EVB90614 Melexis Inc, EVB90614 Datasheet - Page 21

• 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: -

Extended - S1
Extended - S2
8.5 PWM
The MLX90614 can be read via PWM or SMBus compatible interface. Selection of PWM output is done in
EEPROM configuration (factory default is SMBus). PWM output has two programmable formats, single and
dual data transmission, providing single wire reading of two temperatures (dual zone object or object and
ambient). The PWM period is derived from the on-chip oscillator and is programmable.
Note: Serial data functions (2-wire / PWM) are multiplexed with a thermal relay function (described in the
“Thermal relay” section).
* not recommended for extended PWM format operation
3901090614
Rev 006
PWM type
Single
Config Register[5:4]
0
0
10*
Start
00
01
11
t1
1/16 - high
1/16 - high
1/8 – high
Start
16
t1
1
T
t1
Figure 13: PWM timing single (above) and extended PWM (bellow)
Valid data band
1
8
Sensor 1
T
PWM1 data
t2
4/16 - high
4/16 - var
4/8 - var
T
T
t2
Ta
Ta
obj1
obj2
Table 12: PMW configuration table
Valid data band
16
5
Error band
Sensor 1
2/16 - high
T
PWM2 data
2/16
Table 13: PMW timing
Undefined
t2
2/8
t3
t3
T
T
T
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obj1
obj2
obj2
16
7
Stop
T
t4
1/16 - high
1/16 - low
1/8 – low
16
8
T
t4
t5
Ta
Ta
Tmin,1
16
9
To
To
Infra Red Thermometer in TO-39
range
range
T
min
min
Valid data band
,L
,L
5
8
1/16 - high
MLX90614 family
1/16 - low
Sensor 2
T
NA
t5
t6
Ta
Ta
Error band
Tmax,1
To
To
range
range
max
max
t3
Single and Dual Zone
,H
,H
4/16 – low
4/16 - var
13
16
13
16
NA
t6
Error band
Sensor 2
T
T
Tmin,2
To
To
To
N.A.
7
8
t7
min
min
min
September 30, 2010
T
Stop
2/16 - low
15
16
t4
2/16
NA
T
t7
t8
Tmax,2
T
T
Data Sheet
To
To
To
N.A.
max
max
max
1/16 - low
1/16 - low
NA
t8