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ADF4007BCP-REEL7 Datenblatt(PDF) 5 Page - Analog Devices |
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ADF4007BCP-REEL7 Datenblatt(HTML) 5 Page - Analog Devices |
5 / 16 page ADF4007 Rev. 0 | Page 5 of 16 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS 15 MUXOUT 14 M1 13 M2 12 N1 CPGND 1 AGND 2 AGND 3 11 N2 RFINB4 RFINA5 PIN1 INDICATOR TOPVIEW ADF4007 Figure 2. Pin Configuration Table 3. Pin Function Descriptions Pin No. Mnemonic Function 1 CPGND Charge Pump Ground. The ground return path of the charge pump. 2, 3 AGND Analog Ground. The ground return path of the prescaler. 4 RFINB Complementary Input to the RF Prescaler. This point must be decoupled to the ground plane with a small bypass capacitor, typically 100 pF. 5 RFINA Input to the RF Prescaler. This small signal input is ac-coupled to the external VCO. 6, 7 AVDD Analog Power Supply. This pin can range from 2.7 V to 3.3 V. Decoupling capacitors to the analog ground plane should be placed as close as possible to this pin. AVDD must be the same value as DVDD. 8 REFIN Reference Input. A CMOS input with a nominal threshold of VDD/2 and a dc equivalent input resistance of 100 kΩ. This input can be driven from a TTL or CMOS crystal oscillator, or it can be ac-coupled. 9, 10 DGND Digital Ground. 11, 12 N2, N1 These two bits set the N value. See Table 4. 13, 14 M2, M1 These two bits set the status of MUXOUT and PFD polarity. See Table 5. 15 MUXOUT This multiplexer output allows either the N divider output or the R divider output to be accessed externally. 16, 17 DVDD Digital Power Supply. This pin can range from 2.7 V to 3.3 V. Decoupling capacitors to the digital ground plane should be placed as close as possible to this pin. DVDD must be the same value as AVDD. 18 VP Charge Pump Power Supply. This pin should be greater than or equal to VDD. In systems where VDD is 3 V, it can be set to 5 V and used to drive a VCO with a tuning range of up to 5 V. 19 RSET Connecting a resistor between this pin and CPGND sets the maximum charge pump output current. The nominal voltage potential at the RSET pin is 0.66 V. The relationship between ICP and RSET is SET MAX CP R I 5 . 25 = Therefore, if RSET = 5.1 kΩ, then ICP = 5 mA. 20 CP Charge Pump Output. When enabled, this pin provides ±ICP to the external loop filter, which in turn drives the external VCO. |
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Ähnliche Beschreibung - ADF4007BCP-REEL7 |
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