SBOS859B March 2018 – July 2018 INA1620
The INA1620 integrated resistor pairs use an advanced thin film process to create resistor pairs that have excellent matching. Each specific resistor pair is specifically designed for accurate matching between the two resistors. Figure 42 shows the distribution of resistor matching for a typical device population. The equation used to calculate matching between resistors in a pair is shown in Equation 5.
In addition to excellent matching between resistors in each resistor pair, all resistors on a single INA1620 achieve good matching due to inherent process matching across each device. Figure 52 shows a typical distribution of the worst-case matching across all resistors on a single INA1620. The matching was calculated using the highest value resistance on a device matched with the lowest resistance value on the same device.