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STW82102B Datasheet(PDF) 60 Page - STMicroelectronics |
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STW82102B Datasheet(HTML) 60 Page - STMicroelectronics |
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60 / 67 page  Application information STW82102B 60/67 Doc ID 018516 Rev 2 11.5 External VCO standard mode operation The STW82102B can be used in Ext VCO Mode for both RX path and TX observation path (RX Chain ON, Synthesizer ON, EXT VCO/LO buffer ON and with an external VCO). In such a case the 10-bit internal DAC can drive an external PIN diode attenuator in order to calibrate the signal level at the input of the device. Figure 29. External VCO standard mode operation RF_IN2 I_PINDRV1 I_PINDRV2 RF_IN RF_VSS RF_CT MIXDRV_CT DAC MIX STW82102B RF_IN DRV 5V IF AMP DBUS BUF DBUS_SEL SDA/DATA SCL/CLK LOAD LOCK_DET 4:1 IF_OUT 50 Ω 5V REXT_CP REF_CLK CHP PFD UP DN PLL ICP EXT IF_OUTP IF_OUTN EXTERNAL VCO EXTVCO_INP EXTVCO_INN LO/VCO BUF |
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