MLX71121_15 Datasheet, PDF (2/29 Pages) Melexis Microelectronic Systems – FSK/OOK Receiver

MLX71121
300 to 930MHz
FSK/OOK Receiver
Table of Contents
1 Theory of Operation ...................................................................................................4
1.1 General ................................................................................................................................ 4
1.2 Technical Data Overview ..................................................................................................... 4
1.3 Block Diagram...................................................................................................................... 5
1.4 Operating Modes ................................................................................................................. 6
1.5 LNA Selection ...................................................................................................................... 6
1.6 Mixer Section ....................................................................................................................... 7
1.7 IF Filter................................................................................................................................. 7
1.8 IF Amplifier........................................................................................................................... 7
1.9 PLL Synthesizer................................................................................................................... 7
1.10 Reference Oscillator ......................................................................................................... 8
1.11 Clock Output ..................................................................................................................... 8
1.12 FSK Demodulator ............................................................................................................. 8
1.13 Baseband Data Path ........................................................................................................ 9
1.14 Data Filter ....................................................................................................................... 10
1.15 Data Slicer ...................................................................................................................... 10
1.15.1 Averaging Detection Mode ..................................................................................................... 11
1.15.2 Peak Detection Mode ............................................................................................................. 11
1.16 Data Output and Noise Cancellation Filter ..................................................................... 12
2 Functional Description ............................................................................................14
2.1 Frequency Planning ........................................................................................................... 14
2.2 Calculation of Frequency Settings ..................................................................................... 15
2.3 Standard Frequency Plans ................................................................................................ 16
2.4 433/868MHz Frequency Diversity...................................................................................... 16
3 Pin Definitions and Descriptions ............................................................................17
4 Technical Data..........................................................................................................21
4.1 Absolute Maximum Ratings ............................................................................................... 21
4.2 Normal Operating Conditions............................................................................................. 21
4.3 DC Characteristics ............................................................................................................. 22
4.4 AC System Characteristics ................................................................................................ 23
4.5 External Components ........................................................................................................ 24
5 Test Circuit ...............................................................................................................25
39010 71121
Rev. 012
Page 2 of 29
Data Sheet
Mar/15