MAX31855 datasheet(3/13 Pages) MAXIM

Part #	MAX31855

Description	Cold-Junction Compensated Thermocouple-to-Digital Converter

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Manufacturer	MAXIM [Maxim Integrated Products]

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�� Maxim Integrated Products 3

MAX31855

Cold-Junction Compensated

Thermocouple-to-Digital Converter

THERMAL CHARACTERISTICS

(3.0V P VCC P 3.6V, TA = -40NC to +125NC, unless otherwise noted.) (Note 4)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

MAX31855K Thermocouple

Temperature Gain and Offset

Error (41.276FV/NC nominal

sensitivity) (Note 4)

TTHERMOCOUPLE = -200NC to +700NC,

TA = -20NC to +85NC (Note 3)

-2

+2

N

C

TTHERMOCOUPLE = +700NC to +1350NC,

TA = -20NC to +85NC (Note 3)

-4

+4

TTHERMOCOUPLE = -200NC to +1350NC,

TA = -40NC to +125NC (Note 3)

-6

+6

MAX31855J Thermocouple

Temperature Gain and Offset

Error (57.953FV/NC nominal

sensitivity) (Note 4)

TTHERMOCOUPLE = -40NC to +750NC,

TA = -20NC to +85NC (Note 3)

-2

+2

N

C

TTHERMOCOUPLE = -40NC to +750NC,

TA = -40NC to +125NC (Note 3)

-4

+4

MAX31855N Thermocouple

Temperature Gain and Offset

Error (36.256FV/NC nominal

sensitivity) (Note 4)

TTHERMOCOUPLE = -200NC to +700NC,

TA = -20NC to +85NC (Note 3)

-2

+2

N

C

TTHERMOCOUPLE = +700NC to +1300NC,

TA = -20NC to +85NC (Note 3)

-4

+4

TTHERMOCOUPLE = -200NC to +1300NC,

TA = -40NC to +125NC (Note 3)

-6

+6

MAX31855T Thermocouple

Temperature Gain and Offset

Error (52.18FV/NC nominal

sensitivity) (Note 4)

TTHERMOCOUPLE = -250NC to +400NC,

TA = -20NC to +85NC (Note 3)

-2

+2

N

C

TTHERMOCOUPLE = -250NC to +400NC,

TA = -40NC to +125NC (Note 3)

-4

+4

MAX31855E Thermocouple

Temperature Gain and Offset

Error (76.373FV/NC nominal

sensitivity) (Note 4)

TTHERMOCOUPLE = -40NC to +700NC,

TA = -20NC to +85NC (Note 3)

-2

+2

N

C

TTHERMOCOUPLE = +700NC to +900NC,

TA = -20NC to +85NC (Note 3)

-3

+3

TTHERMOCOUPLE = -40NC to +900NC,

TA = -40NC to +125NC (Note 3)

-5

+5

Thermocouple Temperature Data

Resolution

0.25

N

C

Internal Cold-Junction

Temperature Error

TA = -20NC to +85NC (Note 3)

-2

+2

N

C

TA = -40NC to +125NC (Note 3)

-3

+3

Cold-Junction Temperature Data

Resolution

TA = -40NC to +125NC

0.0625

N

C

Temperature Conversion Time

(Thermocouple, Cold Junction,

Fault Detection)

tCONV

(Note 5)

70

100

ms

Thermocouple Conversion

Power-Up Time

tCONV_PU (Note 6)

200

ms

*The parametric values (min, typ, max limits) shown in the Electrical Characteristics table supersede values quoted elsewhere in this data sheet.

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