MLX90614

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Manufacturer

unknown

Overview

Part: MLX90614 from Melexis

Type: IR sensor

Key Specs:

Sensor temperature range: -40°C to +125°C
Object temperature range: -70°C to +380°C
Accuracy: 0.5°C (in 0°C to +50°C for both Ta and To)
Measurement resolution: 0.02°C
Current consumption: ≈ 1.4mA
Supply voltage: 3.0V and 5.0V (adaptable for 8V to 16V)
PWM output resolution: 0.14°C (for -20°C to 120°C range)

Features:

Small size, low cost
Easy to integrate
Industry standard four lead TO39 package
Factory calibrated (reports temperature)
High (medical) accuracy version
SMBus compatible digital interface
Customizable PWM output for continuous reading
Single or dual zone version
Sleep mode for reduced power consumption
Automotive grade

Applications:

High precision non-contact temperature measurements
Microwave ovens
Thermal Comfort sensor for Mobile Air Conditioning control system
Intrusion / Movement detection
Temperature sensing element for residential, commercial and industrial building air conditioning
Windshield defogging
Automotive blind angle detection
Industrial temperature control of moving parts
Temperature control in printers and copiers
Home appliance with temperature control
Healthcare
Livestock monitor
Movement detector
Thermal relay / alert
Body temperature measurement

Package:

TO39 package

Features

Small size, low cost IR sensor
Easy to integrate
Industry standard four lead TO39 package
Factory calibrated (reports temperature) in wide temperature range:
- -40°C…+125°C for sensor temperature
- -70°C…+380°C for object temperature
High accuracy of 0.5°C in wide temperature range – 0°C…+50°C for both Ta and To
High (medical) accuracy version
Measurement resolution of 0.02°C
SMBus compatible digital interface
Customizable PWM output for continuous reading
Single or dual zone version
Available in 3.0V and 5.0V supply voltage
Current consumption ≈ 1.4mA
Simple adaptation for 8V…16V application
Sleep mode for reduced power consumption
Operating temperature -40°C…+125°C
Target temperature -70°C…+380°C
Automotive grade

Applications

High precision non-contact temperature measurements
Microwave ovens
Thermal Comfort sensor for Mobile Air Conditioning control system
Intrusion / Movement detection
Temperature sensing element for residential, commercial and industrial building air conditioning
Windshield defogging
Automotive blind angle detection
Industrial temperature control of moving parts
Temperature control in printers and copiers
Home appliance with temperature control
Healthcare
Livestock monitor
Movement detector
Thermal relay / alert
Body temperature measurement

Absolute Maximum Ratings

(TA=25°C, unless otherwise specified)

Parameter	Symbol	Min.	Max.	Unit	Condition
Supply voltage – Axx type	VDD		7	V	< 24 hours
Supply voltage – Bxx type	VDD		5	V	< 24 hours
SDA output (sink) current	I_SDA_SINK		100	mA	< 24 hours
Reverse voltage (each pin)	VREVERSE		-0.4	V	< 24 hours
ESD voltage	VESD-HBM		± 2	kV	HBM (AEC-Q100-002), all pins
Storage temperature	TSTG	-40	125	°C
Operating temperature – ESF type	TO	-40	85	°C	Ambient temperature
Operating temperature – KSF type	TO	-40	125	°C	Ambient temperature

Table 3 – Absolute Maximum Ratings

Exceeding the absolute maximum ratings may cause permanent damage.

Exposure to absolute maximum-rated conditions for extended periods may affect the device reliability.

Single and dual zone IR sensor in TO39 Datasheet

3.2 Electrical operating conditions & specifications

3.2.1 MLX90614Axx

Unless otherwise specified, the electrical specifications are valid for a T^A = 25°C, and a supply voltage = 5.0V

Parameter	Symbol	Min.	Typ.	Max.	Unit	Condition
Supply voltage	VDD	4.5	5.0	5.5	V	± 50mV
Supply voltage rising	VDD-rising	0		20	ms	Ensure POR

