SAM3N0C Atmel Corporation, SAM3N0C Datasheet - Page 712

• Manufacturer Part Number: SAM3N0C
• Manufacturer: Atmel Corporation

35.4.6
Table 35-20. 3 to 20 MHz Crystal Oscillator Characteristics
Notes:
Where
712
Symbol
F
F
T
I
P
R
C
C
DD_ON
req
req_bypass
ON
ON
f
LEXT
L
C
1. R
2. Rs = 100-200 Ohms; Cs = 2.0 - 2.5pF; Cm = 2 – 1.5 fF(typ, worst case) using 1 KΩ serial resistor on XOUT.
3. Rs = 50-100 Ohms; Cs = 2.0 - 2.5pF; Cm = 4 - 3 fF(typ, worst case).
4. Rs = 25-50 Ohms; Cs = 2.5 - 3.0pF; Cm = 7 - 5 fF (typ, worst case).
5. Rs = 20-50 Ohms; Cs = 3.2 - 4.0pF; Cm = 10 - 8 fF(typ, worst case).
PCB
SAM3N
3 to 20 MHz Crystal Oscillator Characteristics
is the capacitance of the printed circuit board (PCB) track layout from the crystal to the SAM3 pin.
S
is the series resistor
Parameter
Operating Frequency
Operating Frequency In Bypass Mode
Supply Ripple Voltage (on VDDPLL)
Duty Cycle
Startup Time
Current consumption
Drive level
Internal resistor
Maximum external capacitor
on XIN and XOUT
Internal Equivalent Load Capacitance
C
XIN
LEXT
C
LEXT
= 2x(
C
SAM3
Crystal
Conditions
Normal mode with crystal
External Clock on XIN
Rms value, 10 KHz to 10 MHz
3 MHz, C
8 MHz, C
12 to 16 MHz, C
20 MHz, C
3 MHz
8 MHz
12 to 16 MHz
20 MHz
3 MHz
8 MHz
12 MHz, 16 MHz, 20 MHz
between XIN and XOUT
Integrated Load Capacitance
(XIN and XOUT in series)
C
CRYSTAL
C
L
(2)
(3)
(5)
SHUNT
SHUNT
SHUNT
–
C
(4)
R=1K if Crystal Frequency
C
XOUT
L
= 3pF
= 7pF
LEXT
is lower than 8MHz
SHUNT
= 7pF
–
C
PCB
= 7pF
)
12.5
Min
7.5
40
3
Typ
150
200
250
350
9.5
16
50
1
11011A–ATARM–04-Oct-10
Max
14.5
17.5
11.5
230
300
350
450
1.4
20
50
30
60
15
30
50
4
1
MHz
MHz
Unit
mV
µW
MΩ
ms
µA
pF
pF
%