MLX90641ESF-BCB-000-TU datasheet, PDF

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MLX90641ESF-BCB-000-TU: DescriptionBoard mounted temperature sensor 16X12 thermal array sensor, 3Volt, 60deg total FOV; CategoryAnalog mixed-signal IC The signal circuit; File Size2MB，54 Pages; ManufacturerMelexis; Websitehttps://www.melexis.com/zh

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MLX90641ESF-BCB-000-TU Overview

Board mounted temperature sensor 16X12 thermal array sensor, 3Volt, 60deg total FOV

MLX90641ESF-BCB-000-TU Parametric

Parameter Name	Attribute value
Maker	Melexis
package instruction	TO-39, 4 PIN
Reach Compliance Code	compliant
Date Of Intro	2019-02-06
Samacsys Description	Board Mount Temperature Sensors 16X12 thermal array sensor, 3Volt, 60deg total FOV
Analog Integrated Circuits - Other Types	ANALOG CIRCUIT
JESD-30 code	R-XBCY-W4
Number of functions	1
Number of terminals	4
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	UNSPECIFIED
Package shape	RECTANGULAR
Package form	CYLINDRICAL
Maximum supply voltage (Vsup)	3.6 V
Minimum supply voltage (Vsup)	3 V
Nominal supply voltage (Vsup)	3.3 V
surface mount	NO
Temperature level	INDUSTRIAL
Terminal form	WIRE
Terminal location	BOTTOM

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MLX90641 16x12 IR array

Datasheet

1. Features and Benefits



Small size, low cost 16x12 pixels IR array

Easy to integrate

Industry standard four lead TO39 package

Factory calibrated

Noise Equivalent Temperature Difference

(NETD) 0.1K @4Hz refresh rate

C compatible digital interface

Programmable refresh rate 0.5Hz…64Hz

3.3V supply voltage

Current consumption ≈ 12mA

2 FOV options – 55°x35° and 110°x75°

Operating temperature -40°C ÷ 125°C

Target temperature -40°C ÷ 300°C

Complies with RoHS regulations

2. Application Examples



High precision non-contact temperature

measurements

Microwave ovens

Intrusion / Movement detection

Temperature sensing element for

residential, commercial and industrial

building air conditioning

Thermal Comfort sensor in automotive Air

Conditioning control system

Passenger classification

Industrial temperature control of moving

parts

Visual IR thermometers

Driver SW for MCU available at:

https://github.com/melexis/mlx90641-

library.git



3. Description

The MLX90641 is a fully calibrated 16x12 pixels

thermal IR array in an industry standard 4-lead

TO39 package with digital interface.

The MLX90641 contains 192 FIR pixels. An

ambient sensor is integrated to measure the

ambient temperature of the chip and supply

sensor to measure the VDD. The outputs of all

sensors IR, Ta and VDD are stored in internal RAM

and are accessible through I

Band gap

reference and

PTAT sensor

Vdd

Regulator for

digital part

34 MHz RC

oscillator

Vss

Array

M pixels

M amplifiers

M ADC

SDA

EEPROM

Storage RAM

I2C

SCL

Figure 1 Block diagram

MLX90641 16x12 IR array

Datasheet

Contents

1. Features and Benefits ............................................................................................................................ 1

2. Application Examples............................................................................................................................. 1

3. Description ............................................................................................................................................ 1

4. Ordering Information ............................................................................................................................ 5

5. Glossary of Terms .................................................................................................................................. 6

6. Pin Definitions and Descriptions ............................................................................................................ 7

7. Absolute Maximum Ratings ................................................................................................................... 7

8. General Electrical Specifications ............................................................................................................ 8

9. False pixel correction ............................................................................................................................. 9

10. Detailed General Description............................................................................................................... 9

10.1. Pixel position ..................................................................................................................................... 9

10.2. Communication protocol ............................................................................................................... 10

10.2.1. Low level ................................................................................................................................... 10

10.3. Measurement mode ....................................................................................................................... 11

10.4. Refresh rate..................................................................................................................................... 11

10.5. Measurement flow ......................................................................................................................... 12

10.6. Address map ................................................................................................................................... 14

10.6.1. Internal registers....................................................................................................................... 14

10.6.2. RAM ........................................................................................................................................... 16

EEPROM ................................................................................................................................................. 17

11. Calculating Object Temperature ........................................................................................................ 20

11.1. Restoring calibration data from EERPOM and calculations.......................................................... 20

11.1.1. Restoring the VDD sensor parameters and VDD calculations ................................................ 20

11.1.2. Restoring the Ta sensor parameters ....................................................................................... 21

