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MLX90308CCC Datasheet(PDF) 7 Page - Micro Electronics |
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MLX90308CCC Datasheet(HTML) 7 Page - Micro Electronics |
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7 / 26 page  MLX902xx Name of Sensor Rev Y.X 22/Aug/98 Page 7 MLX90308CCC Programmable Sensor Interface MLX90308CCC Programmable Sensor Interface Page 7 Rev 2.2 23/Oct/01 Table 2. Absolute Maximum Ratings Supply voltage (ratiometric) VDD Max 6V Supply voltage (ratiometric) VDD Min 4.5V Supply voltage (operating), VDD1 Max 35V Reverse voltage protection -0.7V Supply current, Current Mode, IDD 3.5mA Supply current, Voltage Mode, IDD 4.5mA Output current, IVMO 8mA Output current (short to VDD), ISCVMO 100mA Output current (short to VSS), ISCVMO 8mA Output voltage, VVMO +11V Power dissipation, PD 71mW Operating temperature range, TA -40 to +140° Storage temperature range, TS -55 to +150°C Maximum junction temperature, TJ 150°C 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 to create the sensor system. Programming the EEPROM involves some minimal communications interface circuitry, Melexis’ setup software, and a PC. The communications interface circuitry is available in a development board. This circuitry communicates with the PC via a standard RS- 232 serial communications port. Cross Reference There are no known devices which the MLX 90308CCC can replace. ESD Precautions Observe standard ESD control procedures for CMOS semiconductors. |
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