Sensor

1.6 mm

0.33 mm

0.33 mm

0.165 mm

0.165 mm

1.6 mm

TMP006

Object

D

-

d

Sensor

TMP006, TMP006B

SBOS518E – MAY 2011 – REVISED APRIL 2015

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Feature Description (continued)

8.3.2 Field of View and Angular Response

The TMP006 and TMP006B sense all radiation within a defined field of view (FOV). The FOV (or full-angle of

θ)

is defined as 2

Φ. These devices contain no optical elements, and thus sense all radiation within the hemisphere

to the front of the device. Figure 3 shows the angular dependence of the sensor response and the relative power

for a circular object that subtends a half angle of phi (

Φ). Figure 7 defines the angle Φ in terms of object diameter

and distance. Figure 7 assumes that the object is well approximated as a plane that is perpendicular to the

sensor axis.

Figure 7. FOV Geometry Definition

In this case, the maximum contribution is from the portion of the object directly in front of the TMP006 or

TMP006B (

Φ = 0); with the sensitivity per solid angle, dR/dΦ decreases as Φ increases. Approximately 50% of

the energy sensed by the TMP006 and TMP006B is within a FOV (

θ) = 90°.

This discussion is for illustrative purposes only; in practice the angular response (dR/d

Φ) of the TMP006 and

TMP006B to the object is affected by the object orientation, the number of objects, and the precise placement

relative to the TMP006 or TMP006B. Figure 8 shows the thermopile sensor dimensions.

NOTE: Thermopile sensor is centered in the device.

Figure 8. Thermopile Sensor Dimensions

10

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