EVAL-AD7760/AD7762EDZ

Rev. PrB | Page 12 of 23

Figure 15. User-defined filter example – implemented on evaluation board. See indicators illuminated, and custom filter transition band.

WRITING TO GAIN, OFFSET & OVERRANGE

REGISTERS

17. The EVAL-AD7760/2EDZ board allows the user to write to

the on-board registers for control of gain correction, offset

correction, and the setting of the overrange flag.

18. As an example of this, the default value of the gain

correction register, 1.25 can be changed to a value of 1.00.

Do this by setting the value in the WR_GAIN text box to

1.00. Click on the white WR_GAIN switch on the front

panel in order to write to the gain register.

19. To check that the value has been written correctly click on

the white RD_GAIN switch on the front panel and the

value of the AD7760/2 gain register will be shown in the

RD_GAIN indicator box.

Figure 16.Overrange, Gain, Offset register Write and Read functions.

Change in the filter transition band for custom filter

Status Bits Indicate:

DL_OK – Asserted

FILT_OK – Asserted

UFILT – Asserted

These show that a user

defined filter is in use, that

it was downloaded

correctly.