MLX71121

300 to 930MHz

FSK/FM/ASK Receiver

39010 71121

Page 2 of 28

Data Sheet

Rev. 007

Feb/08

Document Content

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 ............................................................................................13

2.1

Frequency Planning........................................................................................................ 13

2.2

Calculation of Frequency Settings .................................................................................. 14

2.3

Standard Frequency Plans ............................................................................................. 15

2.4

433/868MHz Frequency Diversity .................................................................................. 15

3

Pin Definitions and Descriptions ............................................................................16

4

Technical Data..........................................................................................................20

4.1

Absolute Maximum Ratings ............................................................................................ 20

4.2

Normal Operating Conditions ......................................................................................... 20

4.3

DC Characteristics.......................................................................................................... 21

4.4

AC System Characteristics ............................................................................................. 22

4.5

External Components ..................................................................................................... 23