EVALUATION KIT AVAILABLE
MAX6603
Dual-Channel, Platinum RTD-to-Voltage
Signal Conditioner
General Description
Features
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.
● 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
Ordering Information
PKG
CODE
PART
PIN-PACKAGE
RTD
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.
MAX6603ATB+
10 TDFN-EP*
200Ω**
T1033-1
Note: Device is specified over the -40°C to +125°C tempera-
ture range.
*EP = Exposed pad.
+Denotes a lead(Pb)-free/RoHS-compliant package.
**Other base resistance values can be accommodated.
Contact the factory for more information.
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
supply.
Pin Configuration
TOP VIEW
Applications
● Engine Control Management to Meet EURO IV
Regulations
● Braking Systems
● Industrial Temperature Sensors
● Food Transportation Monitoring Systems
● Industrial Process Measurements
+
V
1
2
3
4
5
10 DG2
CC
RS2-
RS2+
RS1+
RS1-
9
8
7
6
OUT2
OUT1
DG1
MAX6603
GND
TDFN
3mm x 3mm x 0.8mm
19-3975; Rev 1; 4/14