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Micrel, Inc.
MICRF620
December 2005
2
M9999-120205
Contents
General Description ................................................................................................................................................................ 1
Features .................................................................................................................................................................................. 1
Applications ............................................................................................................................................................................. 1
Contents .................................................................................................................................................................................. 2
RadioWire
RF Module Selection Guide................................................................................................................................. 3
Ordering Information ............................................................................................................................................................... 3
Block Diagram......................................................................................................................................................................... 3
Pin Configuration..................................................................................................................................................................... 4
Pin Description ........................................................................................................................................................................ 4
Absolute Maximum Ratings
(1) ................................................................................................................................................. 5
Operating Ratings
(2) ................................................................................................................................................................ 5
Electrical Characteristics......................................................................................................................................................... 5
Programming........................................................................................................................................................................... 7
General ............................................................................................................................................................................... 7
Writing to the Control Registers in MICRF620 ................................................................................................................... 8
Writing to a Single Register ................................................................................................................................................ 8
Writing to All Registers ....................................................................................................................................................... 8
Writing to n Registers Having Incremental Addresses ....................................................................................................... 9
Reading from the Control Registers in MICRF620 ............................................................................................................. 9
Reading n Registers from MICRF620................................................................................................................................. 9
Programming Interface Timing.............................................................................................................................................. 10
Programming Summary.................................................................................................................................................... 11
Frequency Synthesizer ......................................................................................................................................................... 11
Crystal Oscillator (XCO) ................................................................................................................................................... 11
VCO .................................................................................................................................................................................. 12
Lock Detect ....................................................................................................................................................................... 12
Modes of Operation............................................................................................................................................................... 12
Transceiver Sync/Non-Synchronous Mode ...................................................................................................................... 13
Data Interface ................................................................................................................................................................... 13
Receiver ................................................................................................................................................................................ 13
Front End .......................................................................................................................................................................... 14
Sallen-Key Filters.............................................................................................................................................................. 14
Switched Capacitor Filter.................................................................................................................................................. 14
RSSI.................................................................................................................................................................................. 14
FEE ................................................................................................................................................................................... 15
Bit Synchronizer................................................................................................................................................................ 15
Transmitter ............................................................................................................................................................................ 16
Power Amplifier................................................................................................................................................................. 16
Frequency Modulation ...................................................................................................................................................... 16
Using the XCO-tune Bits ....................................................................................................................................................... 16
Application Circuit Illustration ................................................................................................................................................ 17
Assembling the MICRF620 ................................................................................................................................................... 17
Recommended Reflow Temperature Profile .................................................................................................................... 17
Shock/Vibration during Reflow.......................................................................................................................................... 17
Handassembling the MICRF620....................................................................................................................................... 17
Layout.................................................................................................................................................................................... 18
Recommended Land Pattern............................................................................................................................................ 18
Layout Considerations ...................................................................................................................................................... 18
Package Dimensions ............................................................................................................................................................ 19
Tape Dimensions .................................................................................................................................................................. 19