SBOU024C august 2004 – july 2023 PGA309
In Figure 3-3, G0−G7 are the exact desired settings at T0−T7, respectively, for the Gain DAC. GM1−GM7 are the slopes of the piecewise linear curves that connect G0 to G1, G1 to G2, G2 to G3, G3 to G4, G4 to G5, G5 to G6, and G6 to G7. This example demonstrates how the Lookup Table is constructed and how the Lookup Logic with Linear Interpolation Algorithm accurately calculates the setting for the Gain DAC at TREAD = 25°C. Note that TREAD = 25°C does not fall on an exact data point (Tx, Gx). Temperature coefficients for both the Gain DAC and the Zero DAC are calculated to complete the Lookup Table.
Given:
Find:
Gain DAC slope factors (GMi) and Zero DAC slope factors (ZMi).