CMT2300A
Rev 1.0 | Page2/46
Table of contents
1. Electrical Characteristics............................................................................................................................................ 4
1.1 Recommended Operation Condition ..................................................................................................................... 4
1.2 Absolute Maximum Rating .................................................................................................................................... 4
1.3 Power Consumption.............................................................................................................................................. 5
1.4 Receiver................................................................................................................................................................ 6
1.5 Transmitter ............................................................................................................................................................ 7
1.6 Settle Time............................................................................................................................................................ 8
1.7 Frequency Synthesizer ......................................................................................................................................... 8
1.8 Crystal Oscillator ................................................................................................................................................... 9
1.9 Low Frequency Oscillator...................................................................................................................................... 9
1.10 Low Battery Detection ......................................................................................................................................... 10
1.11 Digital Interface ................................................................................................................................................... 10
1.12 Figures of Critical Parameters............................................................................................................................. 11
1.12.1 Rx Current VS. Supply Voltage ................................................................................................................ 11
1.12.2 Rx Current VS. Voltage Temperature....................................................................................................... 11
1.12.3 Sensitivity VS. Voltage ............................................................................................................................. 12
1.12.4 Sensitivity VS. Temperature..................................................................................................................... 13
1.12.5 Tx Power VS. Supply Voltage .................................................................................................................. 13
2. Pin Descriptions ........................................................................................................................................................ 15
3. Typical Application Schematic ................................................................................................................................. 17
3.1 Direct tie Schematic Diagram.............................................................................................................................. 17
3.2 RF Switch Type Schematic ................................................................................................................................. 19
4. Function Descriptions............................................................................................................................................... 21
4.1 Transmitter .......................................................................................................................................................... 21
4.2 Receiver.............................................................................................................................................................. 22
4.3 Auxiliary Blocks ................................................................................................................................................... 22
4.3.1 Power-On Reset (POR) ........................................................................................................................... 22
4.3.2 Crystal Oscillator...................................................................................................................................... 23
4.3.3 Sleep Timer.............................................................................................................................................. 23
4.3.4 Low Battery Detection.............................................................................................................................. 24
4.3.5 Received Signal Strength Indicator (RSSI) .............................................................................................. 24
4.3.6 Phase Jump Detector（PJD）................................................................................................................ 24
4.3.7 Automatic Frequency Control (AFC) ........................................................................................................ 25
4.3.8 Clock Data Recovery (CDR) .................................................................................................................... 25
4.3.9 Fast Frequency Hopping.......................................................................................................................... 26
5. Chip Operation........................................................................................................................................................... 27
5.1 SPI Interface ....................................................................................................................................................... 27
5.2 FIFO.................................................................................................................................................................... 27
5.2.1 FIFO Read Operation .............................................................................................................................. 28
5.2.2 FIFO Associated Interrupt ........................................................................................................................ 28
5.3 Operation State, Timing and Power Consumption .............................................................................................. 29
