MAX6603 Datasheet, PDF (1/9 Pages) Maxim Integrated Products – Dual-Channel, Platinum RTD-to-Voltage Signal Conditioner

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 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 resis-
tors 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 ampli-
fies signals from two RTDs operating over the -40°C to
+1000°C temperature range and provides the tempera-
ture 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)
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 ana-
log voltage outputs can be readily connected to a vari-
ety of microcontrollers.
The MAX6603 is available in a small, 10-pin TDFN-EP
package and operates over the -40°C to +125°C auto-
motive temperature range from a single +3V to +5.5V
power supply.
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
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
Ordering Information
PART
MAX6603ATB+
PIN-PACKAGE
10 TDFN-EP*
RTD
200Ω**
PKG
CODE
T1033-1
Note: Device is specified over the -40°C to +125°C tempera-
ture range.
*EP = Exposed pad.
+Denotes lead-free package.
**Other base resistance values can be accommodated.
Contact the factory for more information.
TOP VIEW
Pin Configuration
V_CC 1 ⁺
RS2- 2
RS2+ 3
RS1+ 4
RS1- 5
MAX6603
10 DG2
9 OUT2
8 OUT1
7 DG1
6 GND
TDFN
3mm x 3mm x 0.8mm
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