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ADF7010 Arkusz danych(PDF) 6 Page - Analog Devices |
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ADF7010 Arkusz danych(HTML) 6 Page - Analog Devices |
6 / 20 page REV. 0 –6– ADF7010 PIN FUNCTION DESCRIPTIONS (continued) Pin No. Mnemonic Function 15 OSC1 Oscillator Pin. For use with crystal reference only. This is three-stated when an external reference oscillator is used. 16 VCOGND Voltage Controlled Oscillator Ground 17 TEST Input to the RF fractional-N divider. This pin allows the user to connect an external VCO to the part. Disabling the internal VCO activates this pin. If the internal VCO is used, this pin should be grounded. 18 DVDD Positive Supply for the Digital Circuitry. This must be between 2.3 V and 3.6 V. Decoupling capacitors to the analog ground plane should be placed as close as possible to this pin. 19 RFGND Ground for Output Stage of Transmitter 20 RFOUT The modulated signal is available at this pin. Output power levels are from –16 dBm to +12 dBm. The output should be impedance matched to the desired load using suitable components. See the Output RF Stage section. 21 AGND Ground Pin for the RF Analog Circuitry 22 VCOIN The tuning voltage on this pin determines the output frequency of the Voltage Controlled Oscillator (VCO). The higher the tuning voltage the higher the output frequency. 23 CVCO A 0.22 mF capacitor should be added to reduce noise on VCO bias lines. Tied to CREG pin. 24 CREG A 2.2 mF capacitor should be added at CREG to reduce regulator noise and improve stability. A reduced capacitor will improve regulator power-on time but may cause higher spurious components. |
Podobny numer części - ADF7010 |
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Podobny opis - ADF7010 |
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