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{"title":"SMD SMT AD590MF FlatPack 2 Temperature Sensor Chip AD590M","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/77\/ea\/a8d2b4e0aeb546d9e28e939cc388-200x200-1\/smd_smt_ad590mf_flatpack_2_temperature_sensor_chip_ad590m.jpg","attrs":{"Model Number":"AD590MF","Brand Name":"original","Certification":"ISO9001:2015standard","Place of Origin":"original"}}
LM335AZT New original Board Mount Temperature Sensors Precision 1 Deg Cel transistors manufacturers
Features
■ Directly calibrated in °K
■ 1°C initial accuracy
■ Operates from 450µA to 5mA
■ Less than 1Ω dynamic impedance
Description
The LM135, LM235, LM335 are precision temperature sensors which can be easily calibrated. They operate as a 2-terminal Zener and the breakdown voltage is directly proportional to the absolute temperature at 10mV/°K.
The circuit has a dynamic impedance of less than 1Ω and operates within a range of current from 450µA to 5mA without alteration of its characteristics
Calibrated at +25°C, the LM135, LM235, and LM335 have a typical error of less than 1°C over a 100°C temperature range. Unlike other sensors, the LM135, LM235, LM335 have a linear output.
Application information
There is an easy method of calibrating the device for higher accuracies
The single point calibration works because the output of the LM135, LM235, LM335 is proportional to the absolute temperature with the extrapolated output of sensor going to 0V at 0°K (-273.15°C). Errors in output voltage versus temperature are only slope. Thus a calibration of the slope at one temperature corrects errors at all temperatures.
The circuit output (calibrated or not) is given by the equation:
VOT + VOTO x where T is the unknown temperature and To is the reference temperature (in °K).
Nominally, the output is calibrated at 10mV/°K.
Precautions should be taken to ensure good sensing accuracy. As in the case of all temperatures sensors, self-heating can decrease accuracy. The LM135, LM235, and LM335 should operate with a low current but sufficient to drive the sensor and its calibration circuit to their maximum operating temperature
If the sensor is used in surroundings where the thermal resistance is constant, the errors due to self-heating can be externally calibrated. This is possible if the circuit is biased with a temperature stable current. Heating will then be proportional to Zener voltage and therefore temperature. In this way, the error due to self-heating is proportional to the absolute temperature as scale factor errors.
Founded in 2004, Walton Electronics CO.,LTD is a scaled and professional independent distributor of electronic components in Shenzhen , China. Committed to the world's leading brands of electronic components distribution integration services, mainly engaged in active components , integrated circ... Founded in 2004, Walton Electronics CO.,LTD is a scaled and professional independent distributor of electronic components in Shenzhen , China. Committed to the world's leading brands of electronic components distribution integration services, mainly engaged in active components , integrated circ...