11.1.3. Restoring the offset .................................................................................................................. 21

11.1.4. Restoring the Sensitivity

.................................................................................................. 22

11.1.5. Restoring the Kta(i,j) coefficient .............................................................................................. 23

11.1.6. Restoring the Kv(i,j) coefficient ................................................................................................ 23

11.1.7. Restoring the GAIN coefficient (common for all pixel) ........................................................... 24

11.1.8. Restoring the KsTa coefficient (common for all pixel) ............................................................ 24

11.1.9. Restoring corner temperatures (common for all pixel) .......................................................... 24

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MLX90641 16x12 IR array

Datasheet

11.1.10. Restoring the KsTo coefficient

(common for all pixel) .................................... 24

11.1.11. Restoring sensitivity correction coefficients for each temperature range ......................... 25

11.1.12. Restoring Emissivity ................................................................................................................ 25

11.1.13. Restoring the Sensitivity

............................................................................................... 26

11.1.14. Restoring the offset of the CP ................................................................................................ 26

11.1.15. Restoring the Kv CP coefficient .............................................................................................. 26

11.1.16. Restoring the Kta CP coefficient ............................................................................................ 26

11.1.17. Restoring the TGC coefficient ................................................................................................ 26

11.1.18. Restoring calibration resolution control settings ................................................................. 27

11.2. Temperature calculation ................................................................................................................ 27

11.2.1. Example input data ................................................................................................................... 27

11.2.2. Temperature calculation .......................................................................................................... 30

12. Performance graphs .......................................................................................................................... 41

12.1. Accuracy .......................................................................................................................................... 41

12.2. Startup time .................................................................................................................................... 43

12.2.1. First valid data........................................................................................................................... 43

12.2.2. Thermal behavior...................................................................................................................... 43

12.3. Noise performance and resolution ................................................................................................ 44

12.4. Field of view (FOV) .......................................................................................................................... 45

13. Application information ..................................................................................................................... 46

13.1. Electrical considerations ................................................................................................................ 46

13.2. Using the device in “image mode” ................................................................................................ 47

14. Application Comments ...................................................................................................................... 47

15. Mechanical drawings ......................................................................................................................... 49

15.1. FOV 55°............................................................................................................................................ 49

15.2. FOV 110° ......................................................................................................................................... 50

15.3. Device marking ............................................................................................................................... 51

16. Standard Information ........................................................................................................................ 52

17. ESD Precautions................................................................................................................................. 52

18. Revision History Table ....................................................................................................................... 52

19. Contact .............................................................................................................................................. 53

20. Disclaimer .......................................................................................................................................... 53

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MLX90641 16x12 IR array

Datasheet

Tables

Table 1 Ordering information .......................................................................................................................................................... 5

Table 2 Glosarry of terms ................................................................................................................................................................ 6

Table 3 Pin definition ...................................................................................................................................................................... 7

Table 4 Absolute maximum ratings ................................................................................................................................................. 7

Table 5 Electrical specification ........................................................................................................................................................ 8

Table 6 Priorities of subpage controls ............................................................................................................................................15

Table 7 Configuration parameters memory ....................................................................................................................................17

Table 8 EEPROM overview (words) .................................................................................................................................................18

Table 9 Calibration parameters memory (EEPROM - bits) ...............................................................................................................19

Table 10 Calculation example input data ........................................................................................................................................27

Table 11 Calculation example calibration data ................................................................................................................................29

Table 12 Noise performance ..........................................................................................................................................................45

Table 13 Available FOV options ......................................................................................................................................................46

Table 14 Revision history ...............................................................................................................................................................52

Figures

Figure 1 Block diagram ................................................................................................................................................................... 1

Figure 2 MLX90641 Overview and pin description ........................................................................................................................... 7

Figure 3 Pixel in the whole FOV ....................................................................................................................................................... 9

Figure 4 I C write command format (default SA=0x33 is used) ........................................................................................................10

Figure 5 I C read command format (default SA=0x33 is used) .........................................................................................................10

Figure 6 Refresh rate timing ...........................................................................................................................................................11

Figure 7 Recommended measurement flow ...................................................................................................................................12

Figure 8 TV mode reading pattern ..................................................................................................................................................13

Figure 9 MXL90641 memory map ...................................................................................................................................................14

Figure 10 Status register (0x8000) bits meaning .............................................................................................................................14

Figure 11 Control register 1 (0x800D) bits meaning ........................................................................................................................15

Figure 12 I C configuration register (0x800F) bits meaning .............................................................................................................16

