ZHCSGR1A August 2017 – January 2018 INA828
Figure 52 shows that the gain of the INA828 is set by a single external resistor, RG, connected between the RG pins (pins 1 and 8).
The value of RG is selected according to:
Table 1 lists several commonly-used gains and resistor values. The 50-kΩ term in Equation 1 comes from the sum of the two internal 25-kΩ feedback resistors. These on-chip resistors are laser-trimmed to accurate absolute values. The accuracy and temperature coefficients of these resistors are included in the gain accuracy and drift specifications of the INA828.
|DESIRED GAIN||RG (Ω)||NEAREST 1% RG (Ω)|
|2||50 k||49.9 k|
|5||12.5 k||12.4 k|
|10||5.556 k||5.49 k|
|20||2.632 k||2.61 k|
|50||1.02 k||1.02 k|