EVALUATION KIT AVAILABLE
Dual-Channel, Platinum RTD-to-Voltage
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 convert-
ers (ADCs). External precision resistors and calibration
processes are not needed. The MAX6603 provides the
necessary signal-conditioning functions, including ratio-
metric excitation current, amplification, buffered voltage
outputs, diagnostic fault detections, and input protection.
The MAX6603 amplifies signals from two RTDs operat-
ing 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 ±5kV electrostatic discharge (ESD) pro-
tection 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 automo-
tive temperature range from a single +3V to +5.5V power
●● Engine Control Management to Meet EURO IV
●● Braking Systems
●● Industrial Temperature Sensors
●● Food Transportation Monitoring Systems
●● Industrial Process Measurements
●● 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
●● 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
MAX6603ATB+ 10 TDFN-EP*
Note: Device is specified over the -40°C to +125°C tempera-
*EP = Exposed pad.
+Denotes a lead(Pb)-free/RoHS-compliant package.
**Other base resistance values can be accommodated.
Contact the factory for more information.
VCC 1 +
3mm x 3mm x 0.8mm
19-3975; Rev 1; 4/14