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CC2480 Datasheet(PDF) 11 Page - Texas Instruments

Part # CC2480
Description  Z-Accel 2.4 GHz ZigBee Processor
PDF  48 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

CC2480 Datasheet(HTML) 11 Page - Texas Instruments

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CC2480
Table 8: 32.768 kHz Crystal Oscillator Parameters
Parameter
Min
Typ
Max
Unit
Condition/Note
Crystal frequency
32.768
kHz
Crystal frequency
accuracy
requirement
–40
40
ppm
Including aging and temperature dependency, as specified by [1]
ESR
40
130
k
Ω
Simulated over operating conditions
C0
0.9
2.0
pF
Simulated over operating conditions
CL
12
16
pF
Simulated over operating conditions
Start-up time
400
ms
Value is simulated.
5.6
32 kHz RC Oscillator
Measured on Texas Instruments
CC2480 EM reference design with TA=25°C and VDD=3.0V
unless stated otherwise.
Table 9: 32 kHz RC Oscillator parameters
Parameter
Min
Typ
Max
Unit
Condition/Note
Calibrated frequency
32.753
kHz
The calibrated 32 kHz RC Oscillator frequency
is the 32 MHz XTAL frequency divided by 977
Frequency accuracy after
calibration
±0.2
%
Value is estimated.
Temperature coefficient
+0.4
% /
°C
Frequency drift when temperature changes
after calibration. Value is estimated.
Supply voltage coefficient
+3
% / V
Frequency drift when supply voltage changes
after calibration. Value is estimated.
Initial calibration time
1.7
ms
When the 32 kHz RC Oscillator is enabled,
calibration is continuously done in the
background as long as the 32 MHz crystal
oscillator is running.
5.7
16 MHz RC Oscillator
Measured on Texas Instruments
CC2480 EM reference design with TA=25°C and VDD=3.0V
unless stated otherwise.
Table 10: 16 MHz RC Oscillator parameters
Parameter
Min
Typ
Max
Unit
Condition/Note
Frequency
16
MHz
The calibrated 16 MHz RC Oscillator
frequency is the 32 MHz XTAL frequency
divided by 2
Uncalibrated frequency
accuracy
±18
%
Calibrated frequency
accuracy
±0.6
±1
%
Start-up time
10
µs
Temperature coefficient
-325
ppm /
°C
Frequency drift when temperature changes
after calibration
Supply voltage coefficient
28
ppm / mV
Frequency drift when supply voltage changes
after calibration
Initial calibration time
50
µs
When the 16 MHz RC Oscillator is enabled it
will be calibrated continuously when the
32MHz crystal oscillator is running.
CC2480 Data Sheet SWRS074A
Page 11 of 43



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