Figure 13 RAM memory map (Interleaved mode - default) ..............................................................................................................16

Figure 14 EEPROM to registers mapping .........................................................................................................................................17

Figure 15 EEPROM Hamming and data bit meaning ........................................................................................................................20

Figure 16 To calculation flow .........................................................................................................................................................30

Figure 17 Temperature absolute accuracy - MLX90641BCA .............................................................................................................41

Figure 18 Temperature absolute accuracy - MLX90641BCB .............................................................................................................42

Figure 19 Different accuracy zones depending on device type (BCA on the left and BCB on the right) ..............................................42

Figure 20 MLX90641BCx noise vs refresh rate for different device types .........................................................................................44

Figure 21 MLX90641BCA noise vs pixel and refresh rate at 1Hz and 2Hz .........................................................................................44

Figure 22 MLX90641BCA noise vs pixel and refresh rate at 4Hz, 8Hz and 16Hz ................................................................................44

Figure 23 MLX90641BCB noise vs pixel and refresh rate at 1Hz and 2Hz..........................................................................................45

Figure 24 MLX90641BCB noise vs pixel and refresh rate at 4Hz, 8Hz and 16Hz ................................................................................45

Figure 25 Field Of View measurement ............................................................................................................................................45

Figure 26 MLX90641Bxx electrical connections...............................................................................................................................46

Figure 27 Calculation flow in thermal image mode .........................................................................................................................47

Figure 28 Mechanical drawing of 55° FOV device ............................................................................................................................49

Figure 29 Mechanical drawing of 110° FOV device ..........................................................................................................................50

REVISION 1 – NOVEMBER 16, 2018

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MLX90641ESF-BCB-000-TU Related Products

	MLX90641ESF-BCB-000-TU	MLX90641ESF-BCB-000-SP	MLX90641ESF-BCA-000-SP	MLX90641KSF-BCB-000-SP	MLX90641ESF-BCA-000-TU	MLX90641KSF-BCB-000-TU	MLX90641KSF-BCA-000-TU	MLX90641KSF-BCA-000-SP
Description	Board mounted temperature sensor 16X12 thermal array sensor, 3Volt, 60deg total FOV	Board mounted temperature sensor 16X12 thermal array sensor, 3Volt, 60deg total FOV	Board mounted temperature sensor 16X12 thermal array sensor, 3Volt, 120deg total FOV	Board mounted temperature sensor 16X12 thermal array sensor, 3Volt, 60deg total FOV, 125C	Board mounted temperature sensor 16X12 thermal array sensor, 3Volt, 120deg total FOV	Board mounted temperature sensor 16X12 thermal array sensor, 3Volt, 60deg total FOV, 125C	Board mounted temperature sensor 16X12 thermal array sensor, 3Volt, 120deg total FOV, 125C	Board mounted temperature sensor 16X12 thermal array sensor, 3Volt, 120deg total FOV, 125C
Maker	Melexis	Melexis	Melexis	Melexis	Melexis	Melexis	Melexis	Melexis
Maximum operating temperature	85 °C	+ 85 C	+ 85 C	+ 125 C	+ 85 C	+ 125 C	+ 125 C	+ 125 C
Minimum operating temperature	-40 °C	- 40 C	- 40 C	- 40 C	- 40 C	- 40 C	- 40 C	- 40 C
Product Category	-	Board mounted temperature sensor	Board mounted temperature sensor	Board mounted temperature sensor	Board mounted temperature sensor	Board mounted temperature sensor	Board mounted temperature sensor	Board mounted temperature sensor
Supply voltage - min.	-	3 V	3 V	3 V	3 V	3 V	3 V	3 V
Supply voltage - max.	-	3.6 V	3.6 V	3.6 V	3.6 V	3.6 V	3.6 V	3.6 V
Interface Type	-	I2C	I2C	I2C	I2C	I2C	I2C	I2C
closure	-	No Shutdown	No Shutdown	No Shutdown	No Shutdown	No Shutdown	No Shutdown	No Shutdown
Installation style	-	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package/box	-	TO-39-4	TO-39-4	TO-39-4	TO-39-4	TO-39-4	TO-39-4	TO-39-4
product	-	Temperature Sensors	Temperature Sensors	Temperature Sensors	Temperature Sensors	Temperature Sensors	Temperature Sensors	Temperature Sensors
Encapsulation	-	Bulk	Bulk	Bulk	Tube	Tube	Tube	Bulk
Working power current	-	12 mA	12 mA	12 mA	12 mA	12 mA	12 mA	12 mA
Factory packaging quantity	-	20	20	20	1035	1035	1035	20

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