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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AD9874ABST датащи(PDF) 6 Page - Analog Devices |
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AD9874ABST датащи(HTML) 6 Page - Analog Devices |
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6 / 40 page  REV. A AD9874 –6– 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 Function. 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 Con- verter Bias. 47 IFIN First IF Input (to LNA). 48 VDDI Positive Power Supply for LNA and Mixer. Pin Mnemonic Description |
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