MLX71122
300 to 930MHz FSK/FM/ASK Receiver
Datasheet
Document Content
1. Theory of Operation.........................................................................................................................6
1.1. General................................................................................................................................................... 6
1.2. Technical Data Overview........................................................................................................................ 7
1.3. Block Diagram ........................................................................................................................................ 7
1.4. Enable/Disable in ABC Mode.................................................................................................................. 8
1.5. Demodulation Selection in ABC Mode ................................................................................................... 8
1.6. Programming Modes.............................................................................................................................. 8
1.7. Preconfigured Frequencies in ABC Mode .............................................................................................. 8
2. Pin Definitions and Descriptions ....................................................................................................10
2.1. Pin Schematics ..................................................................................................................................... 10
2.2. RF Pin Impedance Models.................................................................................................................... 15
3. Functional Description ...................................................................................................................16
3.1. Frequency Planning.............................................................................................................................. 16
3.1.1. Calculation of Counter Settings .................................................................................................... 18
3.1.2. Calculation of LO1 and IF1 frequency for Low Frequency Bands ................................................. 19
3.1.3. Calculation of LO1 and IF1 frequency for High Frequency Bands ................................................ 19
3.1.4. Counter Setting Examples for SPI Mode....................................................................................... 20
3.1.5. Counter Settings in ABC Mode – 8+1 Preconfigured Channels .................................................... 20
3.2. PLL Frequency Synthesizer................................................................................................................... 21
3.2.1. Pulse Swallow Counter ................................................................................................................. 22
3.2.2. PLL Counter Ranges...................................................................................................................... 23
3.2.3. Reference Oscillator (RO) ............................................................................................................. 23
3.2.4. Phase-Frequency Detector (PFD) ................................................................................................. 24
3.2.5. Charge Pump (CP)......................................................................................................................... 24
3.2.6. Loop Filter (LF).............................................................................................................................. 24
3.2.7. Lock Detector (LD)........................................................................................................................ 25
3.2.8. Voltage Controlled Oscillator (VCO) ............................................................................................. 26
3.2.9. Loop Filter Calculation.................................................................................................................. 26
3.3. Receiver Front End............................................................................................................................... 28
3.3.1. Low Noise Amplifier (LNA) and Mixer 1 (MIX1)............................................................................ 28
3.3.2. Mixer 2 (MIX2).............................................................................................................................. 29
3.3.3. IF Filter (IFF).................................................................................................................................. 29
3.3.4. FSK Demodulator.......................................................................................................................... 30
3.3.5. Autotuning Circuit ........................................................................................................................ 30
3.3.6. IF Amplifier (IFA)........................................................................................................................... 31
3.3.7. Automatic Gain Control (AGC)...................................................................................................... 32
3.4. Data Path.............................................................................................................................................. 33
REVISION 014 – AUGUST, 2016
Page 3 of 59
390 10 71122 01
5秒后页面跳转
NE5532P芯片资料：引脚说明、电气参数及替换型号推荐
解读MMBT5401数据手册：电气参数及替换型号推荐
深入解读BAV70数据手册：特性、电气参数及替换型号推荐
74HC595D芯片引脚图及功能、参数介绍、替代型号推荐
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
技术参数
数据手册
如果您发现信息不准确，
