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MLX90614KSF-AAB データシート(PDF) 11 Page - Melexis Microelectronic Systems |
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MLX90614KSF-AAB データシート(HTML) 11 Page - Melexis Microelectronic Systems |
11 / 40 page MLX90614 family Single and Dual Zone Infra Red Thermometer in TO-39 3901090614 Page 11 of 40 Data Sheet Rev 003 03/Oct/2007 8.3 Block description 8.3.1 Amplifier A low noise low offset amplifier with programmable gain is implemented for amplification of the IR sensor voltage. With a carefully designed input modulator and balanced input impedance, an offset as low as 0.5µV is achieved. 8.3.2 Supply regulator and POR The module can operate from 2 different supplies: VDD= 5V => MLX90614Axx VDD=3.3V => MLX90614Bxx (battery or regulated supply) Refer to “Applications information” section for information about adopting higher voltage supplies. 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 MLX90614xxx in reset until the Vdd is higher than the specified POR threshold VPOR (note that this level is different for MLX90614Axx and MLX90614Bxx). During the time POR is active, the POR signal is available as an open drain (active high) at the PWM/SDA pin. After the MLX90614xxx 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 via SMBus interface. EEPROM (32X16) Name Address Write acces Tomax 000h Yes Tomin 001h Yes PWMCTRL 002h Yes Ta range 003h Yes Emissivity correction coefficient 004h Yes Config Register1 005h Yes Melexis reserved 006h No … … … Melexis reserved 00Dh No SMBus address 00Eh Yes Melexis reserved 00Fh Yes Melexis reserved 010h No … … … Melexis reserved 018 No Melexis reserved 019h Yes Melexis reserved 01Ah No Melexis reserved 01Bh No ID number 01Ch No ID number 01Dh No ID number 01Eh No ID number 01Fh No The addresses Tomax, Tomin and Ta range are for customer dependent object and ambient temperature ranges. For details see point 8.5.3 below in this document The address Emissivity contains the object em sivity (factory default 1.0 = 0xFFFF), 16 bit. is 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. |
同様の部品番号 - MLX90614KSF-AAB |
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同様の説明 - MLX90614KSF-AAB |
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