MAT01

Data Sheet

TYPICAL APPLICATIONS

Figure 13. Precision Reference

Figure 14. Basic Digital Thermometer Readout in Degrees Kelvin (K)

Figure 15. Digital Thermometer with Readout in °C

R1

1.5kΩ

1mA

VREF

VREF

≈ 7.0V

TCVREF

≈ 100ppm/°C

RO

≈ 40Ω

NOTES

1. R1 MAY BE ADJUSTED TO MINIMIZE TCVREF.

INCREASING R1 CAUSES A POSITIVE CHANGE IN TCVREF.

2.

hFE OF Q1 IS REDUCED BY OPERATION OF BREAKDOWN MODE.

Q1

Q2

SENSING PAIR

MAT01H

°C

K

EO

–55°C = 218K = 2.18V

+25°C = 298K = 2.98V

+125°C = 398K = 3.98V

DIFFERENTIAL

AMPLIFIER AND

CURRENT SOURCES

EO = 10mV/K

3-DIGIT DPM

0V TO +10V

FULL SCALE

UP TO

100 FEET

CABLE

+15V

–15V

SENSING PAIR

MAT01H

–55°C = –0.55V

+25°C = +0.25V

+125°C = +1.25V

DIFFERENTIAL

AMPLIFIER AND

CURRENT SOURCES

EO = 10mV/K

METER DISPLAYS

EO –2.73V

HIGH

2 1/2 DIGIT

DPM BIPOLAR

DIFFERENTIAL

INPUTS

LOW

UP TO

100FT.

CABLE

+15V

–15V

2.73V

POWER SUPPLY

+

–

Rev. D | Page 10 of 12