EVB90614 Datasheet, PDF (50/52 Pages) Melexis Microelectronic Systems – Single and Dual Zone Infra Red Thermometer in TO-39

MLX90614 family
Single and Dual Zone
Infra Red Thermometer in TO-39
17 Table of figures
Figure 1: Typical application schematics........................................................................................................... 1
Figure 2: Pin description ................................................................................................................................... 5
Figure 3: Block diagram.................................................................................................................................. 10
Figure 4: SMBus packet element key.............................................................................................................. 15
Figure 5: SMBus read word format ................................................................................................................. 16
Figure 6: SMBus write word format ................................................................................................................. 16
Figure 7: Recommended timing on SMBus ..................................................................................................... 16
Figure 8: Read word format (SA=0x5A, read RAM=0x07, result=0x3AD2, PEC=0x30).................................... 17
Figure 9: Write word format (SA=0x5A, write EEPROM=0x02, data=0xC807, PEC=0x48)............................... 17
Figure 10: SMBus timing specification and definition....................................................................................... 18
Figure 11: Enter sleep mode command (SA = 0x5A, Command = 0xFF, PEC = 0xE8) .................................... 19
Figure 12: Exit Sleep Mode............................................................................................................................. 19
Figure 13: Undershoot of SCL line due to on chip synthesized Zener diode (5V versions only)........................ 20
Figure 14: PWM timing single (above) and extended PWM (bellow)................................................................ 21
Figure 15: PWM example single mode............................................................................................................ 22
Figure 16: Extended PWM format with DUAL [5:1] = 01h (2 repetitions for each data)..................................... 23
Figure 17: Example: Extended PWM mode readings – sensor 1 above and sensor 2 bellow .......................... 23
Figure 18: Switching from PWM mode to SMBus ............................................................................................ 26
Figure 19: Request (switch to SMBus) condition ............................................................................................. 26
Figure 20: Software flow ................................................................................................................................. 29
Figure 21: Thermal relay: “PWM” pin versus Tobj ........................................................................................... 30
Figure 22: Accuracy of MLX90614 (Ta, To)..................................................................................................... 32
Figure 23: Accuracy of MLX90614DAA (Ta, To) for medical applications. Accuracy of the MLX90614DCH and
DCI for VDD = 3V (see paragraph 10.1.3)................................................................................................ 33
Figure 24: Typical Ta dependence from supply voltage................................................................................... 34
Figure 25: Typical To dependence from supply voltage (practically the same as Ta dependence error ............ 34
Figure 26: Typical To compensated dependence error.................................................................................... 34
Figure 27: Field Of View measurement ........................................................................................................... 35
Figure 28: Typical FOV of MLX90614xAA ....................................................................................................... 35
Figure 29: Typical FOV of MLX90614xBA ....................................................................................................... 36
Figure 30: Identification of zone 1&2 relative to alignment tab ......................................................................... 36
Figure 31: Typical FOV of MLX90614xCC ...................................................................................................... 36
Figure 32: Typical FOV of MLX90614xCF....................................................................................................... 37
Figure 33: Typical FOV of MLX90614xCH ...................................................................................................... 37
Figure 34: Typical FOV of MLX90614xCI ........................................................................................................ 38
Figure 35: MLX90614 SMBus connection ....................................................................................................... 39
Figure 36: Use of multiple MLX90614 devices in SMBus network.................................................................... 39
Figure 37: Connection of MLX90614 for PWM output mode ............................................................................ 40
Figure 38: PWM output with SMBus available................................................................................................. 40
Figure 39: Thermal alert / thermostat applications of MLX90614 ..................................................................... 40
Figure 40: 12V regulator implementation......................................................................................................... 41
Figure 41: MLX90614xxA package ................................................................................................................. 47
Figure 42: MLX90614xCC package ................................................................................................................ 47
Figure 43: MLX90614xCF package................................................................................................................. 48
Figure 44: MLX90614xCH package ................................................................................................................ 48
Figure 45: MLX90614xCI package .................................................................................................................. 49
3901090614
Rev 008
Page 50 of 52
Data Sheet
February 28, 2013