MLX90621

16x4 IR array

Datasheet

39001090621

Page 35 of 44

Datasheet IR16x4

Rev 3.0

15 September 2016

Noise performance and resolution

10.2.

There are two bits in the configuration register that allow changing the resolution of the MLX90621 measurements.

Increasing the resolution decreases the quantization noise and improves the overall noise performance.

Measurement conditions for the noise are: To=Ta=25°C

NOTE: It is normal that the noise will decrease for high temperature and increase for lower temperatures

Figure 27: Central pixels noise

Figure 28: Corner pixels noise

0.00

0.50

1.00

1.50

2.00

2.50

3.00

0.5

1

2

4

8

16

32

64

128

256

512

Refresh rate, Hz

Central pixels RMS noise at different refresh rates and

maximum resolution (Configuration register[5:4] = 11b)

MLX90621BAA (120°X25°)

MLX90621BAB (60°X15°)

MLX90621BAD (40°X10°)

0.00

1.00

2.00

3.00

4.00

5.00

6.00

0.5

1

2

4

8

16

32

64

128

256

512

Refresh rate, Hz

Corner pixels RMS noise at different refresh rates and

maximum resolution (Configuration register[5:4] =

11b)

MLX90621BAA (120°X25°)

MLX90621BAB (60°X15°)

MLX90621BAD (40°X10°)