AT86RF211SAHW Atmel, AT86RF211SAHW Datasheet - Page 10

• Manufacturer Part Number: AT86RF211SAHW
• Manufacturer: Atmel

Specifications of AT86RF211SAHW

• Lead Free Status / Rohs Status: Compliant

4. Detailed Description
4.1
4.1.1
Figure 4-2.
Notes:
10
C L = 16 pF
Frequency Synthesis
1. Various load capacitance (C
2. Thanks to the synthesizer’s fine steps (200 Hz), the trimmer capacitor can be replaced by adjusting the software.
0894C–WIRE–11/08
Crystal Reference Oscillator
re-calculated.
15 pF
(1)
Typical Networks
XTAL1
The reference clock is based on a classic Colpitts architecture with three external capacitors.
The bias circuitry of the oscillator is optimized to produce a low drive level for the XTAL. This reduces
XTAL aging.
Note:
Figure 4-1.
Any parallel-mode 10.245 MHz crystal can be used. Its load capacitance must be between 10 pF and
20 pF.
C1 = 82 pF
The PLL is only activated when the oscillator is stabilized.
6.5/30 pF
Crystal Oscillator Inputs
(2)
L
XTAL2
) crystals can be used. If C
C2 = 56 pF
R = 3.3 kΩ
XTAL2
XTAL1
L
C L = 20 pF
differs from 16 or 20 pF, the surrounding network (C1, C2) must be
33 pF
(1)
XTAL1
C1 = 68 pF
6.5/30 pF
(2)
XTAL2
C2 = 68 pF
e2v semiconductors SAS 2008
AT86RF211S
R = 3.3 kΩ