AT86RF211SAH-R Atmel, AT86RF211SAH-R Datasheet - Page 24

• Manufacturer Part Number: AT86RF211SAH-R
• Description: IC RF TXRX FSK 400-950MHZ 48TQFP
• Manufacturer: Atmel

Specifications of AT86RF211SAH-R

• Frequency: 400MHz ~ 950MHz
• Data Rate - Maximum: 100kbps
• Modulation Or Protocol: FSK
• Applications: ISM
• Power - Output: 7dBm ~ 12dBm
• Sensitivity: -107dBm
• Voltage - Supply: 2.4 V ~ 3.6 V
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-TQFP Exposed Pad, 48-eTQFP, 48-HTQFP, 48-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Memory Size: -
• Current - Transmitting: -
• Current - Receiving: -

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