SX1232
WIRELESS & SENSING
DATASHEET
Table of Contents
Section
Page
1.
General Description ................................................................................................................................................ 9
1.1.
1.2.
1.3.
Simplified Block Diagram ................................................................................................................................ 9
Pin and Marking Diagram.............................................................................................................................. 10
Pin Description.............................................................................................................................................. 11
2.
Electrical Characteristics....................................................................................................................................... 12
2.1.
ESD Notice.................................................................................................................................................... 12
Absolute Maximum Ratings .......................................................................................................................... 12
Operating Range........................................................................................................................................... 12
Chip Specification ......................................................................................................................................... 13
2.2.
2.3.
2.4.
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
Chip Description.................................................................................................................................................... 17
3.
3.1.
Power Supply Strategy.................................................................................................................................. 18
Low Battery Detector..................................................................................................................................... 18
Frequency Synthesis..................................................................................................................................... 19
3.2.
3.3.
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. RSSI......................................................................................................................................................... 28
3.5.4. Channel Filter........................................................................................................................................... 29
3.5.5. FSK Demodulator..................................................................................................................................... 30
3.5.6. OOK Demodulator.................................................................................................................................... 30
3.5.7. Bit Synchronizer 33
Rev 3 - August 2012
Page 2
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