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AD7707 Datasheet(PDF) 39 Page - Analog Devices

Part No. AD7707
Description  3-Channel 16-Bit, Sigma-Delta ADC
Download  53 Pages
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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AD7707 Datasheet(HTML) 39 Page - Analog Devices

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AD7707
Rev. B | Page 38 of 52
POWER-ON/RESET FOR AD7707
CONFIGURE AND INITIALIZE MICROCONVERTER/
MICROPROCESSOR SERIAL PORT
WRITE TO COMMUNICATIONS REGISTER SELECTING
CHANNEL AND SETTING UP NEXT OPERATION TO BE A
WRITE TO THE CLOCK REGISTER (20 HEX)
WRITE TO CLOCK REGISTER SETTING THE CLOCK
BITS IN ACCORDANCE WITH THE APPLIED MASTER
CLOCK SIGNAL AND SELECT UPDATE RATE FOR
SELECTED CHANNEL (0C HEX)
WRITE TO COMMUNICATIONS REGISTER SELECTING
CHANNEL AND SETTING UP NEXT OPERATION TO BE A
WRITE TO THE SETUP REGISTER (10 HEX)
WRITE TO SETUP REGISTER CLEARING F SYNC,
SETTING UP GAIN, OPERATING CONDITIONS AND
INITIATING A SELF-CALIBRATION ON SELECTED
CHANNEL (40 HEX)
POLL DRDY PIN
NO
YES
WRITE TO COMMUNICATIONS REGISTER SETTING UP
NEXT OPERATION TO BE A READ FROM THE DATA
REGISTER (38 HEX)
READ FROM DATA REGISTER
WRITE TO COMMUNICATIONS REGISTER SETTING UP NEXT
OPERATION TO BE A READ FROM THE COMMUNICATIONS
REGISTER (08 HEX)
READ FROM COMMUNICATIONS REGISTER
POLL DRDY BIT OF COMMUNICATIONS REGISTER
WRITE TO COMMUNICATIONS REGISTER SETTING UP
NEXT OPERATION TO BE A READ FROM THE DATA
REGISTER (38 HEX)
START
READ FROM DATA REGISTER
DRDY
LOW?
NO
YES
DRDY
LOW?
Figure 22. Flowchart for Setting Up and Reading from the AD7707


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