SBOU024C august 2004 – july 2023 PGA309
Equation 1 shows the mathematical expression that is used to compute the output voltage, VOUT. This equation can also be rearranged algebraically to solve for different terms. For example, during calibration, this equation is rearranged to solve for VIN.
Where:
mux_sign: This term changes the polarity of the input signal; value is ±1.
VIN: The input signal for the PGA309; VIN1 = VINP, VIN2 = VINN.
VCoarse_Offset: The coarse offset DAC output voltage.
GI: Input stage gain.
VZero_DAC: Zero DAC output voltage.
GD: Gain DAC.
GO: Output stage gain.