AT86RF211SDK E2V, AT86RF211SDK Datasheet - Page 12

• Manufacturer Part Number: AT86RF211SDK
• Description: KIT DEV FOR AT86RF211/915MHZ
• Manufacturer: E2V
• Series: Smart RFr
• Type: Transceiverr

Specifications of AT86RF211SDK

• Frequency: 915MHz
• For Use With/related Products: AT86RF211 @ 915MHz
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: AT86RF211-DK; AT86RF211-DK915107; AT86RF211DK; AT86RF211DK915107; AT86RF211DK915107

Table 2-1.
2.1.2
12
Reference Clock Frequency
10.245 MHz
20.500 MHz (RF211S mode
only)
20.945 MHz
AT86RF211S
Microcontroller Clocking Capability
XTO Frequencies
IF1 Frequency
10.7 MHz
10.7 MHz
21.4 MHz
It is preferable to add a resistor (3.3 kΩ) between XTAL2 and GND. This decreases the
settling time of the XTO to typically 8 ms with an extra power consumption of only a few
hundred µA. For applications in which XTO is always active, we suggest that you
remove this resistor to save battery life.
If an external frequency reference is used together with the AT86RF211S, it must be
applied to pin 23 XTAL1. A coupling capacitor is recommended if the source is not DC-
free qualified. Pin 24 XTAL2 should remain Not Connected.
The microcontroller can be provided with a calibrated clock, derived from the clock of
the AT86RF211S, with either 10.245, 20.5 or 20.945 MHz. Therefore, as detailed in
“Control Logic” on page 34, this feature is only activated once and CTRL1[0] is set to "1"
to access the additional features.
Through internal buffers and multiplexers, the AT86RF211S can clock its companion
controller. The frequency fed to the microcontroller can be adjusted by programming the
DTR[20:14] bits, thus activating a set of dividers. This clock’s reference signal is avail-
able on the DIGOUT pin.
Possible IF1 Bandwidth
Up to 380 kHz
Up to 380 kHz
Up to 50 kHz
Comments
Cheap ceramic filters available
at 10.7 MHz
Crystal filter at 21.4 MHz
required. The cost is higher but
better image rejection and
selectivity can be achieved
5348B–WIRE–03/06