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ADF4350BCPZ-RL Datenblatt(PDF) 7 Page - Analog Devices |
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ADF4350BCPZ-RL Datenblatt(HTML) 7 Page - Analog Devices |
7 / 28 page ADF4350 Rev. 0 | Page 7 of 28 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS 1 CLK 2 DATA 3 LE 4 CE 5 SW 6 7 24 VREF 23 VCOM 22 21 20 19 18 17 8 ADF4350 TOP VIEW (Not to Scale) PIN 1 INDICATOR VP CPOUT CPGND RSET VTUNE AGNDVCO AGNDVCO TEMP VVCO NOTES 1. THE LFCSP HAS AN EXPOSED PADDLE THAT MUST BE CONNECTED TO GND. Figure 3. Pin Configuration Table 4. Pin Function Descriptions Pin No. Mnemonic Description 1 CLK Serial Clock Input. Data is clocked into the 32-bit shift register on the CLK rising edge. This input is a high impedance CMOS input. 2 DATA Serial Data Input. The serial data is loaded MSB first with the three LSBs as the control bits. This input is a high impedance CMOS input. 3 LE Load Enable, CMOS Input. When LE goes high, the data stored in the shift register is loaded into the register that is selected by the three LSBs. 4 CE Chip Enable. A logic low on this pin powers down the device and puts the charge pump into three-state mode. A logic high on this pin powers up the device depending on the status of the power-down bits. 5 SW Fast-Lock Switch. A connection should be made from the loop filter to this pin when using the fast-lock mode. 6 VP Charge Pump Power Supply. This pin is to be equal to AVDD. Decoupling capacitors to the ground plane are to be placed as close as possible to this pin. 7 CPOUT Charge Pump Output. When enabled, this provides ±ICP to the external loop filter. The output of the loop filter is connected to VTUNE to drive the internal VCO. 8 CPGND Charge Pump Ground. This is the ground return pin for CPOUT. 9 AGND Analog Ground. This is a ground return pin for AVDD. 10 AVDD Analog Power Supply. This pin ranges from 3.0 V to 3.6 V. Decoupling capacitors to the analog ground plane are to be placed as close as possible to this pin. AVDD must have the same value as DVDD. 11, 18, 21 AGNDVCO VCO Analog Ground. These are the ground return pins for the VCO. 12 RFOUTA+ VCO Output. The output level is programmable. The VCO fundamental output or a divided down version is available. 13 RFOUTA− Complementary VCO Output. The output level is programmable. The VCO fundamental output or a divided down version is available. 14 RFOUTB+ Auxilliary VCO Output. The output level is programmable. The VCO fundamental output or a divided down version is available. 15 RFOUTB− Complementary Auxilliary VCO Output. The output level is programmable. The VCO fundamental output or a divided down version is available. 16, 17 VVCO Power Supply for the VCO. This ranges from 3.0 V to 3.6 V. Decoupling capacitors to the analog ground plane should be placed as close as possible to these pins. VVCO must have the same value as AVDD. 19 TEMP Temperature Compensation Output. Decoupling capacitors to the ground plane are to be placed as close as possible to this pin. 20 VTUNE Control Input to the VCO. This voltage determines the output frequency and is derived from filtering the CPOUT output voltage. |
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Ähnliche Beschreibung - ADF4350BCPZ-RL |
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