-FSK-TX
-50 kHz
3.2.7 Chip and System Tolerances
Quartz: fp=18.08958MHz; C1=8fF; C0=2,08pF; CL=12pF (typical values)
Cv1=4.7pF, Cv2=1.8pF, Cv3=12pF
Table 3-7
Internal Tuning
Part
Frequency set accuracy
Temperature (-40...+85C)
Supply Voltage(2.1...5.5V)
Total
Frequency tolerance
@ 868MHz
+/- 3kHz
+/- 5kHz
+/- 1.5kHz
+/- 9.5kHz
Rel. tolerance
+/- 3.5ppm
+/- 6ppm
+/- 1.5ppm
+/- 11ppm
Table 3-8 Default Setup (without internal tuning & without Pin21 usage)
Part
Frequency tolerance Rel. tolerance
@ 868MHz
Internal capacitors (+/- 10%)
+/- 8kHz
+/- 9ppm
Inductivity of the crystal oscillator
+/- 18kHz
+/- 21ppm
Temperature (-40...+85C)
+/- 5kHz
+/- 6ppm
Supply Voltage (2.1...5.5V)
+/- 1kHz
+/- 1.5ppm
Total
+/- 32kHz
+/- 37.5ppm
Tolerance values in Table 3-8 are valid, if pin 21 is not connected. Establishing the connection to
pin 21 the tolerances increase by +/- 20ppm (internal capacitors), if internal tuning is not used.
Data Sheet
59
2007-02-26