AT86RF211SDK E2V, AT86RF211SDK Datasheet - Page 24

• 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

2.2.12.3
Figure 2-19. Charge and Hold Mode Schematics
24
AT86RF211S
Charge and Hold Mode
Demodulator
(DSIN)
Output
DAC
After a single charge phase (for example, during a preamble), the comparison threshold
of the data slicer is stored in the external SKFILT capacitor. Once the threshold is
stored, the bits that follow can be directly demodulated. Please refer to the Application
Note for more information.
Note:
As a subdivision of the external mode (previously described) the Charge and Hold
allows the following settings:
Please refer to the Application Note "
AT86RF211S”
• Charge: switches A and B are closed. The SKFILT capacitor charges through a
• Hold: A and B are opened so as to keep SKFILT charged. The leakage current is
• Pre-charge: to obtain a faster charging time, it is possible to keep the SKFILT
+
-
100 kΩ resistor. An efficient charge or pre-charge can be done on white noise or on a
preamble.
capacitor charged to V
selecting the internal reference for the data slicer.
very low, enabling receipt of a long set of 0 or 1, while maintaining an appropriate
data slicer threshold.
This mode is very similar to the external mode and differs only in that the SKFILT voltage
value can be held.
reference 5418, for details.
1
0
Data Slicer
A
CC
/2. To do so, the user shall use the charge mode while
100K
“Data Demodulation and Crystal Selection for the
Data Slicer
Threshold
B
+
-
SKFILT
DATAMSG
5348B–WIRE–03/06