Micrel

MICRF505BML/YML

October 2006

2

M9999-103106

+1 408-944-0800

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

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

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

RadioWire® RF Selection Guide ............................................................................................................................... 4

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

Block Diagram............................................................................................................................................................ 4

Pin Configuration........................................................................................................................................................ 5

Pin Description ........................................................................................................................................................... 5

Absolute Maximum Ratings

Operating Ratings

Electrical Characteristics

Programming.............................................................................................................................................................. 9

Writing to the control registers in MICRF505 ........................................................................................................... 10

Writing to a Single Register ..................................................................................................................................... 10

Writing to All Registers............................................................................................................................................. 11

Writing to n Registers having Incremental Addresses ............................................................................................. 11

Writing to n Registers having Non-Incremental Addresses ..................................................................................... 12

Reading from the control registers in MICRF505 .................................................................................................... 12

Programming interface timing .................................................................................................................................. 12

Power on Reset........................................................................................................................................................ 13

Programming summary............................................................................................................................................ 14

Frequency Synthesizer ............................................................................................................................................ 15

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

VCO ...................................................................................................................................................................... 17

Charge Pump ....................................................................................................................................................... 18

PLL Filter .............................................................................................................................................................. 18

Lock Detect........................................................................................................................................................... 18

Modes of Operation .............................................................................................................................................. 18

Transceiver Sync/Non-Synchronous Mode ............................................................................................................. 19

Data Interface........................................................................................................................................................... 19

Receiver ................................................................................................................................................................... 20

Front End.............................................................................................................................................................. 20

Sallen-Key Filters ................................................................................................................................................. 20

Switched Capacitor Filter ..................................................................................................................................... 21

RSSI ..................................................................................................................................................................... 21

FEE....................................................................................................................................................................... 22

Bit Synchronizer ................................................................................................................................................... 23

Transmitter ............................................................................................................................................................... 24

Power Amplifier .................................................................................................................................................... 24

Modulator.............................................................................................................................................................. 26

Using the XCO-tune Bits .......................................................................................................................................... 28

Typical Application ................................................................................................................................................... 30