MAX31865 Просмотр технического описания (PDF) - Maxim Integrated
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MAX31865 Datasheet PDF : 25 Pages
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MAX31865
RTD-to-Digital Converter
ABSOLUTE MAXIMUM RATINGS
Voltage Range on VDD Relative to GND1.............-0.3V to +4.0V
Voltage Range on BIAS, REFIN+,
Continuous Power Dissipation (TA = +70NC)
TQFN (derate 34.5mW/NC above +70NC)...............2758.6mW
REFIN-, ISENSOR.................................. -0.3V to (VDD + 0.3V)
Voltage Range on FORCE+, FORCE2,
FORCE-, RTDIN+, RTDIN- Relative to GND1.....-50V to +50V
Voltage Range on DVDD Relative to DGND.........-0.3V to +4.0V
Voltage Range on All Digital Pins
Relative to DGND.............................. -0.3V to (VDVDD + 0.3V)
ESD Protection (all pins, Human Body Model)....................±2kV
Operating Temperature Range......................... -40NC to +125NC
Junction Temperature......................................................+150NC
Storage Temperature Range............................. -65NC to +150NC
Soldering Temperature (reflow).......................................+260NC
Lead Temperature (soldering,10s)..................................+300NC
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion 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.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
TQFN
Junction-to-Ambient Thermal Resistance (qJA)...........29°C/W
Junction-to-Case Thermal Resistance (qJC)..................2°C/W
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
RECOMMENDED DC OPERATING CONDITIONS
(TA = -40NC to +125NC, unless otherwise noted.) (Notes 2 and 3)
PARAMETER
SYMBOL
CONDITIONS
VDD
DVDD
VDD
VDVDD
Input Logic 0
VIL
CS, SDI, SCLK
Input Logic 1
Analog Voltages
(FORCE+,FORCE2, FORCE-,
RTDIN+, RTDIN-)
Reference Resistor
Cable Resistance
VIH
CS, SDI, SCLK
Normal conversion results
RREF
RCABLE
Per lead
MIN
3.0
3.0
-0.3
0.7 x
VDVDD
TYP
3.3
3.3
MAX
3.6
3.6
0.3 x
VDVDD
VDVDD
+ 0.3
UNITS
V
V
V
V
0
VBIAS
V
350
10k
I
0
50
I
ELECTRICAL CHARACTERISTICS
(3.0V P VDD P 3.6V, TA = -40NC to +125NC, unless otherwise noted. Typical values are TA= +25NC, VDD = VDVDD = 3.3V.) (Notes 2
and 3)
PARAMETER
ADC Resolution
ADC Full-Scale Input Voltage
(RTDIN+ - RTDIN-)
SYMBOL
CONDITIONS
No missing codes
MIN
TYP MAX UNITS
15
Bits
REFIN+ -
REFIN-
V
Maxim Integrated
2
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