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MAX6603 Datasheet

Platinum RTD-to-Voltage Signal Conditioner

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MAX6603
EVALUATION KIT AVAILABLE
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 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
supply.
Applications
● 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
PIN-PACKAGE
RTD
PKG
CODE
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.
Pin Configuration
TOP VIEW
VCC 1 +
RS2- 2
RS2+ 3
MAX6603
RS1+ 4
RS1- 5
10 DG2
9 OUT2
8 OUT1
7 DG1
6 GND
TDFN
3mm x 3mm x 0.8mm
19-3975; Rev 1; 4/14


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX6603 Datasheet

Platinum RTD-to-Voltage Signal Conditioner

No Preview Available !

MAX6603
Dual-Channel, Platinum RTD-to-Voltage
Signal Conditioner
Absolute Maximum Ratings
(All voltages referenced to GND, unless otherwise noted.)
VCC........................................................................-0.3V to +6.0V
RS1+, RS1-, RS2+, RS2-....................................-0.3V to +18.0V
OUT1, OUT2, DG1, DG2.......................... -0.3V to (VCC + 0.3V)
Continuous Power Dissipation (TA = +70°C)
10-Pin TDFN Single-Layer Board
(derate 18.5 mW/°C above +70°C).........................1481.5mW
10-Pin TDFN Multilayer Board
(derate 24.4 mW/°C above +70°C).........................1951.2mW
ESD Protection (OUT1, OUT2, DG1, DG2,
Human Body Model).......................................................>±2kV
ESD Protection (RS1+, RS2+, RS1-, RS2-,
VCC, GND, Human Body Model)...................................>±5kV
Operating Temperature Range.......................... -40°C to +125°C
Junction Temperature.......................................................+150°C
Storage Temperature Range............................. -65°C to +150°C
Lead Temperature (soldering, 10s).................................. +300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Electrical Characteristics
(VCC = 3.0V to 5.5V, resistor connected between RS1+ and RS1- = 560Ω, resistor connected between RS2+ and RS2- = 560Ω,
TA = -40°C to +125°C, unless otherwise noted. Typical values are at VCC = 5.0V, RL = 47kΩ between OUT_ and GND, TA = +25°C.)
(Note 1)
PARAMETER
Supply Voltage
Input Over Voltage
SYMBOL
VCC
VRS
CONDITIONS
RS1+, RS1-, RS2+, RS2-
Supply Current
ICC
CURRENT SOURCES
Excitation Current
Excitation-Current Temperature
Coefficient
IEXC
TCIEXC
Minimum RS_- Voltage
VRS_-
Maximum RS_+ Voltage
VRS_+
Supply Ratiometric
IRATIO
MAXIMUM TEMPERATURE ERROR (Note 3)
RTD
Sink current during overvoltage fault
VRS1+ = VRS1 - = VRS2+ = VRS2- = +16V
(Note 2)
(Note 2)
VCC = +3V to +5.5V
+400°C to +600°C, VCC = 5.0V
-40°C to +400°C, VCC = 5.0V
+600°C to +1000°C, VCC = 5.0V
+400°C to +600°C, VCC = 3.0V
-40°C to +400°C, VCC = 3.0V
+600°C to +1000°C, VCC = 3.0V
MIN
3.0
0.58
TYP
3.9
36.2
MAX
5.5
16
5.5
47.1
UNITS
V
V
mA
1.0 1.12 mA
-7 ppm/°C
3.4 V
4.0 V
0.2 mA/V
±6
±8
±12
±10
±13.3
±20
°C
www.maximintegrated.com
Maxim Integrated 2


Part Number MAX6603
Description Platinum RTD-to-Voltage Signal Conditioner
Maker Maxim Integrated Products
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MAX6603 Datasheet PDF






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