mlx90308 Melexis Company, mlx90308 Datasheet - Page 7

• Manufacturer Part Number: mlx90308
• Description: Programmable Versatile Sensor Interface
• Manufacturer: Melexis Company

Unique Features
Customization
Melexis can customize the MLX90308 in both
hardware and firmware for unique requirements. The
hardware design provides 64 bytes of RAM, 3 kbytes
of ROM, and 48 bytes of EEPROM for use by the
firmware.
Special Information
The output of the sensor bridge is amplified via offset
and gain amplifiers and then converted to the correct
output signal form in one of the output stages.
The sensitivity and offset of the analog signal chain
are defined by numbers passed to the DAC interfaces
from the microcontroller core (GN[9:0] and OF[9:0]).
The wide range of bridge offset and gain is
accommodated by means of a 2-bit coarse adjustment
DAC in the offset adjustment (CSOF[1:0]), and a
similar one in the gain adjustment (CSGN[2:0]). The
signal path can be directed through the processor for
digital processing. Two I/O pins are available for
analog inputs or digital outputs. These pins can be
used for alarms on various points on the analog signal
path and built-in or external temperature values.
Programming and Setup
The MLX90308 needs to have the compensation
coefficients programmed for a particular bridge
sensor
Programming the EEPROM involves some
minimal
Melexis’ setup software, and a PC. The
communications interface circuitry is available in
a
communicates with the PC via a standard RS-
232 serial communications port.
Cross Reference
There are no known devices which the MLX 90308
can replace.
ESD Precautions
Observe standard ESD control procedures for CMOS
semiconductors.
MLX902xx Name of Sensor Rev Y.X 22/Aug/98
3901090308
Rev 006
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Page 7
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Table 2. Absolute Maximum Ratings
Supply voltage (ratiometric) V
Supply voltage (ratiometric) V
Supply voltage (operating),
Reverse voltage protection
Supply current, Current Mode, I
Supply current, Voltage Mode, I
Output current, I
Output current (short to V
Output current (short to V
Output voltage, V
Power dissipation, P
Operating temperature range, T
Storage temperature range, T
Maximum junction temperature, T
Programmable Sensor Interface
VMO
VMO
D
DD
SS
DD
DD
), I
V
), I
MLX90308
DD1
Min
Max
S
SCVMO
SCVMO
DD
DD
A
Max
J
-40 to +140°
-55 to +150°
100mA
3.5mA
4.5mA
71mW
150°C
-0.7V
+11V
4.5V
8mA
8mA
Apr/04
35V
6V