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RFRXD0420 Datasheet, PDF (1/32 Pages) Microchip Technology – UHF ASK/FSK/FM Receiver | |||
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rfRXD0420/0920
UHF ASK/FSK/FM Receiver
Features:
⢠Low cost single conversion superheterodyne
receiver architecture
⢠Compatible with rfPIC⢠and rfHCS series of RF
transmitters
⢠Easy interface to PICmicro® microcontroller
(MCU) and KEELOQ® decoders
⢠VCO phase locked to quartz crystal reference:
- Narrow receiver bandwidth
- Maximizes range and interference immunity
⢠Selectable LNA gain control for improved dynamic
range
⢠Selectable IF bandwidth via external ceramic IF
filter
⢠Received Signal Strength Indicator (RSSI) for
signal strength indication (FSK, FM) and ASK
demodulation
⢠FSK/FM quadrature (phase coincidence) detector
demodulator
⢠32-Lead LQFP package
UHF ASK/FSK Receiver:
⢠Single frequency receiver set by crystal frequency
⢠Receive frequency range:
Device
Frequency Range
rfRXD0420
300 MHz to 450 MHz
rfRXD0920
800 MHz to 930 MHz
⢠Maximum data rate:
- ASK: 80 Kbps NRZ
- FSK: 40 Kbps NRZ
⢠IF frequency range: 455 kHz to 21.4 MHz
⢠RSSI range: 70 dB
⢠Frequency deviation range: ±5 kHz to ±120 kHz
⢠Maximum FM modulation frequency: 15 kHz
Pin Diagram:
LQFP
VSS
LNAGAIN
LNAOUT
1IFIN
VSS
1IF+
1IF-
VDD
1
24
2
23
3
4
rfRXD0420
22
21
5 rfRXD0920 20
6
19
7
18
8
17
DEMOUT-
DEMOUT+
VSS
RSSI
OPA+
OPA-
OPA
VDD
Applications:
⢠Wireless remote command and control
⢠Wireless security systems
⢠Remote Keyless Entry (RKE)
⢠Low power telemetry
⢠Low power FM receiver
⢠Home automation
⢠Remote sensing
Bi-CMOS Technology:
⢠Wide operating voltage range
⢠Low current consumption in Active and Standby
modes
- rfRXD0420
- 8.2 mA (typical, LNA High Gain mode)
- <100 nA standby
- rfRXD0920
- 9.2 mA (typical, LNA High Gain mode)
- <100 nA standby
⢠Wide temperature range:
- Industrial: -40°C to +85°C
 2003 Microchip Technology Inc.
Preliminary
DS70090A-page 1
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