What are the voltage threshold (logic) levels for the DIO signal?
A. The recommended levels are: 1V = low, and 4V = high. However, the real limits are VDD/2 ±0.5V. Restated, that is, 2V and 3V for VDD = 5V. • Q. Do I have to use a Wheatstone bridge-type sensor to utilize these signal conditioners? A. Any type of sensor can be used, as long as the sensor excitation and sensor output comply with the signal conditioner’s requirement. These signal conditioners operate on the differential input between the INP and INM pins. For example, the MAX1452 has been utilized in applications using 350Ω strain gauge. • Q. My sensor has very low impedance. Can I still use the MAX1452 as a signal conditioner? A. Yes. This can be achieved in more than one way. See Application Note 3396, Driving Strain-Gauge Bridge Sensors with Signal-Conditioning ICs as a reference. Contact the factory for assistance. • Q. My sensor has very high impedance. Can I still use the MAX1452 as a signal conditioner? A. Yes. The MAX1452 can be used in voltage-bridge-drive mode for this type of
