TMP006, TMP006B

www.ti.com

SBOS518E – MAY 2011 – REVISED APRIL 2015

8.3.5 Calibration

The TMP006 and TMP006B default coefficients are calibrated with a black body of emissivity,

ε = 0.95, and an

FOV (

θ) = 110°. Use these coefficients for applications where the object emissivity and geometry satisfy these

conditions. For applications with different object emissivity or geometry, calibrate the TMP006 or TMP006B to

accurately reflect the object temperature and system geometry. Accuracy is affected by device-to-device or

object-to-object variation. For the most demanding applications, calibrate each device individually.

As an overview the calibration procedure includes:

1. Defining the environmental variation range (die and object temperature range, supply voltage, temperature

change speed, sampling rate and so on).

2. Making the die temperature measurements and IR sensor voltage measurements over the environmental

range.

3. Generate an optimal set of coefficients based on the collected data set.

The best temperature precision is available if every device is calibrated individually. Alternatively, if all the units in

the application use the same coefficients, then calibrate a statistically significant number of devices.

Recalibration may be required under any or all of the following conditions:

1. Board layout is changed.

2. Object or objects in the field of view changed.

3. Object distance changed.

4. Angle between device surface and direction to the object changed.

5. Object and local temperature range changed outside the environmental calibration range.

6. Object and local temperature transients significantly changed.

7. Supply voltage changed more than 1 V.

8. Air convection or conduction near the device.

For further information and methods for calibration, refer to user guide SBOU142, TMP007 Calibration Guide

Copyright © 2011–2015, Texas Instruments Incorporated

Submit Documentation Feedback

13

Product Folder Links: TMP006 TMP006B