AT86RF211SAHW E2V, AT86RF211SAHW Datasheet - Page 23

• Manufacturer Part Number: AT86RF211SAHW
• Description: IC RF TXRX FSK 400-950MHZ 48TQFP
• Manufacturer: E2V

Specifications of AT86RF211SAHW

• 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-TQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Current - Transmitting: -
• Current - Receiving: -

4.2.12.3
Figure 4-20. Charge and Hold Mode Schematics
4.3
e2v semiconductors SAS 2008
Transmitter Description
Charge and Hold Mode
Demodulator
These procedures are made automatically by the software. Refer to the Application Note “Data Demodu-
lation and Crystal Selection with the AT86RF211S” reference 5418.
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 contact e2v for further 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 “Data Demodulation and Crystal Selection for the AT86RF211S” ref-
erence 5418, for details.
(DSIN)
Output
• Charge: switches A and B are closed. The SKFILT capacitor charges through a
• Pre-charge: to obtain a faster charging time, it is possible to keep the SKFILT capacitor charged to
• Hold: A and B are opened so as to keep SKFILT charged. The leakage current is very low, enabling
100 kΩ resistor. An efficient charge or pre-charge can be done on white noise or on a preamble.
V
slicer.
receipt of a long set of 0 or 1, while maintaining an appropriate data slicer threshold.
CC
/2. To do so, the user shall use the charge mode while selecting the internal reference for the data
This mode is very similar to the external mode and differs only in that the SKFILT voltage value can be held.
DAC
+
-
1
0
Data Slicer
A
100K
Data Slicer
Threshold
B
+
-
SKFILT
DATAMSG
0894C–WIRE–11/08
AT86RF211S
23