Micrel, Inc.

MICRF620

December 2005

2

M9999-120205

Contents

General Description ................................................................................................................................................................ 1

Features .................................................................................................................................................................................. 1

Applications ............................................................................................................................................................................. 1

Contents .................................................................................................................................................................................. 2

RadioWire

Ordering Information ............................................................................................................................................................... 3

Block Diagram......................................................................................................................................................................... 3

Pin Configuration..................................................................................................................................................................... 4

Pin Description ........................................................................................................................................................................ 4

Absolute Maximum Ratings

Operating Ratings

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