Data Sheet

LJ1269HC
Rev1.0 Page 2 Web: www.ljelect.com
Table of Contentents Page
1. General Description...................................................................................................................................................................................... 8
1.1 Simplified Block Diagram ...................................................................................................................................................................... 8
1.2 Pin Diagram ............................................................................................................................................................................................ 9
1.3 Pin Description ........................................................................................................................................................................................ 9
2. Electrical Characteristics ........................................................................................................................................................................... 10
2.1 Absolute Maximum Ratings................................................................................................................................................................. 10
2.2 Operating Range ................................................................................................................................................................................... 10
2.3 ModuleSpecification ............................................................................................................................................................................. 11
2.3.1. Power Consumption ..................................................................................................................................................................... 11
2.3.2. Frequency Synthesis ..................................................................................................................................................................... 11
2.3.3.Receiver .......................................................................................................................................................................................... 12
2.3.4. Transmitter ................................................................................................................................................................................... 13
2.3.5. Digital Specification ...................................................................................................................................................................... 14
3. ModuleDescription ..................................................................................................................................................................................... 15
3.1 Power Supply Strategy ......................................................................................................................................................................... 15
3.2 Frequency Synthesis ............................................................................................................................................................................. 15
3.2.1. Reference Oscillator ..................................................................................................................................................................... 15
3.2.2. CLKOUT Output ......................................................................................................................................................................... 16
3.2.3. PLL Architecture .......................................................................................................................................................................... 16
3.2.4. Lock Time ................................................................................................................................................................................... 17
3.2.5. Lock Detect Indicator ................................................................................................................................................................... 17
3.3. Transmitter Description ...................................................................................................................................................................... 18
3.3.1. Architecture Description .............................................................................................................................................................. 18
3.3.2. Bit Rate Setting ............................................................................................................................................................................. 18
3.3.3. FSK Modulation ........................................................................................................................................................................... 19
3.3.4. OOK Modulation .......................................................................................................................................................................... 19
3.3.5. Modulation Shaping ..................................................................................................................................................................... 20
3.3.6. Power Amplifiers .......................................................................................................................................................................... 20
3.3.7. High Power Settings ..................................................................................................................................................................... 21
3.3.8. Output Power Summary .............................................................................................................................................................. 21
3.3.9 Over Current Protection ............................................................................................................................................................... 21
3.4 Receiver Description ............................................................................................................................................................................. 22
3.4.1. LNA - Single to Differential Buffer ............................................................................................................................................. 22
3.4.2 Automatic Gain Control ................................................................................................................................................................ 23
3.4.3. Continuous-Time DAGC ............................................................................................................................................................. 24
3.4.4. Quadrature Mixer - ADCs – Decimators .................................................................................................................................... 25
3.4.5. Channel Filter ............................................................................................................................................................................... 25
3.4.6. DC Cancellation ............................................................................................................................................................................ 26
3.4.7. Complex Filter - OOK .................................................................................................................................................................. 26
3.4.8. RSSI ............................................................................................................................................................................................... 27
3.4.9. Cordic ............................................................................................................................................................................................ 27
3.4.10. FSK Demodulator ....................................................................................................................................................................... 28
Sub GHz FSK/OOK Transceiver Module DATASHEET