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AD7755 データシート(PDF) 6 Page - Analog Devices |
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AD7755 データシート(HTML) 6 Page - Analog Devices |
6 / 16 page REV. B AD7755 –6– Pin No. Mnemonic Description 21 DGND This provides the ground reference for the digital circuitry in the AD7755, i.e., multiplier, filters and digital-to-frequency converter. This pin should be tied to the analog ground plane of the PCB. The digital ground plane is the ground reference for all digital circuitry, e.g., counters (mechanical and digital), MCUs and indicator LEDs. For good noise suppression the analog ground plane should only be connected to the digital ground plane at one point only, e.g., a star ground. 22 CF Calibration Frequency Logic Output. The CF logic output gives instantaneous real power informa- tion. This output is intended to be used for calibration purposes. Also see SCF pin description. 23, 24 F2, F1 Low Frequency Logic Outputs. F1 and F2 supply average real power information. The logic outputs can be used to directly drive electromechanical counters and two phase stepper motors. See Transfer Function section. PIN CONFIGURATION DIP and SSOP Packages TOP VIEW (Not to Scale) 24 23 22 21 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 9 10 11 12 AD7755 NC = NO CONNECT DVDD AC/ DC AVDD NC F1 V1P V1N V2N V2P RESET REFIN/OUT AGND SCF F2 CF DGND REVP NC CLKOUT CLKIN G0 G1 S0 S1 OBSOLETE |
同様の部品番号 - AD7755_15 |
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同様の説明 - AD7755_15 |
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