tda5251f1 Infineon Technologies Corporation, tda5251f1 Datasheet - Page 56

• Manufacturer Part Number: tda5251f1
• Description: Ask/fsk 315mhz Wireless Transceiver
• Manufacturer: Infineon Technologies Corporation

Confidential
Default values
In case of using the evaluation board, the crystal with its typical parameters (fp=13.125MHz,
C
each are used the following default states are set in the device
Table 3-6
3.2.7
Quartz: fp=13.125MHz; C1=6.5fF; C0=1,8pF; CL=20pF (typical values)
Cv1=27pF, Cv2=1.0pF, Cv3=15pF
Table 3-7
Table 3-8
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 C L ) 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
1
=6.5fF, C
+FSK-TX / ASK-RX
ASK-TX / FSK-RX
Inductivity of the crystal oscillator
Operating state
Internal capacitors (+/- 10%)
Supply Voltage (2.1...5.5V)
Supply Voltage(2.1...5.5V)
Temperature (-40...+85C)
Temperature (-40...+85C)
-FSK-TX
Frequency set accuracy
0
Chip and System Tolerances
=1.8pF, C
Default oscillator settings
Internal Tuning
Default Setup (without internal tuning & without Pin21 usage)
Total
Total
Part
Part
L
=20pF) and external capacitors with Cv1=27pF, Cv2=1.0pF, Cv3=15pF
Frequency
315.0 MHz
+30 kHz
-30 kHz
56
Frequency tolerance
Frequency tolerance
@ 315MHz
@ 315MHz
+/- 1.3kHz
+/- 2.5kHz
+/- 0.6kHz
+/- 4.4kHz
+/- 2.5kHz
+/- 2.5kHz
+/- 0.6kHz
+/- 7.8kHz
+/-2.2kHz
.
Rel. tolerance
Rel. tolerance
+/- 14ppm
+/- 25ppm
+/- 4ppm
+/- 8ppm
+/- 2ppm
+/- 7ppm
+/- 8ppm
+/- 2ppm
+/-8ppm
TDA5251 F1
Version 1.0
Application
2003-02-18