Maxim’s Sensor Interface Circuits

Here is a small collection of circuits that provide an interface to sensor transducers including pressure, temperature, and others.
ere’s a resistance temperature detector (RTD) interface circuit that is compatible with a range of standard RTD sensors including PT100. Output is digital via SPI bus.

This circuit provides a highly integrated analog sensor signal conditioner targeted for automotive applications. The device provides amplification, calibration, and temperature compensation. Output is digital.
Simple silicon pressure sensor to digital SPI bus interface. Nice solution for off board pressure sensor applications.
This circuit provides dual-channel, platinum RTD-to-voltage signal conditioning to achieve high-voltage, level-filtered signals for temperature measurements.
This circuit provides an interface from an analog temperature sensor to a 4-20mA current loop.
This precision circuit provides a highly integrated pressure transducer (wheatstone bridge) to current loop interface.
This circuit provides an interface between two 2-wire Hall-effect sensors and a low voltage microprocessor (µP) through either a digital output for Hall-effect switches or an analog output for linear information or both.
 
For more detail: Maxim’s Sensor Interface Circuits