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MLX90615 Datenblatt(PDF) 9 Page - Melexis Microelectronic Systems

Teilenummer MLX90615
Bauteilbeschribung  Infra Red Thermometer
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Hersteller  MELEXIS [Melexis Microelectronic Systems]
Direct Link  http://www.melexis.com
Logo MELEXIS - Melexis Microelectronic Systems

MLX90615 Datenblatt(HTML) 9 Page - Melexis Microelectronic Systems

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MLX90615
Infra Red Thermometer
3901090615
Page 9 of 32
Data Sheet
Rev 005
08 November 2013
0.5µV. As the device is factory calibrated any change of gain settings would require new calibration of object
channel.
8.3.2 Power-On-Reset (POR)
The Power On Reset (POR) is connected to the Vdd supply. The on-chip POR circuit provides an
active level of the POR signal when the Vdd voltage rises above approximately 0.5V and holds the entire
MLX90615 in reset until the Vdd is higher than the specified POR threshold VPOR. During the time POR is
active, the POR signal is available as a weak open drain (active high) at the SDA pin. After the MLX90615
exits the POR state, the functions programmed in the EEPROM take control of that pin.
8.3.3 EEPROM
A limited number of addresses in the EEPROM memory are of interest for the customer. The whole
EEPROM can be read and written with the SMBus interface. The entire EEPROM content between
addresses 0x04 and 0x0D must be kept unaltered or the factory calibration of the device will be lost.
EEPROM (16X16)
Name
Address
Write access
PWM T min / SMBus slave address (SA)
0x00
Yes
PWM T range
0x01
Yes
Config
0x02
Yes
Emissivity
0x03
Yes
Melexis reserved (factory calibration)
0x04
Yes
Melexis reserved (factory calibration)
0x0D
Yes
ID number
0x0E
No
ID number
0x0F
No
Table 6 EERPOM table
SMBus slave address
: 7 LSBs (6...0) contains the SMBus slave address that the MLX90615 will
respond to. Note that all MLX90615 will respond to SA=0x00 and therefore this value is useless in a network.
Factory default SA is 0x5B, max 127 devices on one line SA=0x01 …0x7F
PWM T min:
15 bit for the minimum temperature when PWM is used – right justified (factory default
is 0x355B, which corresponds to +0.03°C)
PWM T range:
15 bit range for the PWM signal temperature (TMAX – TMIN) – right justified (factory
default is 0x09C4, which corresponds to a PWM range of 50.01°C).
The Config register consist of control bits to configure the thermometer after POR:


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