MLX90313KDF ETC [List of Unclassifed Manufacturers], MLX90313KDF Datasheet

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Features and Benefits Dual low noise, low offset, fully programmable amplifier chain 12 bit on-chip ADC Powerful signal conditioning and linearisation unit Multiple output options: 12 bit digital through SPI, 8 bit resolution analog linear signal outputs or 10 bit ...

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MLX90313 Electrical Specifications DC Operating Parameters T = -40 A Parameter Symbol Regulator and consumption Supply voltage range Vin1 Supply voltage range Vin Supply current Idd Regulated supply voltage Vreg Regulated voltage temperature TCvr coefficient POR threshold voltage Vpor Band-gap ...

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Parameter Symbol Gain tolerance Amplifier offset Voff Input referred white noise Vntemp Chopper frequency fc Output voltage range ORtemp Output source current Iod Output sink current Ios DC Output impedance, drive rod DC Output impedance, sink ros Capacitive load TEMPOUT ...

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General Description The MLX90313 is a versatile in-circuit programmable interface, which performs signal conditioning, linearisation and ambient temperature compensation, particularly for infrared sensors combined with a thermistor. Other types of sensors can also be used in various configurations. Sensors that ...

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Pin-out Pin Symbol Description 1 TINP Temp-chain amplifier positive input 2 TINN Temp-chain amplifier negative input 3 IRINP IR-chain amplifier positive input 4 IRINN IR-chain amplifier negative input 5 VSS Supply pin 6 REL1 Open-drain relay driver output 7 IROUT ...

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Pin Descriptions TINP Temperature sensor positive input pin. The pin connects to the temp-chain amplifier and the on-chip biasing current source. The source is a mirrored version of the current running into CREF with programmable ratio. The current source can ...

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Serial data output pin for the SPI. Data is valid on the rising edge of the serial data clock (SCLK) SCLK Serial data clock from the external master to be supplied to this pin. Maximum frequency = 125kHz. CSB Active ...

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As analog output, this pin can either be connected to the analog amplified temperature sensor signal or to the linearised ambient temperature by means of the DAC. When used as ...

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Analog Section Supply regulator and Power-ON Reset The on-chip supply regulator and can be powered by an automotive ignition supply line (7V-80V). The chip can withstand SAE standard ignition transients. The resulting voltage of the regulator is available on VDD ...

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This option is available only if ENLN=1 The pin ENLN controls both the noise level and distortion of the amplifier. If ENLN=1 the noise of the amplifier is 23nVrms/ Hz, the gain first stage is available ...

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Analog-to-Digital Converter (ADC) MLX90313 contains a 12-bit internal analog to digital converter. Real 12 bit conversion is achieved by a fully differential signal path of the converter. The input amplifier of the ADC has a fixed gain of 3. Automatic ...

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TINP pin Temp-chain out TINN pin IR-chain out Digital-to-Analog Converter (DAC bit digital to analog converter can be used to output the data for the linearised Tobject- and Tambient signals. The DAC can work with a internal programmable ...

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SELDR(2:0) AGND ENDREFDIV Output drivers The IROUT and TEMPOUT outputs can be connected to various signals available: The amplified analog signals (IRINP-IRINN and TINP-TINN), the linearised object respectively ambient temperature signals the comparator circuitry. The IROUT and TEMPOUT ...

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Digital Section The digital unit on board of MLX90313 realizes all functions for control, configuration, measurements and linearisation. It contains several registers, ALU and control logic. All functions of the ASIC are hardware fixed and controlled by different state machines, ...

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Configuration and control registers overview and bit functions as they are read from the module Bit functions REGISTERH B15 B14 REGISTERL B7 B6 IRGAIN1H ENDREFDIV ENDAC IRGAIN1L GCI2 GCI1 IRGAIN2H AGNDC3 AGNDC2 IRGAIN2L RSEL2 RSEL1 TEMPGAINH TRSEL1 TRSEL0 TEMPGAINL GCT2 ...

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IRGAIN2 bit functions Bit POR val 100 X 101 X 0000-1111 RSEL[3:0] X TEMPGAIN Read access: No. The data is accessible for read via SPI only from eeprom address 02h. Write access: Directly to internal register in test mode. To ...

