AT86RF211SAHW E2V, AT86RF211SAHW Datasheet - Page 12
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AT86RF211SAHW
Manufacturer Part Number
AT86RF211SAHW
Description
IC RF TXRX FSK 400-950MHZ 48TQFP
Manufacturer
E2V
Datasheet
1.AT86RF211SAHW.pdf
(64 pages)
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
-
4.1.3
12
0894C–WIRE–11/08
Synthesizer
A high-speed, high-resolution multi-loop synthesizer is integrated. The synthesizer can operate within
two frequency bands: 400 to 480 MHz and 800 to 950 MHz. All channels within these two bands can be
selected by programming registers F0 to F3. All circuitry is on-chip with the exception of the PLL loop fil-
ter. The phase comparison is made thanks to a charge pump topology. The typical charge pump current
is 225 µA.
Figure 4-4.
The PLL loop filter can be designed to optimize the phase noise around the carrier. A few configurations
for the application and channel spacing can be suggested.
Figure 4-5.
Table 4-2.
Data Rate
Low
Medium
High
Synthesizer Loop Filter Schematic
Choosing the Loop Filter Values
PLL Loop Filter Examples
C1
220 pF
560 pF
100 pF
C2
2.2 nF
5.6 nF
1 nF
Pin 41
FILT1
Fref
R1
C1
FILT1
P F D
C H P
C1
&
R1
14.7 kΩ
3.3 kΩ
10 kΩ
C2
VCOIN
C2
R1
Comments
For improvement of
phase noise
Typical
For high modulation rate
VCO
VCOIN
Pin 42
e2v semiconductors SAS 2008
AT86RF211S