MLX902xx Name of Sensor

Rev Y.X

22/Aug/98

Page 1

MLX90314AB

Programmable Sensor Interface

MLX90314AB Programmable Sensor Interface

Page 1

Rev 2.2

23/Oct/01

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

Mass calibration easy with 2400 or 9600 baud UART

Applications

Pressure transducers

Accelerometers

Temperature sensor assemblies

Linear position sensors

Ordering Information

art No.

Temperature Suffix

Package

Option

Temperature Range

MLX90314AB

L

LW

-40C to 140C

MLX90314AB

L

UD*

-40C to 140C

*UD denotes unpackaged die

Description

The MLX90314AB 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 MLX90314AB

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.