Table 4 – Electrical operating conditions

Parameter	Symbol	Min.	Typ.	Max.	Unit	Condition
Supply Current	IDD		1.3	2.5	mA
Zener voltage	VZ	5.5	5.7	5.9	V	IZ = 75…1000µA, Ta= room
Zener voltage	VZ (TA)	5.15	5.7	6.24	V	IZ = 75…1000µA, all Ta
POR level up	VPOR_UP	1.4	1.75	1.95	V	VDD raising (all Ta)
POR level down	VPOR_DOWN	1.3	1.7	1.9	V	VDD falling (all Ta)
POR hysteresis	VPOR_HYS	0.08	0.1	1.15	V	all Ta
Input high voltage (SDA, SCL)	VIN_H	3			V	over Ta and VDD
Input low voltage (SDA, SCL)	VIN_L			0.6	V	over Ta and VDD
Output high voltage	VOUT_H	VDD – 0.2			V	ISOURCE = 2mA
Output low voltage	VOUT_L			VSS + 0.2	V	ISINK = 2mA
Output drive current	IDRIVE		7		mA	VOUT_H = VDD – 0.8V
Output sink current	ISINK		13.5		mA	VOUT_L = 0.8V
SDA output low voltage	VOL			0.2	V	ISINK=2mA (over Ta and VDD)
SCL leakage	ISCL_LEAK			30	µA	VSCL=4.0V, Ta=85°C (zener)
SDA leakage	ISDA_LEAK			0.4	µA	VSDA=5.0V, Ta=85°C
SDA capacitance	CSDA			10	pF
SCL capacitance	CSCL			10	pF
SMBus clock frequency	FSMBus	10		100	kHz
To output resolution	TO_RES		0.02		°C	SMBus mode
To output resolution	TO_RES	0.44		0.02	°C	PWM mode
PWM resolution	PWMRES		10		bit
PWM output period	PWM T_DEF		1.024		ms	RC oscillator dependent
PWM period stability	dPWMT	-10		+10	%	(over Ta and VDD)
Output valid (results in RAM)	Tvalid		250		ms	After POR
Slave address	SA		5A			hex
Wake up request	tWAKE	33			ms	SDA low
SMBus request	tREQ	1.44			ms	SCL low
Timeout, low	TTIMEOUT_L	27		33	ms	SCL low
Timeout, high	TTIMEOUT_H	45		55	µs	SCL high
Acknowledge setup time	TSUAC (MD)			1.5	µs	8-th SCL falling edge, Master
Acknowledge hold time	THDAC (MD)			1.5	µs	9-th SCL falling edge, Master
Acknowledge setup time	TSUAC (SD)			2.5	µs	8-th SCL falling edge, Slave
Acknowledge hold time	THDAC (SD)			1.5	µs	9-th SCL falling edge, Slave
EEPROM data retention		10			Years	Ta=85°C
EEPROM write / erase cycles		100,000			cycles	Ta=25°C
EEPROM write / erase cycles		10,00			cycles	Ta=125°C
Erase cell time (EEPROM)	TERASE		5		ms
Write cell time (EEPROM)	TWRITE		5		ms
Table 5 – Electrical specifications Axx version

Single and dual zone IR sensor in TO39 Datasheet

3.2.2 MLX90614Bxx and MLX90614Dxx

Unless otherwise specified, the electrical specifications are valid for a T^A = 25°C, and a supply voltage = 3.0V

Parameter	Symbol	Min.	Typ.	Max.	Unit	Condition
Supply voltage	VDD	2.6	3.0	3.6	V	± 50mV
Supply voltage rising	VDD-rising	0		20	ms	Ensure POR

Table 6 – Electrical operating conditions

Parameter	Symbol	Min.	Typ.	Max.	Unit	Condition
Supply Current	IDD		1.3	2.5	mA
Sleep current	ISLEEP		2	6	µA	over Ta and VDD
POR level up	VPOR_UP	1.4	1.75	1.95	V	VDD raising (all Ta)
POR level down	VPOR_DOWN	1.3	1.7	1.9	V	VDD falling (all Ta)
POR hysteresis	VPOR_HYS	0.08	0.1	1.15	V	all Ta
Input high voltage (SDA, SCL)	VIN_H	VDD – 0.1			V	over Ta and VDD
Input low voltage (SDA, SCL)	VIN_L			0.6	V	over Ta and VDD
Output high voltage	VOUT_H	VDD – 0.25			V	ISOURCE = 2mA
Output low voltage	VOUT_L			VSS + 0.25	V	ISINK = 2mA
Output drive current	IDRIVE		4.5		mA	VOUT_H = VDD – 0.8V
Output sink current	ISINK		11		mA	VOUT_L = 0.8V
SDA output low voltage	VOL			0.2	V	ISINK=2mA (over Ta and VDD)
SCL leakage	ISCL_LEAK			20	µA	VSCL=3.0V, Ta=85°C
SDA leakage	ISDA_LEAK			0.25	µA	VSDA=3.0V, Ta=85°C
SDA capacitance	CSDA			10	pF
SCL capacitance	CSCL			10	pF
SMBus clock frequency	FSMBus	10		100	kHz
To output resolution	TO_RES		0.02		°C	SMBus mode
To output resolution	TO_RES	0.44		0.02	°C	PWM mode
PWM resolution	PWMRES		10		bit
PWM output period	PWM T_DEF		1.024		ms	RC oscillator dependent
PWM period stability	dPWMT	-10		+10	%	(over Ta and VDD)
Output valid (results in RAM)	Tvalid		250		ms	After POR
Slave address	SA		5A			hex
Wake up request	tWAKE	33			ms	SDA low
SMBus request	tREQ	1.44			ms	SCL low
Timeout, low	TTIMEOUT_L	27		33	ms	SCL low
Timeout, high	TTIMEOUT_H	45		55	µs	SCL high
Acknowledge setup time	TSUAC (MD)			1.5	µs	8-th SCL falling edge, Master
Acknowledge hold time	THDAC (MD)			1.5	µs	9-th SCL falling edge, Master
Acknowledge setup time	TSUAC (SD)			2.5	µs	8-th SCL falling edge, Slave
Acknowledge hold time	THDAC (SD)			1.5	µs	9-th SCL falling edge, Slave
EEPROM data retention		10			Years	Ta=85°C
EEPROM write / erase cycles		100,000			cycles	Ta=25°C
EEPROM write / erase cycles		10,00			cycles	Ta=125°C
Erase cell time (EEPROM)	TERASE		5		ms
Write cell time (EEPROM)	TWRITE		5		ms
Table 7 – Electrical specification – Bxx and Dxx versions

