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AZT71QG Datenblatt(PDF) 4 Page - Arizona Microtek, Inc |
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AZT71QG Datenblatt(HTML) 4 Page - Arizona Microtek, Inc |
4 / 14 page Arizona Microtek, Inc. AZT71 Programmable Capacitive Tuning IC www.azmicrotek.com +1-480-962-5881 4 Request a Sample May 2012, Rev 1.2 Figure 4 – AZT71 Capacitance Value Mapping AZT71 FUNCTIONAL MODES The AZT71 is designed to be used in 2 functional modes, Programming and Operational. In the Programming mode, the AZT71 is used by the manufacturer to set the capacitance value to control the desired center frequency of the oscillator. The programming mode uses either the shift registers or EEPROM (detailed later) and gives the manufacturer access to pins DA, CLK, and PV which allow the AZT71 to be programmed with an accompanying programming board (Figure 5). Arizona Microtek can provide this board (AZPB70) along with software that works through all the programming steps/functions described in the next sections. In the Operational mode, the EEPROM internal to the AZT71 has already been programmed with the desired factory settings. Pins DA, CLK, and PV are to be disconnected, thereby allowing the AZT71’s internal pull-downs to place the pins at ground potential. In the operational mode, only 3 pins are necessary for hookup (Figure 6). |
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