MAX6603 Datasheet | Maxim Integrated

19-3975; Rev 0; 4/06 Dual-Channel, Platinum RTD-to-Voltage Signal Conditioner General Description The MAX6603 dual-channel, platinum RTD-to-voltage signal conditioner excites and amplifies the signal from two external 200 Ω 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 analogto-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. The MAX6603 has overvoltage protection up to +16V on RTD inputs, and ±5k V electrostatic discharge (ESD) protection at RTD input pins for reliable operation where RTD temperature-sensing probes are used. The MAX6603 monitors the RTD for faults and asserts the respective DG output low for fault conditions. The analog voltage outputs can be readily connected to a variety of microcontrollers. The MAX6603 is available in a small, 10-pin TDFN-EP package and operates over the -40°C to +125°C automotive temperature range from a single +3V to +5.5V power supply. - ±5k V 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 Features - Amplifies Pt RTD Temperature...