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AD9870EB Datasheet(PDF) 4 Page - Analog Devices |
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AD9870EB Datasheet(HTML) 4 Page - Analog Devices |
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4 / 20 page  REV. 0 AD9870 –4– PIN FUNCTION DESCRIPTIONS Pin Mnemonic Description Pin Mnemonic Description 1 MXOP Mixer Output, Positive 25 PE Enable Input for SPI Port 2 MXON Mixer Output, Negative 26 VDDD Positive Power Supply for Internal Digital Functions 3 GNDF Ground for VGA 27 VDDH Positive Power Supply for Digital Interface 4 IF2N Second IF Input (to VGA), Negative 28 CLKOUT Clock Output for SSI Port 5 IF2P Second IF Input (to VGA), Positive 29 DOUTA Data Output for SSI Port 6 VDDF Positive Power Supply for Antialias Filter/VGA 30 DOUTB Data Output for SSI Port, Unused 7 GCP Filter Capacitor for VGA Gain Control, Positive 31 FS Frame Sync for SSI Port 8 GCN Filter Capacitor for VGA Gain Control, Negative 32 GNDH Ground for Digital Interface 9 VDDA Positive Power Supply for ADC 33 SYNCB Resets the SSI and Decimator Counters 10 GNDA Ground for ADC 34 GNDS Substrate Ground 11 VREFP Voltage Reference, Positive 35 FREF Reference Frequency Input for Both Synthesizers 12 VREFN Voltage Reference, Negative 36 GNDL Ground for LO Synthesizer 13 VCM Common-Mode Voltage (Requires 20 k Ω to GNDA) 37 GNDP Ground for LO Synthesizer Charge Pump 14 VDDQ Pos. Power Supply for Clock Synth. Charge Pump 38 IOUTL LO Synthesizer Charge Pump Output Current 15 IOUTC Clock Synthesizer Charge Pump Output Current 39 VDDP Positive Power Supply for LO Synth. Charge Pump 16 GNDQ Ground for Clock Synthesizer Charge Pump 40 VDDL Positive Power Supply for LO Synthesizer 17 VDDC Positive Power Supply for Clock Synthesizer 41 CXVM External Capacitor for Mixer Bias 18 GNDC Ground for Clock Synthesizer 42 LON LO Input to Mixer and LO Synthesizer, Negative 19 CLKP Sampling Clock Input/Clock VCO Tank, Positive 43 LOP LO Input to Mixer and LO Synthesizer, Positive 20 CLKN Sampling Clock Input/Clock VCO Tank, Negative 44 CXVL External Capacitor for Preamp Power Supply 21 GNDS Substrate Ground 45 GNDI Ground for Mixer and Preamp 22 GNDD Ground for Digital Functions 46 CXIF External Capacitor for Preamp Bias 23 PC Clock Input for SPI Port 47 IFIN First IF Input (to Preamp) 24 PD Data I/O for SPI Port 48 VDDI Positive Power Supply for Mixer and Preamp PIN CONFIGURATION 36 35 34 33 32 31 30 29 28 27 26 25 13 14 15 16 17 18 19 20 21 22 23 24 1 2 3 4 5 6 7 8 9 10 11 12 48 47 46 45 44 39 38 37 43 42 41 40 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 AD9870 VREFN PE |
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