MICRF507YML TR【PDF 2/47 页】TXRX FSK LOW PWR W/AMP 32MLF

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Micrel, Inc.

MICRF507

RadioWire FSK Transceiver Selection Guide ................................................................................................................ 4

Ordering Information ......................................................................................................................................................... 4

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

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

Block Diagram .................................................................................................................................................................... 6

Absolute Maximum Ratings .............................................................................................................................................. 7

Operating Ratings .............................................................................................................................................................. 7

Electrical Characteristics .................................................................................................................................................. 7

Functional Description .................................................................................................................................................... 10

Control (3-wire) Interface ...................................................................................................................................... 10

Reading ................................................................................................................................................................. 13

Control Interface Timing ........................................................................................................................................ 14

Power-on Reset .................................................................................................................................................... 14

Clock Generation ............................................................................................................................................................. 15

Crystal Oscillator (XCO) .................................................................................................................................................. 16

BITSYNC_CLK (Receiver Bit Synchronization Clock) .......................................................................................... 17

BITRATE_CLK (Transmitter Bit Rate Clock) ........................................................................................................ 17

MODULATOR_CLK (VCO Modulator Clock) ........................................................................................................ 17

Data Interface and Bit Synchronization ......................................................................................................................... 17

Sync_en = 0 .......................................................................................................................................................... 19

Sync_en = 1 .......................................................................................................................................................... 19

Additional Considerations in the Use of Synchronizer (Sync_en = 1) .................................................................. 19

Frequency Synthesizer .................................................................................................................................................... 20

VCO....................................................................................................................................................................... 22

Charge Pump ........................................................................................................................................................ 22

PLL Filter ............................................................................................................................................................... 22

Lock Detect ........................................................................................................................................................... 23

Receiver ............................................................................................................................................................................ 24

Front End............................................................................................................................................................... 24

Sallen-Key Filters .................................................................................................................................................. 25

Switched Capacitor Filter ...................................................................................................................................... 25

RSSI ...................................................................................................................................................................... 25

FEE ....................................................................................................................................................................... 26

XCOtune Procedure Example ......................................................................................................................................... 27

Transmitter........................................................................................................................................................................ 28

Power Amplifier ..................................................................................................................................................... 28

Frequency Modulation........................................................................................................................................... 29

Divider Modulation ................................................................................................................................................ 30

VCO Modulation and the Modulator ...................................................................................................................... 30

Modulator Filter ..................................................................................................................................................... 32

System Modes and Initialization ..................................................................................................................................... 33

Start-up and Initialization....................................................................................................................................... 33

Modes of Operation ............................................................................................................................................... 33

Mode Transitions ................................................................................................................................................... 33

Message Coding and Formatting ................................................................................................................................... 34

DC Balanced Line Coding ..................................................................................................................................... 34

Message Formatting: Preamble ............................................................................................................................ 34

Typical Application .......................................................................................................................................................... 35

October 2, 2013

Revision 2.2

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