MLX902xx Name of Sensor
Rev Y.X
22/Aug/98
Page 1
MLX90308CAB
Programmable Sensor Interface
MLX90308CAB Programmable Sensor Interface
Page 1
Rev 3.0 21/May/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
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 Information
art No.
Temperature Suffix
Package
Option
Temperature Range
MLX90308CAB
L
LW
-40C to 140C Automotive
MLX90308CAB
L
UD*
-40C to 140C Automotive
*UD denotes unpackaged die
Description
The MLX90308CAB 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 MLX90308CAB 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.
Figure 1.
Pinning
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