TDA5251F1 Datasheet, PDF (56/88 Pages) Infineon Technologies AG – ASK/FSK 315MHz Wireless Transceiver

TDA5251 F1
Version 1.0
Confidential
Application
Default values
In case of using the evaluation board, the crystal with its typical parameters (fp=13.125MHz,
. ^{C1=6.5fF, C0=1.8pF, CL=20pF) and external capacitors with Cv1=27pF, Cv2=1.0pF, Cv3=15pF}
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
315.0 MHz
+FSK-TX / ASK-RX
+30 kHz
-FSK-TX
-30 kHz
3.2.7 Chip and System Tolerances
Quartz: fp=13.125MHz; C1=6.5fF; C0=1,8pF; CL=20pF (typical values)
Cv1=27pF, Cv2=1.0pF, Cv3=15pF
Table 3-7
Internal Tuning
Part
Frequency set accuracy
Temperature (-40...+85C)
Supply Voltage(2.1...5.5V)
Total
Frequency tolerance
@ 315MHz
+/- 1.3kHz
+/- 2.5kHz
+/- 0.6kHz
+/- 4.4kHz
Rel. tolerance
+/- 4ppm
+/- 8ppm
+/- 2ppm
+/- 14ppm
Table 3-8 Default Setup (without internal tuning & without Pin21 usage)
Part
Frequency tolerance Rel. tolerance
@ 315MHz
Internal capacitors (+/- 10%)
+/-2.2kHz
+/- 7ppm
Inductivity of the crystal oscillator
+/- 2.5kHz
+/-8ppm
Temperature (-40...+85C)
+/- 2.5kHz
+/- 8ppm
Supply Voltage (2.1...5.5V)
+/- 0.6kHz
+/- 2ppm
Total
+/- 7.8kHz
+/- 25ppm
Tolerance values in Table 3-8 are valid, if pin 21 is not connected. Establishing the connection to
pin 21 the tolerances increase by +/- 16ppm (internal capacitors), if internal tuning is not used.
Concerning the frequency tolerances of the whole system also crystal tolerances (tuning
tolerances, temperature stability, tolerance of CL) have to be considered.
In addition to the chip tolerances also the crystal and external component tolerances have to be
considered in the tuning and non-tuning case.
Preliminary Specification
56
2003-02-18