MAX6603 データシートの表示（PDF） - Maxim Integrated

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MAX6603

Dual-Channel, Platinum RTD-to-Voltage Signal Conditioner

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 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

VCC 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

________________________________________________________________ Maxim Integrated Products 1

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

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