ADFS7124-4 datasheet(44/93 Pages) AD

44 / 93 page

Data Sheet

ADFS7124-4

GETTING STARTED

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Rev. 0 | 44 of 93

Understanding Configuration Flexibility

In Figure 70, Figure 71, and Figure 72, the registers shown in black

font are programmed for this configuration. The registers shown in

gray font are redundant.

The most straightforward implementation of the ADFS7124-4 is to

use differential inputs with adjacent analog inputs and run all of

them with the same setup, gain correction, and offset correction

differential inputs: AIN0/ AIN1, AIN2/AIN3, AIN4/AIN5, and AIN6/

AIN7.

Programming the gain and offset registers is optional for any use

case, as indicated by the dashed lines between the register blocks.

If an internal or system offset or full-scale calibration is performed,

the gain and offset registers for the selected channel are automati-

cally updated.

An alternative way to implement these four fully differential inputs

is by taking advantage of the eight available setups. Motivation for

this includes having a different speed, noise, or gain requirement on

some of the four differential inputs vs. other inputs, or there may be

a specific offset or gain correction for particular channels. Figure 71

shows how each of the differential inputs can use a separate setup,

allowing full flexibility in the configuration of each channel.

Figure 70. Four Fully Differential Inputs, All Using a Single Setup (CONFIG_0, FILTER_0, GAIN_0, OFFSET_0)

Figure 71. Four Fully Differential Inputs with a Separate Setup per Channel

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