CC2510FX Datasheet, PDF (16/244 Pages) List of Unclassifed Manufacturers – True System-on-Chip with Low Power RF Transceiver and 8051 MCU

C2510Fx / CC2511Fx
7.4 Crystal Oscillators
7.4.1 CC2510Fx Crystal Oscillator
T_A = 25 °C, VDD = 3.0 V if nothing else is stated.
Parameter
Crystal frequency
Crystal frequency
accuracy
requirement
C₀
Load capacitance
ESR
Start-up time
Min Typ Max Unit Condition/Note
24 26 27 MHz Referred to as f_XOSC. For operation in the range 24 – 26 MHz, please
refer to Table 4 for Operating Conditions.
±40
ppm This is the total tolerance including a) initial tolerance, b) crystal
loading, c) aging, and d) temperature dependence.
The acceptable crystal tolerance depends on RF frequency and
channel spacing / bandwidth.
1
5
7
pF Simulated over operating conditions
10 13 20 pF Simulated over operating conditions
100 Ω Simulated over operating conditions
250
µs f_XOSC = 26 MHz
Note: A Ripple counter of 12 bit is included to ensure duty-cycle
requirements. Start-up time includes ripple counter delay until
SLEEP.XOSC_STB is asserted
Table 11: CC2510Fx Crystal Oscillator Parameters
7.4.2 CC2511Fx Crystal Oscillator
T_A = 25 °C, VDD = 3.0 V if nothing else is stated.
Parameter
Crystal frequency
Crystal frequency
accuracy
requirement
C₀
Fundamental
3^rd overtone
Load capacitance
ESR
Start-up time
Fundamental
3^rd overtone
Min Typ Max Unit Condition/Note
48
MHz Referred to as f_XOSC
±40
ppm This is the total tolerance including a) initial tolerance, b) crystal
loading, c) aging, and d) temperature dependence.
The acceptable crystal tolerance depends on RF frequency and
channel spacing / bandwidth.
0.85 1 1.15 pF Simulated over operating conditions. Variation given by reference
crystal NX2520SA from NDK
2
3
7
pF
15 16 17 pF Simulated over operating conditions
60
Ω Simulated over operating conditions
Note: A Ripple counter of 14 bit is included to ensure duty-cycle
requirements. Start-up time includes ripple counter delay until
SLEEP.XOSC_STB is asserted
650
µs
3
ms Simulated value
Table 12: CC2511Fx Crystal Oscillator Parameters
SWRS055D
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