NOTE 1: All the communication and refresh rate timings are given for the nominal calibrated HFO frequency and will vary with this frequency's variations.

NOTE 2: With large capacitive load lower PWM frequency is recommended. Thermal relay output (when configured) has the PWM DC specification and can be programmed as push-pull, or NMOS open drain. PWM

Single and dual zone IR sensor in TO39 Datasheet

is free-running, power-up factory default is SMBus, refer to section 4.1.6, "Switching between PWM and SMBus communication" for more details.

NOTE 3: For SMBus compatible interface on 12V application refer to Application information section. SMBus compatible interface is described in details in the SMBus detailed description section. Maximum number of MLX90614 devices on one bus is 127, higher pull-up currents are recommended for higher number of devices, faster bus data transfer rates, and increased reactive loading of the bus.

NOTE 4: MLX90614 is always a slave device on the bus. MLX90614 can work in both low-power and highpower SMBus communication.

NOTE 5: All voltages are referred to the Vss (ground) unless otherwise noted.

NOTE 6: Sleep mode is not available on the 5V version (MLX90614Axx).

Single and dual zone IR sensor in TO39 Datasheet

Thermal Information

The MLX90614 can be configured as a thermo relay with programmable threshold and hysteresis on the PWM/SDA pin. The input for the comparator unit of the relay is the object temperature from sensor 1

The output of the MLX90614 is NOT a relay driver but a logical output which should be connected to a relay driver if necessary.

The output driver is one and the same for PWM and Thermal relay.

In order to configure the MLX90614 to work as thermal relay two conditions must be met:

o Set bit TRPWMB high at address 0x02 in EEPROM
o Enable PWM output i.e. EN_PWM is set high

The PWM / SDA pin can be programmed as a push-pull or open drain NMOS (via bit PPODB in EEPROM PWMCTRL), which can trigger an external device. The temperature threshold data is determined by EEPROM at address 0x21 (Tomin) and the hysteresis at address 0x020 (Tomax).

The logical state of the PWM/SDA pin is as follows:

PWM / SDA pin is high if 1 ≥ ℎℎ + ℎ

PWM / SDA pin is low if 1 ≤ ℎℎ − ℎ

Figure 19 – Thermal relay: PWM (SDA) pin versus Tobj

The MLX90614 preserves its normal operation when configured as a thermal relay (PWM configuration and specification applies as a general rule also for the thermal relay) and therefore it can be read using the SMBus (entering the SMBus mode from both PWM and thermal relay mode is the same).

For example, the MLX90614 can generate a wake-up alert for a system upon reaching a certain temperature and then be read as a thermometer. Reset conditions (enter and exit Sleep, for example) will be needed in order to return to the thermal relay mode.

Single and dual zone IR sensor in TO39 Datasheet

Example:

$$Threshold = 5^{\circ}C \rightarrow EEPROM[0x01] = 100 * (Threshold + 273.15) = 27815 = 0x6CA7$$

$$Hysteresis = 1^{\circ}C \rightarrow EEPROM[0x00] = 100 * Hysteresis = 100 = 0x0064$$

Smallest possible hysteresis is 0,01°C or (EEPROM, 0x00 = 0x0001)

PWM / SDA pin will be set low at object temperature below 4°C PWM / SDA pin will be set high at object temperature higher that 6°C

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