General Description
The MAX6603 dual-channel, platinum RTD-to-voltage signal conditioner excites and amplifies the signal from two external 200Ω platinum-resistive temperature devices (Pt RTD) to achieve high-voltage, level-filtered signals for temperature measurements. The MAX6603 provides a direct ratiometric output voltage to simplify the interface to microcontrollers with integrated analog to-digital converters (ADCs). External precision resistors and calibration processes are not needed. The MAX6603 provides the necessary signal-conditioning functions, including ratiometric excitation current, amplification, buffered voltage outputs, diagnostic fault detections, and input protection. The MAX6603 amplifies signals from two RTDs operating over the -40°C to +1000°C temperature range and provides the temperature information as two independent analog voltages. The MAX6603 features a ±6°C (max) accuracy over the +400°C to +600°C temperature range.

Features
♦ Amplifies Pt RTD Temperature Signals
♦ ±5kV ESD Protection on RTD Inputs
♦ +16V Overvoltage Fault Protection on RTD Inputs
♦ Low RTD Excitation Current Minimizes Self Heating Errors
♦ Small, 10-Pin TDFN Package
♦ Fully Ratiometric Operation
♦ No Calibration Required for Standard RTDs
♦ RTD Diagnostic Check
♦ High Accuracy: ±6°C (max) from +400°C to +600°C

Applications
Automotive Exhaust Temperature Monitoring
Engine Control Management to Meet EURO IV
Regulations
Braking Systems
Industrial Temperature Sensors
Food Transportation Monitoring Systems
Industrial Process Measurements