EVB90308 Melexis Inc, EVB90308 Datasheet - Page 19

• Manufacturer Part Number: EVB90308
• Description: DEMO KIT MLX90308 SENS INTERFACE
• Manufacturer: Melexis Inc

Specifications of EVB90308

• Rohs Status: RoHS non-compliant
• Main Purpose: Interface, Sensor to ADC Interface, Programmable
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: MLX90308
• Primary Attributes: MCU Controlled Signal Conditioning for Bridge-Type Sensors
• Secondary Attributes: GUI, Output Types: Absolute Voltage, Ratiometric Voltage, Current Output Mode
• Other names: DK90308; DK90308

Notes For Table 11
1. Not all the temperature and pressure coefficients
must be used. When a coefficient is unused, the eight
LSB’s and the four MSB’s are replaced by 0.
2. The level steering and the alarm mode cannot be
active simultaneously because the levels bytes are
shared with the two modes.
3. If the alarm mode and the level steering are both
active, the level steering mode is dominant. The
firmware will run with the level steering mode, by
default.
4. If the DIGMO mode (VMO and CMO both active) is
active, the alarm will be automatically disabled by the
firmware.
5. At PNB_TNB address, the four MSB's correspond
to the address of the last pressure point and the four
LSB’s to the address of the last temperature point.
6. In the alarm_control variable, the selected
input is stored on the three MSB’s.
7. Pi and OFi are 10 bit values, right justified in 12
bits fields.
Table 13. RAM Byte Definitions
MLX902xx Name of Sensor Rev Y.X 22/Aug/98
3901090308
Rev 006
0
1
2
3
4
5
6
7
8
9
10
Functions
MODE byte
GN1L
OF1L
GNTC1L
OFTC1L
TR1L
PC5L
GNTC2L
P5L
OFTC2L
PC4L
TR2L
P4L
GNTC3L
PC3L
OFTC3L
P3L
Remarks
See Table 9.
Fixed gain number (8LSB).
Fixed offset number (8LSB).
First gain TC (8LSB).
First offset TC (8LSB).
First temperature point.
Pressure Coefficient 5 (8LSB).
Second gain TC.
Pressure point 5 (8LSB).
Second offset TC.
Pressure coefficient 4 (8LSB).
Second temperature point.
Pressure Point 4 (or Signature) (8LSB).
Third gain TC.
Pressure Coefficient 3 (or Signature) (8LSB).
Third offset TC.
Pressure Point 2 (or Signature) (8LSB).
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Table 12. Bit Definitions;
Coarse Control , Byte 2
Bit Symbol Function
Programmable Sensor Interface
7
6
5
4
3
2
1
0
CSOF 1 Coarse offset of signal amplifier.
CSOF 0 CSOF = 0 to 3.
CSGN2
CSGN1
CSGN0
GNTP1 Gain & offset of temperature
GNTP0 GNTP = 0 to 3.
IINV
Invert signal sign.
amplifier.
Coarse gain of signal amplifier.
CSGN = 0 to 7. If CSGN > 3,
output range = 0 to 10V. If
CSGN <= 3, output range = 0 to
5V.
MLX90308
Apr/04