ADS1113 datasheet(28/43 Pages) TI2

28 / 43 page

Thermocouple Voltage (mV)

-10

-0.15

-0.1

-0.05

0.05

0.1

0.15

Temperature (qC)

-200

200

400

600

800

1000

1200

1400

-4

-3

-2

-1

Thermocouple

Voltage

On-chip

Temperature

T Æ V

V Æ T

Result

Device

MCU

VTC

TCJ

VCJ

VActual

TActual

ADS1018

SBAS526D – NOVEMBER 2012 – REVISED SEPTEMBER 2019

www.ti.com

Product Folder Links: ADS1018

Submit Documentation Feedback

Figure 24. Software-Flow Block Diagram

Figure 25 and Figure 26 show the expected measurement results. A system offset calibration is performed at TTC

= 25°C that equates to VTC = 0 V when TCJ = 25°C. The dashed blue lines in Figure 25 show the maximum error

guard band due to ADC gain and nonlinearity error. The dashed blue lines in Figure 26 show the corresponding

temperature measurement error guard band calculated from the data in Figure 25 using the NIST tables. The

dashed red lines in Figure 26 include the guard band for the temperature sensor inaccuracy (±1°C), in addition to

the device gain and nonlinearity error. Note that the results in Figure 25 and Figure 26 do not account for the

thermocouple inaccuracy that must also be considered while designing a thermocouple measurement system.

9.2.3 Application Curves

Figure 25. Voltage Measurement Error vs VTC

Figure 26. Temperature Measurement Error vs TTC

ADS1113 Datasheet(PDF) 28 Page - Texas Instruments

ADS1113 Datasheet(HTML) 28 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43

Datasheet Download

Link URL