By proper selection of the gain paths, this ADC can be applied to the optimum dynamic range for all the

measuring applications. Table 15 shows values of ADG<5:0> for three frequently used applications.

Table 15. FS501 ADC Typical Gain Setting

First Scale Second Scale Third Scale

ADG<5:0>

01_0011

11_0111

11_1000



1.0



1.25



1.25



1.0



1.25



0.1

The transfer function for each scale is as follows,

Equation 4

r e f

x

R E F i

S I G i

x

v

v

G

G

D





The gains for the reference voltages and input voltages shown in Table 15 are approximate values. The

accurate gains for the reference voltages and input voltages can be found by careful calibration.