RFRXD0920T-I/LQ Microchip Technology, RFRXD0920T-I/LQ Datasheet - Page 19
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RFRXD0920T-I/LQ
Manufacturer Part Number
RFRXD0920T-I/LQ
Description
IC RCVR 868/915MHZ ASK/FSK32LQFP
Manufacturer
Microchip Technology
Datasheet
1.RFRXD0420-ILQ.pdf
(32 pages)
Specifications of RFRXD0920T-I/LQ
Package / Case
32-LQFP
Frequency
800MHz ~ 930MHz
Sensitivity
-106dBm
Data Rate - Maximum
80 kbps
Modulation Or Protocol
ASK, FM, FSK
Applications
Home Automation, Remote Sensing, RKE
Current - Receiving
9.2mA
Data Interface
PCB, Surface Mount
Antenna Connector
PCB, Surface Mount
Voltage - Supply
2.5 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Operating Supply Voltage
3.3 V, 5 V
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Memory Size
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
rfRXD0420/0920
3.3.3
POST DETECTOR FILTERING
Care should be taken in selecting the values of capac-
itors C1 and C2 (Figure 3-13) so that the output of the
detector is not distorted and receiver sensitivity
improved. These values are chosen depending on the
data signal rate.
Generally, if the data signal rate is fast then the filter
time constant can be set short. Conversely, if the signal
rate is slow, the filter time constant can be set long. The
designer should observe the output of the detector with
an oscilloscope and perform operational and/or bit
error rate testing to confirm receiver performance.
3.3.4
COMPARATOR
The output of the DEMOD amplifier (DEM
OUT
+ and
OUT
DEM
-, Pins 23 and 24) depends on the peak
deviation of the FSK or FM signal and the Q of the
external tuned circuit. DEMout+ and DEMout- are high
impedance outputs with only a 20 µA current capability.
The capacitance on these pins limit the maximum data
signal rate. The nominal output voltage of these pins is
1.23V.
Preliminary
2003 Microchip Technology Inc.
DS70090A-page 19