MLX90314
Programmable Sensor Interface
Features and Benefits
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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 11V
DC
; 4 to 20 mA loop
Mass calibration easy with 2400 or 9600 baud UART
Power supply from 6 to 35V
DC
Applications
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Pressure transducers
Accelerometers
Temperature sensor assemblies
Linear position sensors
Ordering Information
Part No.
MLX90314
MLX90314
Temperature Suffix
L ( -40C to 150C )
L ( -40C to 150C )
Package
DF (SOIC16w)
UF
(die on foil)
Description
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 re-
programmable. 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.
MLX902xx Name of Sensor Rev Y.X 22/Aug/98
3901090314
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Page 1
Nov/04
Rev 007
MELEXIS [ Melexis Microelectronic Systems ]
