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TDA5251F1 Datasheet(PDF) 65 Page - Infineon Technologies AG |
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TDA5251F1 Datasheet(HTML) 65 Page - Infineon Technologies AG |
65 / 88 page TDA5251 F1 Version 1.0 Application Preliminary Specification 65 2003-02-18 Confidential PKD_PWDN.wmff Figure 3-27 Peak detector - power down mode PkD_PWDN3.wmf Figure 3-28 Power down mode 3.7 Data Valid Detection In order to detect valid data two criteria must be fulfilled. One criteria is the data rate, which can be set in register 06h and 07h. The other one is the received RF power level, which can be set in register 08h in form of the RSSI threshold voltage. Thus for using the data valid detection FSK modulation is recommended. + Peak Detector - Peak Detector 12 13 14 PDP SLC PDN Data Filter 100k 100k Vcc C P C N off off Power Down Mode R1 R2 Logic 0V Vcc Vcc Neg. Peak Detector (pin12) Signal t Threshold (pin14) Pos. Peak Detector (pin13) Power ON Power Down Vcc 0 Peak Detector Power ON Data Signal Power ON 2,2ms |
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