EVB90615 Melexis Inc, EVB90615 Datasheet - Page 22

• 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

MLX90615 has diode clamps SDA/SCL to Vdd so it is necessary to provide MLX90615 with power in order
not to load the SMBus lines.
The MLX90615 supports a 7-bit slave address in EEPROM, thus allowing up to 127 devices to be read via
two common wires. Current source pull-ups may be preferred with higher capacitive loading on the bus (C3
and C4 represent the lines’ parasitics), while simple resistive pull-ups provide the obvious low cost
advantage.
3901090615
Rev 001
11 Applications Information
11.1 Use of the MLX90615 thermometer in SMBus configuration
11.2 Use of multiple MLX90615s in SMBus configuration
C1
0.1uF
C2
0.1uF
2
2
Vdd
Vdd
Figure 19: Use of multiple MLX90615 devices in SMBus network
SDA
/P W M
SDA
/P W M
SCL
SCL
1
1
3
3
MLX90615
MLX90615
Vss
Vss
Figure 18: Connection of MLX90615 to SMBus.
C1
0.1uF
U2
U3
4
4
2
Vdd
SDA
/P W M
SCL
1
3
MLX90615
I1
Ipu1
Current source or resistor
pull-ups of the bus
Vss
U1
4
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R1
I2
Ipu2
R2
SMBus
+3.3V
SDA
Vdd
SDA
SCL
GND
R1
U2
SCL
R2
Cbus2
Cbus1
SMBus
C4
C3
+3.3V
MCU
Infra Red Thermometer
Vdd
SDA
SCL
GND
U1
MLX90615
MCU
Data Sheet
28/Aug/2008