MLX90614ESF-BCA Melexis Inc, MLX90614ESF-BCA Datasheet - Page 20

THERMOMETER IR DUAL 3V TO-39

MLX90614ESF-BCA

Manufacturer Part Number
MLX90614ESF-BCA
Description
THERMOMETER IR DUAL 3V TO-39
Manufacturer
Melexis Inc
Datasheet

Specifications of MLX90614ESF-BCA

Function
Thermometer, Thermostat
Topology
ADC (Sigma Delta), Voltage Regulator
Sensor Type
Internal
Sensing Temperature
-40°C ~ 85°C
Output Type
PWM, SMBus™
Output Alarm
No
Output Fan
No
Voltage - Supply
2.4 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Through Hole
Package / Case
TO-39
For Use With
EVB90614 - BOARD EVAL FOR MLX90614
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MLX90614ESF-BCA
Manufacturer:
Melexis Inc
Quantity:
135
MLX90614 family
Single and Dual Zone
Infra Red Thermometer in TO-39
EEPROM. Details on embedded filtering are available in application note “Understanding MLX90614 on-chip
digital signal filters”, available from
www.melexis.com
SCL line is kept low in order to reduce current leakage trough the pin (artificial Zener diode is connected to
that pin).
8.4.8 MLX90614 SMBus specific remarks
The auxiliary functions of the SCL pin (zener diode) add undershoot to the clock pulse (5V devices only) as
shown in the picture below (see Fig 9). This undershoot is caused by the transient response of the on-chip
synthesized Zener diode. Typical duration of undershoot is approximately 15µs. An increased reactance of
the SCL line is likely to increase this effect. Undershoot does not affect the recognition of the SCL rising edge
by the MLX90914, but may affect proper operation of non-MLX90614 slaves on the same bus.
Figure 12: Undershoot of SCL line due to on chip synthesized Zener diode (5V versions only)
Continuous SMBus readings can introduce and error. As the SCL line inside TO39 package is passing
relatively close to the sensor input and error signal is induced to the sensor output. The manifestation of the
problem is wrong temperature readings. This is especially valid for narrow FOV devices. Possible solution is
to keep SDA and SCL line quite for period longer than refresh rate and settling time defined by internal
settings of MLX90614 prior reading the temperature or switch to PWM signal and completely disconnect from
SDA and SCL line.
3901090614
Page 20 of 49
Data Sheet
Rev 006
September 30, 2010

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