EVB90615 Melexis Inc, EVB90615 Datasheet - Page 9

• Manufacturer Part Number: EVB90615
• Description: EVAL BOARD FOR MLX90615
• Manufacturer: Melexis Inc

Specifications of EVB90615

• Sensor Type: Temperature
• Sensing Range: -40°C ~ 85°C
• Interface: SMBus (2-Wire/I²C)
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: MLX90615
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Voltage - Supply: -
• Sensitivity: -
• Other names: Q4435148

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 V
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 4h and
Dh must be kept unaltered or the factory calibration of the device will be lost.
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 00h and therefore this value is useless in a network. Factory
default is 5Bh.
PWM T min: 15 bit limit for the PWM signal minimum temperature – right justified (factory default is 355Bh,
which corresponds to +0.03°C)
PWM T range: 15 bit range for the PWM signal temperature (Tmax – Tmin) – right justified (factory default is
09C3h, which corresponds to a PWM range +0.03…+50.01°C).
The Config register consist of control bits to configure the thermometer at POR:
Bit number
Bit 0
Bit 1
Bit 2
Bit [11:3]
Bits [14:12]
Bit [15]
*Note: IIR setting 000b must be avoided
3901090615
Rev 001
1
0
0
Device specific
001b
0
SMBus slave address (SA) / PWM T min
PWM T range
Config
Emissivity
Melexis reserved (factory calibration)
…
Melexis reserved (factory calibration)
Factory default value
EEPROM address 02h
IIR setting at
[binary]
001
010
011
100
101
110
111
ID number
ID number
Name
EEPROM (16X16)
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Function
SMBus/ PWM mode select
PWM frequency (doesn’t
matter in SMBus mode)
PWM output temperature
Factory calibration do not alter
IIR settings*
Must be kept 0
Settling time
[samples]
10
18
24
31
38
45
1
POR
Address
. During the time POR is active, the POR
Dh
0h
1h
2h
3h
4h
Eh
Fh
Spike response
…
14.286
33.(3)
16.(6)
Infra Red Thermometer
100
50
25
20
%
Write acces
Yes
Yes
Yes
Yes
Yes
Yes
No
No
…
MLX90615
1 – SMBus
1 - Low
1 - Ta
Data Sheet
28/Aug/2008
0 - PWM
0 - High
0 - To