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MLX90323

Melexis
Part Number MLX90323
Manufacturer Melexis
Description 4 - 20 mA Loop Sensor Interface
Published Jan 30, 2017
Detailed Description MLX90323 4–20 mA Loop Sensor Interface with Signal Conditioning and EEPROM 1. Features and Benefits  Programmable Sens...
Datasheet PDF File MLX90323 PDF File

MLX90323
MLX90323

Overview
MLX90323 4–20 mA Loop Sensor Interface with Signal Conditioning and EEPROM 1.
Features and Benefits  Programmable Sensor Interface IC with 4 to 20 mA current loop output  Power supply from 6 to 35VDC  External or internal temperature sensor for compensating temperature errors 2.
Application Examples  Industrial pressure transducers  Strain gauges, accelerometers, position sensors, etc.
 Any bridge type sensor with current loop output 3.
Ordering information Product Code MLX90323 Temperature Code K Package Code DF Option Code AAA-000 Packing Form Code TU MLX90323 K DF AAA-000 RE Legend: Temperature Code: Package Code: Packing Form: Ordering example: K for Temperature Range -40°C to +125°C DF for SOIC300Mil RE for Reel, TU for Tube MLX90323KDF-AAA-000-TU 4.
Functional Diagram 5.
General Description VDD VBP VBN TMP GND FET VDD1 OFC Supply Regulator 3.
5V DAC_Offset OPA 0V x 35 x2 INV Hardware Gain = 70 Coarse Offset FLT 1.
24kOhm 2-bit CSGN GAIN 0.
97V/V 0.
48V/V Fine Gain DAC External Temp Sensor Internal Temp Sensor Temp Amp Gain GNTP [1:0] 3.
5V ADC 0V MicroProcessor TSTB The IC converts small changes of output voltage of full Wheatstone resistive bridge (caused by mechanical stimulus such as pressure, force, torque, light or magnetic field) to large changes of the IC output current.
It removes parasitic DC level (Offset) from the GAIN CMO CMN output bridge voltage and amplifies this signal IO1 certain times (Gain).
Offset and Gain are IO2 COMS temperature dependent, so the IC allows temperature compensation of bridge parasitic DC shift and sensitivity.
Temperature can be measured either by internal or external (resistor) temperature sensor.
The values of Offset and Gain and their temperature dependency are gotten during the calibration process and are stored in the EEPROM.
The IC has industry standard 4 – 20 mA current loop output interface and takes power directly from 2-wire signal line.
The MLX90323 works proper...


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