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TDA5100A Scheda tecnica(PDF) 11 Page - Infineon Technologies AG |
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TDA5100A Scheda tecnica(HTML) 11 Page - Infineon Technologies AG |
11 / 29 page Functional Description 3 - 4 TDA 5100A preliminary Wireless Components Specification, March 2001 5 DATA Digital amplitude modulation can be imparted to the Power Amplifier through this pin. A logic high (DATA > 1.5 V or open) enables the Power Amplifier. A logic low (DATA < 0.5 V) disables the Power Amplifier. 6 CLKOUT Clock output to supply an external device. An external pull-up resistor has to be added in accordance to the driving requirements of the external device. The clock output frequency is 3.39 MHz when a crystal of 13.56 MHz is used. 7 COSC This pin is connected to the reference oscil- lator circuit. The reference oscillator is working as a neg- ative impedance converter. It presents a negative resistance in series to an induc- tance at the COSC pin. The resonance frequency of the crystal should be 13.56 MHz to achieve an output frequency of 434 MHz. + 1 .2 V 90 k Ω 5 50 pF 30 A 60 k Ω +1 .1 V 6 300 Ω 6 k 7 100 A V S |
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