MRF39RA Datasheet, PDF (1/72 Pages) Microchip Technology – Low-Power, Integrated UHF Receiver

MRF39RA
Low-Power, Integrated UHF Receiver
Features
• High Sensitivity:
- down to -120 dBm at 1.2 kbps
• High Selectivity:
- 16-Tap FIR channel filter
• Bullet-Proof Front End:
- IIP3 = -18 dBm, IIP2 = +35 dBm, 80 dB
blocking immunity, no image frequency
response
• Low Current:
- Rx = 16 mA, 100 nA register retention
• Constant RF Performance over Voltage Range of
Chip
• FSK Bit Rates up to 300 kbps
• Fully Integrated Synthesizer with a Resolution of
61 Hz
• FSK, GFSK, MSK, GMSK and OOK
Demodulation
• Built-in Bit Synchronizer Performing Clock
Recovery
• Incoming Sync Word Recognition
• 115 dB+ Dynamic Range Received Signal
Strength Indicator (RSSI)
• Automatic RF Sense with Ultra-Fast Automatic
Frequency Control (AFC)
• Packet Engine with CRC, AES-128 Encryption
and 66-Byte First In First Out (FIFO)
• Built-in Temperature Sensor and Low-Battery
Indicator
General Description
The MRF39RA device is a highly integrated RF
receiver capable of operation over a wide frequency
range, including the 433, 868 and 915 MHz
license-free Industry Scientific and Medical (ISM)
frequency bands. Its highly integrated architecture
enables for a minimum of external components while
maintaining maximum design flexibility. All major RF
communication parameters are programmable and
most of these can be dynamically set. The MRF39RA
offers the unique advantage of programmable
narrow-band and wide-band communication modes
without the need of modifying external components.
The MRF39RA is optimized for low-power
consumption while offering high sensitivity and
channelized operation. TrueRF™ technology enables
a low-cost external component count (elimination of the
SAW filter) while still satisfying the European
Telecommunications Standards Institute (ETSI) and
Federal Communications Commission (FCC)
regulations.
FIGURE 1:
MRF39RA RECEIVER:
LOW-POWER INTEGRATED
UHF RECEIVER
RFIN
VBAT1&2
VR_ANA
VR_DIG
Power Distribution System
LNA

Single to
Mixers
Modulators
Differential
RC
Oscillator
RESET
SPI
Division by
2, 4 or 6
RSSI
AFC
GND
Tank
Inductor
NC
Loop
Frac-N PLL
Filter
Synthesizer
NC
NC
XO
32 MHz
DIO0
DIO1
DIO2
DIO3
DIO4
DIO5
XTAL
GND
Typical Applications
• Automated Meter Reading
• Wireless Sensor Networks
• Home and Building Automation
• Wireless Alarm and Security Systems
• Industrial Monitoring and Control
• Wireless M-Bus
Pin Diagram
FIGURE 2:
24-PIN QFN
24 23 22 21 20 19
VBAT1 1
18 NSS
VR_ANA 2
17 MOSI
VR_DIG 3
16 MISO
XTA 4
15 SCK
XTB 5
14 GND
RESET 6
7
13 VBAT2
8 9 10 11 12
Markets
• Europe: EN 300-220-1
• North America: FCC Part 15.247, 15.249, 15.231
• Narrow Korean and Japanese Bands
 2015 Microchip Technology Inc.
DS40001778B-page 1