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CONFREG0 CONFREG0 bit functions Bit POR val IROUTC[1:0] 00b 01b 10b 11b TOUTC[1.0] 00b 01b 10b 11b SUBINC 0 1 SUBDEC 0 1 NTC 0 1 TIMEOS[3:0] 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 ...

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Write access: Only in test mode for both writing directly to internal registers and writing to Eeprom if the WP register is correctly set. This register keeps the calibration data for the time constants of digital low pass filters of ...

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Note that the last 4 bits are the status register. TOUT Read access: Directly from internal register. Write access: Directly to internal register in test mode. This register keeps the linearised ambient temperature. (Tambient) Register format: Bit ...

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MAINSTM: Reserved Read access: No Write access: Directly to internal register in test mode TEST Read access: No. Write access: Directly to internal register. This register determines the chip mode cleared after POR which corresponds to normal mode. ...

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Eeprom Description MLX90313 contains 128 x 16 EEPROM memory. The memory can be accessed through the serial interface. The 11 most significant bits are data bits and the 5 less significant bits are control bits used for the Error Check ...

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Eeprom bit definitions Following table gives the bit definitions for all addresses that can be modified by the user. All other addresses contain specific calibration data and should be left unchanged. Note that some bits marked “RES” are reserved and ...

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H2 = P(D0,D2,D3,D5,D6,D9,D10 P(D1,D2,D3,D7,D8,D9,D10 P(D4,D5,D6,D7,D8,D9,D10) The extra K bit is calculated as P(D10,D9,D8,D7,D6,D5,D4,D3,D2,D1,D0,H4,H3,H2,H1) Note :P is parity over the noted data bits. Parity the number of ones is odd. When reading ...

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Algorithm The algorithm of the ASIC is divided in several operations: ECC, initialization, offset measurement, object and ambient measurement and offset cancellation, linearisation, comparator functions. Each of this operation is controlled from the main state machine. The sequence and ...

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Error Check and Correction (ECC) The ASIC starts this procedure only after Power On Reset. The state machine reads all data in the eeprom and corrects all single errors (1 wrong bit per address) if necessary. The wrong information from ...

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Tomin, FFFh will correspond to Tomax. These two limits are determined by calibration. Accordingly the output resolution will be The r m opile Char acte r is tic V ir=f(To Vir Ta To ...

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Comp1 circuitry setting Comp1 source signal Control Bit COMP1V 0 Tobject Setting 1 Tambient 12 Linearised T ambient 12 2/1 MUX Linearised T object COMP1V Threshold address:73h Comparator1 (COMP1) Configuration diagram Note that the threshold for COMP1, is always in ...

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The threshold data can be calculated by the formula: Tthr Threshold value = T max where: Tthr is the target temperature for the comparator Tmin, Tmax are the minimum and maximum temperature under calibration. The hysteresis value can be calculated ...

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The communication protocol is presented below. CS SCLK SDI SDO ...

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The operation code is the first series of 8bits in a command, C[7:0] in the figure on the protocol above. Below table summarizes the operations available in MLX90313. Operation Codes mnem. C[7: ...

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Applications Information IR sensor IR+ IRINP IR- IRINN Thermisto r Rsens TINP VSS TINN MLX9024 7 AGND CREF Rbias 100k high prec. 10u In the above application diagram, a simple thermometer with alarm function is depicted. As external components there ...

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Support Tools In a short time Melexis will provide a demo board which can demonstrate all MLX90313’s features. This will come with software which allows easy configuration of the MLX90313. Please have a look at www.melexis.com for latest info. ESD ...

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POR power –on reset: reset circuit that starts the digital system in a known state whenever the supply voltage is cycled PSSR Power Supply Rejection Ratio: Measure for an amplifier’s immunity to disturbances on the supply connections. PTC See Thermistor. ...

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Disclaimer Melexis reserves the right to periodically make modifications to product specifications. The information included herein is believed to be accurate and reliable. However, Melexis assumes no responsibility for its use; nor for any infringements of patents or other rights ...

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Physical Characteristics 0.50 0.33 For the latest version of this document our website at: Or for additional information contact Melexis Direct: E-mail: sales_europe@melexis.com MLX90313 Programmable IR sensor Interface 3901090313 Programmable IR Sensor Interface 1.27 12.99 12.70 www.melexis.com Europe ...