MLX71121
300 to 930MHz
FSK/OOK Receiver
39010 71121 Page 2 of 29 Data Sheet
Rev. 012 Mar/15
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
