Datasheet

UG-257 Evaluation Board User Guide
Rev. 0 | Page 8 of 20
ADC SETUP WINDOW
09727-009
Figure 9. ADC Setup Window
The ADC Setup window gives the user access to the AD7195
registers (see Figure 9). The user can write to the registers and
read from the registers. This window operates even when an
AD7195 evaluation board is not connected to the software. It
operates as an AD7195 configuration tool.
Buttons
ADC Reset
The ADC is reset to its default condition using this button.
ADC Read
Using this button allows the values of the registers on the
AD7195 to be read. The ADC Setup window displays the
hexadecimal values returned from the AD7195. Sections such
as Analog Inputs and Digital Filter are also updated to reflect
the AD7195 configuration.
ADC Wr ite
The information displayed in the Registers HEX section is
written to the AD7195.
Sections of the ADC Setup Window
Analog Inputs
Using the options within this section, the analog input channels
can be selected. Gain, polarity, chopping can also be selected.
The analog inputs can be buffered or unbuffered using the
Buffer drop-down menu. Finally, the Diagnostic drop-down
menu enables/disables the burnout currents.
Digital Filter
The output data rate, first filter notch, order of the sinc filter,
zero latency, and enabling/disabling the REJ60 bit are programmed
using the options within this section. The user can enter the
frequency of the first filter notch, and the software calculates
the value to be written to Bits FS[9:0] of the mode register.
Alternatively, the user can enter the FS[9:0] value in decimal,
and the software calculates the first filter notch. The user can
also select the sinc
3
/sinc
4
filter and enable/disable zero latency.
The value to be written to the AD7195 is displayed in the
Registers HEX section.
Clock Configuration
The clock to be used by the AD7195 is selected in this section.
When an external master clock is selected, the clock frequency
must be entered in the MHz text box.
Voltage Reference
The reference source and reference value are programmed in
this section. The user can enable/disable the reference detect
function and set the voltage of the reference.
When the reference setup is changed, the changes needed to
the Configuration Register are shown in the Registers HEX
section.