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MLX90616ESF-HCA-000-TU Folha de dados(PDF) 9 Page - Melexis Microelectronic Systems |
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MLX90616ESF-HCA-000-TU Folha de dados(HTML) 9 Page - Melexis Microelectronic Systems |
9 / 36 page MLX90616ESF-HCA Infra Red Thermometer in TO-39 for high temperature thermometer guns 3901090616 Page 9 of 36 Data Sheet Rev 002 August 20, 2012 8.3.2 Supply regulator and POR The Power On Reset (POR) is connected to Vdd supply. The on-chip POR circuit provides an active (high) level of the POR signal when the Vdd voltage rises above approximately 0.5V and holds the entire MLX90616 in reset until the Vdd is higher than the specified POR threshold VPOR. During the time POR is active, the POR signal is available as an open drain at the PWM/SDA pin. After the MLX90616 exits the POR condition, the function programmed in EEPROM takes precedence for that pin. 8.3.3 EEPROM A limited number of addresses in the EEPROM memory can be changed by the customer. The whole EEPROM can be read through the SMBus interface. EEPROM (32X16) Name Address Write access Tomax 0x000 Yes Tomin 0x001 Yes PWMCTRL 0x002 Yes Ta range 0x003 Yes Emissivity correction coefficient 0x004 Yes Config Register1 0x005 Yes Calibration coefficients 0x006 Calibration mode … … … Calibration coefficients 0x00D Calibration mode SMBus address 0x00E Yes Calibration coefficients 0x00F Yes Calibration coefficients 0x010 Calibration mode … … … Calibration coefficients 0x018 Calibration mode Config Register2 0x019 Yes Melexis reserved 0x01A No Melexis reserved 0x01B No ID number 0x01C No ID number 0x01D No ID number 0x01E No ID number 0x01F No Table 4: EEPROM table The addresses Tomax, Tomin and Ta range are for customer dependent object and ambient temperature ranges. For details see section 8.5.2 below in this document The address Emissivity contains the object emissivity (factory default 1.0 = 0xFFFF), 16 bit. Emissivity = dec2hex[ round( 65535 x ε) ] Where dec2hex[ round( X ) ] represents decimal to hexadecimal conversion with round-off to nearest value (not truncation). In this case the physical emissivity values are ε = 0.1…1.0. Erase (write 0) must take place before write of desired data is made. |
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Descrição semelhante - MLX90616ESF-HCA-000-TU |
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