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AZT71_1301 Arkusz danych(PDF) 4 Page - Arizona Microtek, Inc

Numer części AZT71_1301
Szczegółowy opis  Programmable Capacitive Tuning IC
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Producent  AZM [Arizona Microtek, Inc]
Strona internetowa  http://azmicrotek.com
Logo AZM - Arizona Microtek, Inc

AZT71_1301 Arkusz danych(HTML) 4 Page - Arizona Microtek, Inc

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Arizona Microtek, Inc.
AZT71
Programmable Capacitive Tuning IC
www.azmicrotek.com
+1-480-962-5881
4
Request a Sample
Jan 2013, Rev 1.3
OSCILLATOR APPLICATION
In oscillator applications, the AZT71 is designed to be used in 2 phases, Programming and Operational.
In the Programming phase, the AZT71 is used by the manufacturer to set the capacitance value to control the desired
center frequency of the oscillator. The programming phase gives the manufacturer access to pins DA, CLK, and PV where
the shift registers are used to first determine the required control word. That control word is then stored in the EEPROM
memory. Arizona Microtek can provide the programming board (AZPB70) along with software that works through all the
programming steps/functions described in the next sections (Figure 4).
In the Operational phase, the EEPROM memory 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 5).
AZT71
Programming
Board
(AZPB70)
X1
DA
CLK
PV
DA
CLK
PV
VSS
VDD
RESONATOR
OUT
OSCILLATOR
Figure 4 – AZT71 in Programming Mode
AZT71
X1
DA
CLK
PV
VSS
VDD
RESONATOR
OUT
OSCILLATOR
NC
NC
NC
Figure 5 – AZT71 in Operational Mode


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