Data Sheet

MLX90640 32x24 IR array
Datasheet
Page 47 of 60
REVISION 11 – 3 AUGUST 2018
12. Performance graphs
12.1.
12.1.12.1.
12.1. Accuracy
AccuracyAccuracy
Accuracy
All accuracy specifications apply under settled isothermal conditions only.
Furthermore, the accuracy is only valid if the object fills the FOV of the sensor completely.
Parameter definitions:
Frame accuracy is defined as average value of the all (768) pixels in the frame or for frame• can be expressed as:
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Non-uniformity is defined as the maximum deviation of each individual pixel reading vs. the absolute accuracy.
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Pixel absolute accuracy is defined as:
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Figure 17 Absolute temperature accuracy – MLX90640BAA (left) and MLX90640BAB (right)
Example: If we assume that the sensor (BAA type, zone 1) is measuring a target at 80°C that would mean that there should be
no pixel with error bigger than:
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NOTE: For best performance it is recommended to keep the supply voltage as accurate and stable as possible to 3.3V ± 0.1V
TBD
Frame Accuracy ± 1°C
Uniformity zone1 ± 1°C
Uniformity zone2 ± 2°C
Contact MLXContact MLX
Frame accuracy ± 1°C
Non-uniformity zone1 ± 0.5°C
Non-uniformity zone2 ± 1°C
Non-uniformity zone3 ± 2°C ± 2%*|To-Ta|
Frame Accuracy ± 2°C
NU zone1±1°C± 2%*|To-Ta|
NU zone2±2°C± 2%*|To-Ta|
NU zone3±3°C± 2%*|To-Ta|
Contact MLX
Frame accuracy ± 2°C
NU zone1±1°C± 2%*|To-Ta|
NU zone2±2°C± 2%*|To-Ta|
NU zone3±3°C± 2%*|To-Ta|
TBDTBD
TBD
Frame Accuracy ± 5°C
Non-uniformity ± 2%*|To-Ta|
To, °C
-40°C
0°C
50°C
-40°C
0°C
100°C
Ta, °C
200°C
300°C
85°C
400°C
TBDTBD
TBD
TBD
TBD
TBDTBD
To, °C
-40°C
0°C
50°C
-40°C
0°C
100°C
200°C
300°C
85°C
400°C
Ta, °C