MLX90314
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MLX90314LDF-BAA-000-RE (pdf) |
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MLX90314 Programmable Sensor Interface Features and Benefits • Microprocessor-controlled signal conditioning for bridge-type sensors • Suited for low-cost sensors reduction of non-linearity by programmable coefficients • External or internal temperature sensor for compensating temperature errors • Versatile output signal ranges 4, 5, 10, or 11VDC 4 to 20 mA loop • Mass calibration easy with 2400 or 9600 baud UART • Power supply from 6 to 35VDC Applications • Pressure transducers • Accelerometers • Temperature sensor assemblies • Linear position sensors Ordering Code Product Code Temperature Code Package Code Option Code MLX90314 MLX90314 Legend: BAA-000 BAA-000 Temperature Code Package Code Packing Form: L for Temperature Range -40°C to 150°C DF for SOIC300Mil RE for Reel, TU for Tube Packing Form Code TU RE Ordering example: MLX90314LDF-BAA-000-TU The MLX90314 is a dedicated microcontroller which performs signal conditioning for sensors wired in bridge or differential configurations. Sensors that can be used include thermistors, strain gauges, load cells, pressure sensors, accelerometers, etc. The signal conditioning includes gain adjustment, offset control, high order temperature and linearity compensation. Compensation values are stored in EEPROM and are reprogrammable. Programming is accomplished by using a PC, with an interface circuit level shifting and glue logic , and provided software. The application circuits can provide an output of an absolute voltage, relative voltage, or current. The output can be range limited with defined outputs when the signal is beyond the programmed limits. Other features include alarm outputs and level steering. The robust electrical design allows the MLX90314 to be used where most signal conditioning and sensor interface circuits cannot be used. Voltage regulation control is provided for absolute voltage and current modes external FET required . The standard package is a plastic SO16W. The device is static-sensitive and requires ESD precautions. Apr/12 MLX90314 Programmable Sensor Interface Apr/12 MLX90314 Programmable Sensor Interface Table MLX90314 Electrical Specifications DC operating parameters TA = -40 to 140oC, VDD1 = 6 to 35VDC unless otherwise specified . Parameter Regulator & Consumption Input voltage range Symbol Test Conditions VDD1 Regulator connected Supply current TA = 100ºC Current Mode Supply current TA = 100ºC Voltage Mode Regulated supply voltage VREG Regulated voltage temperature coefficient Supply rejection ratio PSRR VDD1 > 6V Instrumentation Amplifier Differential input range VBP-VBN IINV = 0 Differential input range VBP-VBN IINV = 1 Common mode input range 1/2 VBP+VBN Min Typ Max Units -600 uV / ºC mV/V Vdd mV/V Vdd %VDD Pin leakage current Common mode rejection Ratio CMRR Hardware gain Coarse offset control Range Fixed offset control range IA chopper frequency Pins VBP & VBN to GND, VDD = 84 V/V CSOF[1:0] = 00 CSOF[1:0] = 01 CSOF[1:0] = 10 CSOF[1:0] = 11 High Low |
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