EVB90614 Melexis Inc, EVB90614 Datasheet - Page 9

• Manufacturer Part Number: EVB90614
• Description: BOARD EVAL FOR MLX90614
• Manufacturer: Melexis Inc

Specifications of EVB90614

• Sensor Type: Temperature
• Sensing Range: -40°C ~ 125°C
• Interface: SMBus (2-Wire/I²C)
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: MLX90614
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Sensitivity: -

USER MANUAL
MLX90614 Evaluation board
From this window the user can configure the MLX90614 module. A short description
of every setting field follows bellow. For a detailed description of the settings please refer to
the MLX90614 datasheet. These settings are stored in MLX90614 EEPROM and will be
the power-up default configuration.
●To max, To min - defines the temperature ranges for object temperature in PWM mode.
●Ta max, Ta min - defines temperature ranges for ambient temperature in PWM mode.
●PWM/SMBus/Relay - chooses between SMBus, PWM and Thermo Relay mode.
●PWM mode - defines single or extended PWM mode
●PWM struct - selects what data will be transmitted via the PWM.
●PWM period - defines the PWM period. A list of available settings as drop-down menu.
●PWM period repetitions - defines how many times each PWM period will be repeated.
Any even number of repetitions from 0 to 62 is valid.
●PWM pin configuration - chooses between NMOS “open drain” and “push pull” PWM
output.
●Sensor zone - defines the number IR sensors. This number is factory programmed and is
recommended not to be altered.
●SMBus address - set SMBus slave address. All values between 0 and 127 are valid. All
MLX90614 will accept communication with slave address 0. Therefore in SMBus network a
slave address 0 will be useless.
●F.I.R filter- drop-down list of settling time available via embedded in MLX90614 digital
filter. Slower settling comes with less noise.
●I.I.R filter [%] – drop-down list of available values for impulse limit. 100% passes all
impulse, 50% cuts impulse magnitude in half via embedded in MLX90614 IIR filter. Note
that the settling time depends on both FIR and IIR filters settings.
Some options are available from the drop-down menu while other must be typed by the
user. For example to change the object temperature range double click on To min or To
max field and type the new range.
To change between PWM and SMBus mode double click on PWM/SMBus/Relay field and
select from the drop-down menu the desired option (Fig.5.8).
Fig. 5.8
Note that when the Thermo relay option is selected the fields To max and To min change
in Hysteresis and Threshold respectively (Fig.5.7). Hysteresis adds to threshold on each
side. Trip points will be Threshold+Hysteresis for rising temperature and
Threshold-Hysteresis for decreasing temperature.
Tick
to view the full EEPROM memory in hexadecimal view (Fig.5.9).
Note that only highlighted cells are accessible by the user (see MLX90614 datasheet for
more information and Note 7). All other EEPROM cells contain factory calibration values
and are protected against erase and writes.
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Page 9 of 23
User Manual
Rev 004
Jan/2008