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AD7764BRUZ Arkusz danych(PDF) 9 Page - Analog Devices |
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AD7764BRUZ Arkusz danych(HTML) 9 Page - Analog Devices |
9 / 21 page Preliminary Technical Data AD7764 Rev. PrC | Page 9 of 21 Pin Number Pin Mnemonic Description 12 SDO Serial Data Out. Address, Status and Data bits are clocked out on this line during each serial transfer. Each bit is clocked out on an SCO rising edge and valid on the falling edge. See the AD7764 Interface section for further details. 13 SDI Serial Data In. The first data bit (MSB) must be valid on the next SCO falling edge after the FSI event has been latched. 32 bits are required for each write; the first 16-bit word contains the device and register address and the second word contains the data. See the AD7764 Interface section for further details. 14 FSI Frame Sync In. The status of this pin is checked on the falling edge of SCO. If this pin is low then the first data bit is latched in on the next SCO falling edge. See the AD7764 Interface section for further details. 15 SYNC Synchronization Input. A falling edge on this pin resets the internal filter. This can be used to synchronize multiple devices in a system. See the AD7764 Interface section for further details. 16 RESET/PWDN When a logic low is sensed on this pin, the part is powered down and all internal circuitry is reset. 19 MCLK Master Clock Input. A low jitter digital clock must be applied to this pin. The output data rate will depend on the frequency of this clock. See Clocking the AD7764 Section for more details. 18 DEC_RATE This pin selects which of the three decimation modes the AD7764 operates. When logic high is applied to this pin, decimate by 64 mode is selected. Decimate by 128 mode is selected by if the pin is left floating. Decimate by 256 is selected when by applying logic low to the pin. |
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