MLX90614ESF-DCA Melexis Inc, MLX90614ESF-DCA Datasheet - Page 15

• Manufacturer Part Number: MLX90614ESF-DCA
• Description: IC THERMOMETER IR SGL 3V TO-39
• Manufacturer: Melexis Inc

Specifications of MLX90614ESF-DCA

• 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: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: TO-39-3, TO-205AD, Metal Can
• For Use With: EVB90614 - BOARD EVAL FOR MLX90614
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Note*: This address is readable and writable. Bit 3 should not be altered as this will cancel the factory
calibration.
Note**: EEPROM error signaling is implemented in automotive grade parts only.
8.4.2 Differences with the standard SMBus specification (reference [1])
There are eleven command protocols for standard SMBus interface. The MLX90614 supports only two of
them. Not supported commands are:
Supported commands are:
8.4.3 Detailed description
The PWM/SDA pin of MLX90614 can operate also as PWM output, depending on the EEPROM settings. If
PWM is enabled, after POR the PWM/SDA pin is directly configured as PWM output. The PWM mode can be
avoided and the pin can be restored to its Data function by a special command. That is why hereafter both
modes are treated separately.
8.4.3.1 Bus Protocol
After every 8 bits received by the SD an ACK/NACK takes place. When a MD initiates communication, it first
sends the address of the slave and only the SD which recognizes the address will ACK, the rest will remain
silent. In case the SD NACKs one of the bytes, the MD should stop the communication and repeat the
message. A NACK could be received after the PEC. This means that there is an error in the received
message and the MD should try sending the message again. The PEC calculation includes all bits except the
3901090614
Rev 006
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Quick Command
Byte commands - Sent Byte, Receive Byte, Write Byte and Read Byte
Process Call
Block commands – Block Write and Write-Block Read Process Call
Read Word
Write Word
PEC
Rd
Wr
Sr
1
S
S
A
S
Slave Address
Repeated Start Condition
Read (bit value of 1)
Write (bit value of 0)
Start Condition
Acknowledge (this bit can be 0 for ACK and 1 for NACK)
Stop Condition
Packet Error Code
Master-to-Slave
Slave-to-Master
7
Figure 4: SMBus packet element key
Wr
1
Page 15 of 49
A
1
Data Byte
Infra Red Thermometer in TO-39
8
A
1
Single and Dual Zone
P
1
September 30, 2010
Data Sheet