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TMP007

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SBOS685C – APRIL 2014 – REVISED JULY 2015

Typical Applications (continued)

8.2.1.1 Design Requirements

For this application, the system must operate over the environment described in Table 10.

Table 10. Wide-Range Parameters

DESIGN PARAMETER

EXAMPLE VALUE

COMMENT

Number of devices in calibration set

Minimum TDIE

0°C

Minimum expected die temperature

Maximum TDIE

60°C

Maximum expected die temperature

Minimum TOBJ

0°C

Minimum expected objected temperature

Maximum TOBJ

60°C

Maximum expected object temperature

0.95

Object emissivity

Field of view

110°

Field of view subtended by object

Conversion rate

1 sample/second

Select a set of values for TDIE and TOBJ to generate the calibration set. At a minimum, include the four extreme

points of the temperature ranges desired. In practice, it is best to include a number of intermediate points as well.

This example uses the values shown in Table 11, with an X marking the values chosen for measurement.

Table 11. Wide-Range Measurement Values

TDIE

TOBJ

0°C

20°C

40°C

60°C

0°C

20°C

40°C

60°C

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