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PDF MLX90620 Data sheet ( Hoja de datos )
| Número de pieza | MLX90620 | |
| Descripción | 16x4 IR array | |
| Fabricantes | Melexis | |
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MLX90620
16x4 IR array
Features and Benefits
Small size, low cost 16x4 pixels IR array
Easy to integrate
Industry standard four lead TO-39 package
Factory calibrated infrared temperature
measurement.
Calibration parameters stored in EEPROM.
NETD (Noise Equivalent Temperature
Difference) <0.25K RMS@4Hz refresh rate
I2C compatible digital interface
Programmable frame rate 0.5Hz…64Hz
2.6V supply voltage
Current consumption less than 9mA
Measurement start trigger for synchronization
with external control unit
2 FOV options
Ta -40 to 85ºC
To -50 to 300ºC
Complies with RoHS regulations
Applications Examples
High precision non-contact temperature
measurements;
Temperature sensing element for residential,
commercial and industrial building air
conditioning;
Microwave ovens
Home appliances with temperature control;
Thermal Comfort sensor in automotive Air
Conditioning control system;
Passenger classification
Automotive blind spot detection;
Industrial temperature control of moving parts;
Identifying thermal leaks in homes
Thermal scanners
Security / safety gates
Intrusion / Movement detection and Imaging
Ordering Information
Part No.
MLX90620
Temperature
Code
E (-40°C to 85°C)
Package
Code
SF (TO-39)
Option Code
XXX
(1) (2) (3)
Packing Form
Tube
(1) Supply Voltage
B = 3V
(2) Number of thermopiles:
A = 16X4
Example:
MLX90620ESF-BAB-000-TU
(3) Package options:
A = reserved
B = 60° FOV
C = reserved
D = 40° FOV
Functional diagram
General Description
Digital Active Thermopile Array
Digital filtering
RAM memory
EEPROM
I2C interface
CLK SDA
VDD
VSS
The MLX90620 is a fully calibrated 16x4 pixels IR
array in an industry standard 4-lead TO-39
package. It contains 2 chips in one package: the
IR array with signal conditioning electronics) and
the 24AA02 (256x8 EEPROM) chip.
The MLX90620 contains 64 IR pixels with
dedicated low noise chopper stabilized amplifier
and fast, integrated ADC. A PTAT (Proportional
To Absolute Temperature) sensor is integrated to
measure the ambient temperature of the chip. The
outputs of both IR and PTAT sensors are stored in
internal RAM and are accessible through I2C.
3001090620
Rev 2.0
Page 1 of 39
Datasheet IR16x4
March 20, 2012
1 page  
MLX90620
16x4 IR array
2 Glossary of terms
POR
PTAT
IR
IR_data
ADC
Ta
To
TGC
FOV
ESD
EMC
I2C
SDA
SCL
DSP
HFO
FpS
MD
SD
TBD
NA
Power On Reset
Proportional To Absolute Temperature sensor (package temperature)
Infra Red
Infrared data (raw data from ADC proportional to IR energy received by the sensor)
Analog To Digital Converter
Ambient Temperature measured from the chip – (the package temperature)
Object Temperature, ‘seen’ from IR sensor
Temperature Gradient Coefficient
Field Of View
Electro-Static Discharge
Electro-Magnetic Compatibility
Inter-Integrated Circuit communication protocol
Serial Data
Serial Clock
Digital Signal Processing
High Frequency Oscillator (RC type)
Frames per Second – data refresh rate
Master Device
Slave Device
To Be Defined
Not Applicable
Table 1 Glossary of terms
3 Absolute Maximum ratings
Parameter
Supply Voltage, VDD (over voltage)
Supply Voltage, VDD (operating max)
Reverse Voltage (each pin)
Operating Temperature Range, TA
Storage Temperature Range, TS
ESD Sensitivity (AEC Q100 002)
DC sink current, SDA
DC source current, SDA
DC clamp current, SDA
DC source current, SCL
DC clamp current, SCL
MLX90620
5V
3.6V
-0.3 V
-40…+85°C
-40…+125°C
2kV
25 mA
NA
NA
NA (input only)
NA
Table 2 Absolute maximum ratings for MLX90620
Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-maximum-
rated conditions for extended periods may affect device reliability.
3001090620
Rev 2.0
Page 5 of 39
Datasheet IR16x4
March 20, 2012
5 Page 
MLX90620
16x4 IR array
7.1.1 Reading configuration
7.1.1.1 Reading configuration register
Slave address
Command
Start address
Address step
Number of reads
Slave address
SDA
S1 1 0 0 0 0 0 W A 0 0 0 0 0 0 1 0 A 1 0 0 1 0 0 1 0 A 0 0 0 0 0 0 0 0 A 0 0 0 0 0 0 0 1 A S1 1 0 0 0 0 0 R A
Configuration value
LSByte
A
Configuration value
MSByte
AP
SCL
Figure 7 Reading configuration register (SA = 0x60, command = 0x02,
Start address = 0x92, Address step = 0x00, Number of reads = 0x01)
7.1.1.2 Reading oscillator trimming register
Slave address
Command
Start address
Address step
Number of reads
Slave address
SDA
S1 1 0 0 0 0 0 W A 0 0 0 0 0 0 1 0 A 1 0 0 1 0 0 1 1 A 0 0 0 0 0 0 0 0 A 0 0 0 0 0 0 0 1 A S1 1 0 0 0 0 0 R A
Oscillator trim value
LSByte
A
Oscillator trim value
MSByte
AP
SCL
Figure 8 Reading configuration register (SA = 0x60, command = 0x02,
Start address = 0x93, Address step = 0x00, Number of reads = 0x01)
7.2 Measuring
After the initialization procedure is done depending on the selected measurement mode (bit 6 in the
configuration register) there are two possible routines:
- continuous mode
- wait for valid data (depending on chosen refresh rates – IR and PTAT)
- Step mode
- Send start measurement command
Slave address
Command
SDA
S1 1 0 0 0 0 0 WA 0 0 0 0 0 0 0 1 A 0 0 0 0 1 0 0 0 A P
SCL
Figure 9 Start measurement command (SA = 0x60, command = 0x0801)
- Wait until measurement is finished. Detecting a measurement finish can be
achieved by:
Wait for t = 1 or t = 1 whichever is bigger from the moment of
FpSTO
FpSTA
starting the measurement (write to the configuration I/O)
By polling the appropriate flags in the configuration IO at 0x92, bits 8 and 9.
(See8.2.2)
A combination of both.
3001090620
Rev 2.0
Page 11 of 39
Datasheet IR16x4
March 20, 2012
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MLX90620.PDF ] | |
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