TDA5200 View Datasheet(PDF) - Infineon Technologies

Part Name

Description

Manufacturer

TDA5200

ASK/FSK Single Conversion Receiver

Infineon Technologies 

TDA 5200

ASK Single Conversion Receiver

Applications

4.5

Data Slicer Threshold Generation

The threshold of the data slicer can be generated in two ways, depending on the signal coding scheme used. In

case of a signal coding scheme without DC content such as Manchester coding the threshold can be generated

using an external RC-Integrator as shown in Figure 9. The time constant TA of the RC-Integrator has to be

significantly larger than the longest period of no signal change TL within the data sequence. In order to keep

distortion low, the minimum value for R is 20 kΩ.

R

C

Pins: 19

data

filter

20

Uthreshold

data out

25

data slicer

Figure 9 Data Slicer Threshold Generation with External R-C Integrator

Another possibility for threshold generation is to use the peak detector in connection with two resistors and one

capacitor as shown in the following figure. The component values are depending on the coding scheme and the

protocol used.

R

C

R

Pins: 26 19

peak detector

20

Uthreshold

data out

25

data slicer

data

filter

Figure 10 Data Slicer Threshold Generation Utilizing the Peak Detector

Data Sheet

27

Revision 3.0, 2010-12-28

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