MLX90308LUF MELEXIS [Melexis Microelectronic Systems], MLX90308LUF Datasheet
MLX90308LUF
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MLX90308LUF Summary of contents
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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 10, or 11V Mass calibration easy ...
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Rev 006 Programmable Sensor Interface Page 2 MLX90308 Apr/04 ...
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Table 1. MLX90308 Electrical Specifications DC operating parameters -40 to 140 A Parameter Symbol Instrumentation Amplifier * CSGN = 100 to 111: voltage mode only, not applicable to current mode. Output > 6.5V; MSB = 1 Output < ...
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Table 1. MLX90308 Electrical Specifications (continued) DC operating parameters -40 to 140 A Parameter Voltage Mode Output Stage ( See Voltage Mode) 3901090308 Rev 006 Programmable Sensor Interface 35V (unless otherwise specified). ...
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Table 1. MLX90308 Electrical Specifications (continued) DC operating parameters -40 to 140 A Parameter MLX902xx Name of Sensor Rev Y.X 22/Aug/98 3901090308 Rev 006 Programmable Sensor Interface 35V (unless otherwise specified). DD1 ...
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Table 1. MLX90308 Electrical Specifications (continued) DC operating parameters -40 to 140 A Parameter 3901090308 Rev 006 Programmable Sensor Interface 35V (unless otherwise specified). DD1 DC Test Conditions Min Page 6 MLX90308 ...
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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 ...
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Table 3. Pin Description Signal Description Name 1,2 I/O1, 2 Bi-directional I/O. Can also be used as input to A/D converter. I/O can be controlled by serial communications or by firmware as alarm inputs or level out. (unconnected when not ...
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Analog Features Supply Regulator A bandgap-stabilized supply-regulator is on-chip while the pass-transistor is external. The bridge-type sensor is typically powered by the regulated supply (typically 4.75V). For ratiometric operation, the supply-regulator can be disabled by connecting unregulated and regulated supply ...
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Digital Features Microprocessor, LX11 Core, Interrupt Controller, Memories The LX11 microcontroller core is described in its own datasheet overview, this implementation of the LX11 RISC core has following resources: Two accumulators, one index and two interrupt accumulators. 15 ...
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Different Modes Analog Mode The parameters OF and GN represent, respectively, offset correction and span control, while OFTCi and GNTCi represent their temperature (thermal zero shift and thermal span shift). After reset, the firmware continuously calculates the offset and gain ...
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Compensation Trade-Offs A compromise must be made between temperature compensation and pressure correction. The EEPROM space where the signal coefficients are stored is shared with the temperature coefficients, with the result that an EEPROM byte can be used either for ...
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Alarm Option This option allows controlling the low and high limits of the output (See Figure 5.). The output level is set when the output tries to exceed the programmed limits. Five bytes are reserved for this option. The first ...
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Level Steering The level steering option allows configuration of the IO pins as outputs to indicate the relative level of a selected signal. See Figure 7. The levels at which the two outputs change state are programmed by the user. ...
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UART Commands The commands can be divided into three parts: (1) downloading of data from the ASIC, (2) uploading of data to the ASIC and (3) the reset command. All the commands have the same identification bits. The two MSB’s ...
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Table 10. Examples of Fixed Point Signed Numbers Table 11. EEPROM Byte Definitions Designation MODE byte 1 Cadj 2 Coarse Control 3 GN1L 4 OF1L 5 GNTC1L 6 OFTC1L 7 TR1L PC5L 8 GNTC2L P5L 9 OFTC2L PC4L 10 TR2L ...
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Table 11. EEPROM Byte Definitions (continued) Designation MLX902xx Name of Sensor Rev Y.X 22/Aug/98 3901090308 Rev 006 Programmable Sensor Interface Note The eight LSB's of the third offset ...
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Table 11. EEPROM Byte Definitions (continued) Designation PNB_TNB 25 n_factor 26 Not used 27 ALARM low trigger Level1 IO2/IO1 28 ALARM low output Level2 IO2/IO1 29 ALARM high trigger Level3 IO2/IO1 30 ALARM high out level 31 ALARM control byte ...
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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 The level steering and the alarm mode cannot ...
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Table 13. RAM Byte Definitions (continued) Byte Functions 11 TR3L PC2L 12 GNTC4L P2L 13 OFTC4L PC1L 14 DIGMOP1L 15 GN1[9:8] OF1[9:8] 16 GNTC1 OFTC1 [11:8] [11:8] 17 TR1[9:8] GNTC2 [11:8] PC5[11:8] P5[9:8] 18 TR2[9:8] PC4[11:8] P4[9:8] 19 PC3[11:8] P3[9:8] ...
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Table 13. RAM Byte Definitions (continued) Byte Functions 30 ALARM control byte IO1/IO2 control byte 31 ALARM low trigger level IO1/IO2 level 1 32 ALARM low output level IO1/IO2 level 2 33 ALARM high trigger level IO1/IO2 level 3 34 ...
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Prototyping Melexis offers an MLX90308 evaluation kit which contains an evaluation circuit board, serial interface cable, and software diskette. The circuit board provides the necessary circuitry applications circuits shown on the next page. Also included in the circuit board is ...
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Typical 90308 Applications Figure 9a. Absolute Voltage Mode 5K VDD COMS 100 nF VBP VBN Figure 9b. Ratiometric Voltage Mode 5K VDD COMS 100 nF VBP VBN TMP Figure 9c. Current Mode 5K VDD COMS 100 nF VBP VBN TMP ...
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Figure 10. Application Example Figure 10a. Programmable Oil Pressure Gauge of the supply voltage. The MLX90308 can be operated in Ratiometric Voltage Mode, in which the output (VMO) is tied to an A/D converter sharing the same supply and ground ...
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Figure 11. Error Compensation Figure 11a. Raw Sensor Output (measured between VPB and VBN) 170 0 0% Pressure Figure 11b. Conditioned Sensor Output Pressure Figures 11a and 11b above illustrate the performance of an unconditioned sensor output ...
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Figure 12. MLX90308 Physical Characteristics, DF Package 0.51 0.33 10.50 10.10 3901090308 Rev 006 Programmable Sensor Interface 1. Notes: 1. All dimensions in millimeters. 2. Body dimensions do not include mold flash or protrusion, which ...
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Reliability Information This Melexis device is classified and qualified regarding soldering technology, solderability and moisture sen- sitivity level, as defined in this specification, according to following test methods: IPC/JEDEC J-STD-020 Moisture/Reflow Sensitivity Classification For Nonhermetic Solid State Surface Mount Devices ...
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Disclaimer Devices sold by Melexis are covered by the warranty and patent indemnification provisions ap- pearing in its Term of Sale. Melexis makes no warranty, express, statutory, implied descrip- tion regarding the information set forth herein or regarding ...