SBOU024C august 2004 – july 2023 PGA309
Ratiometric Scale scales the output range as a percentage of the supply voltage. For example, the ratiometric-scaled output of a bridge sensor can be set to the range of 10% to 90% of VS, shown in Figure 5-8. Figure 5-9 shows that as the supply voltage, VS, is lowered from +5V to +3V the range for VOUT of 10% to 90% of VS remains the same. The PGA309 accommodates both Absolute and Ratiometric scaling of bridge sensors.