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AD7725 Datasheet(PDF) 9 Page - Analog Devices |
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AD7725 Datasheet(HTML) 9 Page - Analog Devices |
9 / 28 page REV. A AD7725 –9– PIN CONFIGURATION 3 4 5 6 7 1 2 10 11 8 9 40 39 38 41 42 43 44 36 35 34 37 29 30 31 32 33 27 28 25 26 23 24 PIN 1 IDENTIFIER TOP VIEW (Not to Scale) 12 13 14 15 16 17 18 19 20 21 22 SCR/DB13 SMODE0/DB14 SMODE1/DB15 SOE/CS SYNC DGND STBY AD7725 EFMT/DB2 ERR/DB1 SDI/DB0 CFMT/RS DVAL/INT DGND RD/ WR S/ P AGND1 AGND1 AVDD1 AVDD AGND UNI REF2 PIN FUNCTION DESCRIPTIONS Pin No. Mnemonic S/P Description 1 EFMT/DB2 Serial Mode. EFMT–Serial Clock Format, Logic Input. This clock format pin selects the clock edge to be used during configuration. When EFMT is low, Serial Data In is valid on the rising edge of SCO; when EFMT is high, Serial Data In is valid on the falling edge of SCO. During normal operation, this pin is ignored. Parallel Mode. DB2–Data Input/Output Bit. 2 ERR/DB1 Serial Mode. ERR–Configuration Error Flag, Logic Output. If an error occurs during configuration, this output goes low and is reset high by a pulse on the RESETCFG pin. Parallel Mode. DB1–Data Input/Output Bit. 3 SDI/DB0 Serial Mode. SDI–Serial Data Input. Serial data is shifted in to the AD7725 MSB first, in twos complement format, synchronous with SCO. Parallel Mode. DB0–Data Input/Output Bit (LSB). 4 CFMT/RS Serial Mode. CFMT–Serial Clock Format, Logic Input. This clock format pin selects the clock edge to be used during normal operation. When CFMT is low, Serial Data Out is valid on the rising edge of SCO; when CFMT is high, Serial Data Out is valid on the falling edge of SCO. During configuration, this pin is ignored. Parallel Mode. RS–Register Select. RS selects between the data register, used to read conversion data or write configuration data, and the instruction register. When RS is high, the status register can be read or an instruction can be written to the AD7725. When RS is low, data such as the configuration file can be written to the ADC while data such as the device ID or a conversion result can be read from the AD7725 (see Table I). |
Número de pieza similar - AD7725_15 |
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Descripción similar - AD7725_15 |
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