RFRXD0420T-I/LQ Microchip Technology, RFRXD0420T-I/LQ Datasheet - Page 19

• Manufacturer Part Number: RFRXD0420T-I/LQ
• Description: IC RCVR 315/433MHZ ASK/FSK32LQFP
• Manufacturer: Microchip Technology

Specifications of RFRXD0420T-I/LQ

• Frequency: 300MHz ~ 450MHz
• 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
• Package / Case: 32-LQFP
• For Use With: DV164102 - KIT DEV RFPICKIT KIT 1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -

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