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MAX31855

Cold-Junction Compensated

Thermocouple-to-Digital Converter

Pin Description

Pin Configuration

Block Diagram

PIN

NAME

FUNCTION

1

GND

Ground

2

T-

Thermocouple Input. See Table 1. Do

not connect to GND.

3

T+

Thermocouple Input. See Table 1.

4

Power-Supply Voltage

5

SCK

Serial-Clock Input

6

CS

Active-Low Chip Select. Set CS low to

enable the serial interface.

7

SO

Serial-Data Output

8

DNC

Do Not Connect

CS

SCK

1

+

2

8

7

DNC

SO

T-

T+

GND

SO

TOP VIEW

3

4

6

5

MAX31855

MAX31855

ADC

DIGITAL

CONTROL

COLD-JUNCTION

COMPENSATION

FAULT

DETECTION

REFERENCE

VOLTAGE

S4

S1

S2

S3

S5

SCK

SO

CS

GND

T+

T-