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AD9874EB Datasheet(PDF) 5 Page - Analog Devices |
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AD9874EB Datasheet(HTML) 5 Page - Analog Devices |
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5 / 40 page  REV. 0 AD9874 –5– PIN CONFIGURATION 36 35 34 33 32 31 30 29 28 27 26 25 1 2 3 4 5 6 7 8 9 10 11 12 48 47 46 45 44 39 38 37 43 PIN 1 IDENTIFIER TOP VIEW (Not to Scale) GNDL FREF GNDS SYNCB GNDH FS DOUTB MXOP MXON GNDF IF2N IF2P VDDF GCP GCN VDDA GNDA VREFP DOUTA CLKOUT VDDH VDDD AD9874 VREFN PE 40 41 42 13 19 18 17 16 15 14 20 21 22 23 24 PIN FUNCTION DESCRIPTIONS Pin Mnemonic Description 1 MXOP Mixer Output, Positive 2MXON Mixer Output, Negative 3 GNDF Ground for Front End of ADC 4IF2N Second IF Input (to ADC), Negative 5 IF2P Second IF Input (to ADC), Positive 6 VDDF Positive Power Supply for Front End of ADC 7 GCP Filter Capacitor for ADC Full-Scale Control 8 GCN Full-Scale Control Ground 9 VDDA Positive Power Supply for ADC Back End 10 GNDA Ground for ADC Back End 11 VREFP Voltage Reference, Positive 12 VREFN Voltage Reference, Negative 13 RREF Reference Resistor: Requires 100 k Ω to GNDA 14 VDDQ Positive Power Supply for Clock Synthesizer 15 IOUTC Clock Synthesizer Charge Pump Output Current 16 GNDQ Ground for Clock Synthesizer Charge Pump 17 VDDC Positive Power Supply for Clock Synthesizer 18 GNDC Ground for Clock Synthesizer 19 CLKP Sampling Clock Input/Clock VCO Tank, Positive 20 CLKN Sampling Clock Input/Clock VCO Tank, Negative 21 GNDS Substrate Ground 22 GNDD Ground for Digital Functions 23 PC Clock Input for SPI Port 24 PD Data I/O for SPI Port 25 PE Enable Input for SPI Port 26 VDDD Positive Power Supply for Internal Digital Functions 27 VDDH Positive Power Supply for Digital Interface 28 CLKOUT Clock Output for SSI Port 29 DOUTA Data Output for SSI Port 30 DOUTB Data Output for SSI Port (Inverted) or SPI Port 31 FS Frame Sync for SSI Port 32 GNDH Ground for Digital Interface 33 SYNCB Resets SSI and Decimator Counters; Active Low 34 GNDS Substrate Ground 35 FREF Reference Frequency Input for Both Synthesizers 36 GNDL Ground for LO Synthesizer 37 GNDP Ground for LO Synthesizer Charge Pump 38 IOUTL LO Synthesizer Charge Pump Output Current Charge Pump 39 VDDP Positive Power Supply for LO Synthesizer Charge Pump 40 VDDL Positive Power Supply for LO Synthesizer 41 CXVM External Filter Capacitor; DC Output of LNA 42 LON LO Input to Mixer and LO Synthesizer, Negative 43 LOP LO Input to Mixer and LO Synthesizer, Positive 44 CXVL External Bypass Capacitor for LNA Power Supply 45 GNDI Ground for Mixer and LNA 46 CXIF External Capacitor for Mixer V-I Converter Bias 47 IFIN First IF Input (to LNA) 48 VDDI Positive Power Supply for LNA and Mixer Pin Mnemonic Description |
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