EVAL-AD7719EB Analog Devices Inc, EVAL-AD7719EB Datasheet - Page 28

• Manufacturer Part Number: EVAL-AD7719EB
• Description: BOARD EVAL FOR AD7719
• Manufacturer: Analog Devices Inc

Specifications of EVAL-AD7719EB

• Rohs Status: RoHS non-compliant
• Number Of Adc's: 2
• Number Of Bits: 24
• Sampling Rate (per Second): 105
• Data Interface: Serial
• Inputs Per Adc: 3 Single Ended
• Input Range: 2 Vpp
• Power (typ) @ Conditions: 4.85mW @ 105SPS
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: AD7719

BIPOLAR/UNIPOLAR OPERATION, AND INPUT RANGE
ADC, SELECT THE INPUT CHANNEL, WORD LENGTH,
WRITE TO AD1CON REGISTER ENABLING THE MAIN
WRITE TO AD1CON REGISTER ENABLING THE AUX
CONFIGURE AND INITIALIZE C/ P SERIAL PORT
WRITE TO COMMUNICATIONS REGISTER SETTING
WRITE TO COMMUNICATIONS REGISTER SETTING
WRITE TO COMMUNICATIONS REGISTER SETTING
UP NEXT OPERATION TO BE A WRITE TO THE MAIN
AD7719
UP NEXT OPERATION TO BE A WRITE TO THE AUX
WRITE TO THE IOCON REGISTER TO CONFIGURE
CHANNEL ADC CONTROL REGISTER (AD1CON)
CHANNEL ADC CONTROL REGISTER (AD0CON)
SETTING UP NEXT OPERATION TO BE A WRITE
SETTING UP NEXT OPERATION TO BE A WRITE
ADC, SELECT THE INPUT CHANNEL BIPOLAR/
SELECTING NEXT OPERATION TO BE A WRITE
WRITE TO THE COMMUNICATIONS REGISTER
WRITE TO THE COMMUNICATIONS REGISTER
WRITE TO THE COMMUNICATIONS REGISTER
THE CURRENT SOURCES, DIGITAL I/O PORT,
UP NEXT OPERATION TO BE A WRITE TO THE
UNIPOLAR OPERATION AND INPUT RANGE
HARDWARE
WRITE TO FILTER REGISTER CONFIRMING
WRITE TO MODE REGISTER SELECTING
WRITE TO MODE REGISTER SELECTING
POLLING
Figure 11. Flowchart for Initializing, Calibrating, and Reading Data from the AD7719 Main and Aux Channels
POWER-ON/RESET FOR AD7719
THE REQUIRED UPDATE RATE
ZERO-SCALE CALIBRATION
FULL-SCALE CALIBRATION
TO THE IOCON REGISTER
TO THE MODE REGISTER
NO
TO THE MODE REGISTER
AND POWER SWITCHES
FILTER REGISTER
POLL RDY PIN
HARDWARE
POLLING
START
LOW?
RDY
YES
SOFTWARE
POLLING
WRITE TO THE COMMUNICATIONS REGISTER SETTING
WRITE TO THE COMMUNICATIONS REGISTER SETTING
UP NEXT OPERATION TO BE A READ FROM THE
UP NEXT OPERATION TO BE A READ FROM THE
SETTING UP NEXT OPERATION TO BE A WRITE
SETTING UP NEXT OPERATION TO BE A WRITE
WRITE TO THE COMMUNICATIONS REGISTER
WRITE TO THE COMMUNICATIONS REGISTER
WRITE TO THE COMMUNICATIONS REGISTER
WRITE TO MODE REGISTER SELECTING
WRITE TO MODE REGISTER SELECTING
SETTING UP NEXT OPERATION TO BE A
READ FROM DATA REGISTER (AD0)
READ FROM DATA REGISTER (AD0)
CONTINUOUS CONVERSION MODE
READ FROM THE MODE REGISTER
MAIN ADC DATA REGISTER (AD0)
AUX ADC DATA REGISTER (AD1)
READ FROM MODE REGISTER
FULL-SCALE CALIBRATION
NO
TO THE MODE REGISTER
NO
NO
NO
TO THE MODE REGISTER
POLL RDY PIN
POLL RDY PIN
POLL RDY PIN
SOFTWARE
POLLING
MD BITS
= 001?
LOW?
LOW?
LOW?
–28–
RDY
RDY
RDY
YES
YES
YES
YES
WRITE TO THE COMMUNICATIONS REGISTER SETTING
WRITE TO THE COMMUNICATIONS REGISTER SETTING
SETTING UP NEXT OPERATION TO BE A READ
SETTING UP NEXT OPERATION TO BE A READ
WRITE TO THE COMMUNICATIONS REGISTER
WRITE TO THE COMMUNICATIONS REGISTER
SETTING UP NEXT OPERATION TO BE A WRITE
SETTING UP NEXT OPERATION TO BE A WRITE
WRITE TO THE COMMUNICATIONS REGISTER
WRITE TO THE COMMUNICATIONS REGISTER
WRITE TO THE COMMUNICATIONS REGISTER
OF THE MAIN ADC DATA REGISTER (AD0)
OF THE AUX ADC DATA REGISTER (AD1)
UP NEXT OPERATION TO BE A READ OF
UP NEXT OPERATION TO BE A READ OF
SETTING UP NEXT OPERATION TO BE A
WRITE TO MODE REGISTER SELECTING
WRITE TO MODE REGISTER SELECTING
READ FROM THE MODE REGISTER
CONTINUOUS CONVERSION MODE
CONTINUOUS CONVERSION MODE
READ FROM MODE REGISTER
READ STATUS REGISTER
READ STATUS REGISTER
NO
TO THE MODE REGISTER
TO THE MODE REGISTER
NO
NO
STATUS REGISTER
STATUS REGISTER
RDY1 = 1?
RDY0 = 1?
READ AD0
READ AD1
MD BITS
= 001?
YES
YES
YES
REV. A