RFM66W datasheet(2/87 Pages) ETC2

Part #	RFM66W

Description	868 & 915MHz Ultra Low Power High Link Budget Integrated UHF Transceiver

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RFM66W

Table of Contents

Section

Page

1.

General Description ................................................................................................................................................... 9

1.1.

Simplified Block Diagram ................................................................................................................................ 9

1.2.

Pin and Marking Diagram ................................................................................................................................. 10

1.3.

Pin Description ................................................................................................................................................. 11

2.

Electrical Characteristics.......................................................................................................................................... 12

2.1.

ESD Notice....................................................................................................................................................... 12

2.2.

Absolute Maximum Ratings .......................................................................................................................... 12

2.3.

Operating Range.............................................................................................................................................. 12

2.4.

Chip Specification ............................................................................................................................................ 13

2.4.1. Power Consumption .................................................................................................................................. 13

2.4.2. Frequency Synthesis ................................................................................................................................. 13

2.4.3. Receiver ...................................................................................................................................................... 14

2.4.4. Transmitter ................................................................................................................................................. 15

2.4.5. Digital Specification .................................................................................................................................... 16

3.

Chip Description......................................................................................................................................................... 17

3.1.

Power Supply Strategy..................................................................................................................................... 18

3.2.

Low Battery Detector.....................................................................................................................................

18

3.3.

Frequency Synthesis ........................................................................................................................................ 19

3.3.1. Reference Oscillator .................................................................................................................................. 19

3.3.2. CLKOUT Output ......................................................................................................................................... 19

3.3.3. PLL Architecture ......................................................................................................................................... 19

3.3.4. RC Oscillator .............................................................................................................................................. 21

3.4.

Transmitter Description ................................................................................................................................. 22

3.4.1. Architecture Description ............................................................................................................................. 22

3.4.2. Bit Rate Setting .......................................................................................................................................... 22

3.4.3. FSK Modulation .......................................................................................................................................... 23

3.4.4. OOK Modulation ......................................................................................................................................... 24

3.4.5. Modulation Shaping..................................................................................................................................... 24

3.4.6. RF Power Amplifiers.................................................................................................................................... 24

3.4.7. High Power +20dBm Operation .................................................................................................................25

3.4.8. Over Current Protection ............................................................................................................................26

3.5.

Receiver Description ........................................................................................................................................ 27

3.5.1. Overview .................................................................................................................................................. 27

3.5.2. Automatic Gain Control - AGC ................................................................................................................. 27

3.5.3. Enabling the Demodulation ...................................................................................................................... 28

3.5.4. RSSI .........................................................................................................................................................30

3.5.5. Channel Filter ........................................................................................................................................... 30

3.5.6. FSK Demodulator ..................................................................................................................................... 31

3.5.7. OOK Demodulator .................................................................................................................................... 31

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