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ML5800DM датащи(PDF) 9 Page - Micro Linear Corporation |
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ML5800DM датащи(HTML) 9 Page - Micro Linear Corporation |
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9 / 25 page ![]() ML5800 DS5800-F-04 FINAL DATASHEET JULY 2006 9 3 PAON O (CMOS) PA Control Output. Enables the off-chip PA at the correct times in a Transmit slot. Goes high when transmit RF is present at TXO; goes low 5 μs before transmit RF is removed from TXO. This output has 5mA drivers suitable for driving pin diode switches directly. It also has optional interlock logic to disable the PA when the PLL is out of lock. 31 VSS VDD 3 PAON 8 9 FREF I (Analog) Input for the 12.288MHz or 6.144MHz reference frequency. This input is used as the reference frequency for the PLL and as a calibration frequency for the on-chip filters. An AC-coupled sine or square wave source drives this self-biased input. The reference source must be accurate to 20 PPM. 9 VSS FREF VCCA 24 8 40k 40k 11 QPO O (Analog) Charge Pump Output of the phase detector. This is connected to the external PLL loop filter. 10 VSS VCCPLL 11 QPO 8 15 VTUNE I (Analog) VCO Tuning Voltage input from the PLL loop filter. This pin is very sensitive to noise coupling and leakage currents. 13 VSS VCCB 3.7k 15 VTUNE 8 2.5V |
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