FM75M8X
FM75M8X Datasheet
FM75 Low-Voltage Two-Wire Digital Temperature Sensor with Thermal Alarm
| Part | Datasheet |
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FM75M8X |
FM75M8X (pdf) |
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FM75M8 |
FM75M8 |
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| FM75 Low-Voltage Two-Wire Digital Temperature Sensor with Thermal Alarm December 2006 FM75 tm Low-Voltage Two-Wire Digital Temperature Sensor with Thermal Alarm • User Configurable to 9, 10, 11 or 12-bit Resolution • Precision Calibrated to ±1°C, 0°C to 100°C Typical • Temperature Range -40°C to 125°C • Low Operating Current less than 250µA • Low Self Heating 0.2°C max. in still air • Operating Voltage Range 2.7V to 5.5V • Battery Management • FAX Management • Printers • Portable Medical Instruments • HVAC Systems • Power Supply Modules • Disk Drives • Computers • Automotive Components The FM75 contains a high-precision CMOS temperature sensor, a Delta-Sigma analog-to-digital converter, and a SMBus-compatible serial digital interface. Typical accuracy is ±2°C over the full temperature range of 40°C to 125°C and to ±1°C over the range of 0°C to 100°C, with 9- to 12-bit resolution default is Thermal alarm output, over-limit signal OS supports interrupt and comparator modes. OS is active if the userprogrammable trip-temperature is exceeded. When the temperature falls below the trip temperature, plus the user-programmable hysteresis limit, the OS is disabled. Available in a surface mount SOIC-8 SOP-8 package. Application Diagram to 5.5V User Programmable Address SMBus SDA 1 Interface FM75 8-Pin Configuration Figure Typical Application Diagram Ordering Information Part Number FM75M8x Package 8-Lead SOIC Temperature Range -40°C to +125°C Packing Method 2500 Units, Tape and Reel FM75 Low-Voltage Two-Wire Digital Temperature Sensor with Thermal Alarm Pin Assignments FM75 Pin Descriptions Pin # 1 2 3 Name SDA SCL OS 4 5, 6, 7 GND A0, A1, A2 Figure Pin Assignments Direction Input/Output Input Output Supply Input Supply Serial Data. Open drain to I/O-data pin for two-wire interface. Serial Clock. Clock for two-wire serial interface. Over-Limit Signal. Open drain thermostat output that indicates if the temperature exceeds user-programmable limits. Default is active LOW. Ground Address Least Significant Bits LSBs . User selectable address pins for the three LSBs of the serial interface address. Supply Voltage 2006 Fairchild Semiconductor Corporation FM75 Low-Voltage Two-Wire Digital Temperature Sensor with Thermal Alarm Absolute Maximum Ratings The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table defines the conditions for actual device operation. Parameter Supply Voltage Output Voltage Output Current Storage Temperature Range Lead Soldering Temperature ESD 1 Human Body Model Machine Model Min. -60 Typ. Max. +7 VCC + 10 +150 220 Units V mA °C °C 2000 Note Human Body Model 100pF capacitor discharged through a 1.5kΩ resistor into each pin. Machine Model 200pF capacitor discharged directly into each pin. Electrical Characteristics 2 -40°C ð TA ð +125°C, VCC = 5.0V unless otherwise noted. Specifications are subject to change without notice. Symbol Parameter Conditions Min. Typ. Max. Units TMIN, TMAX Specified Temperature Range Temperature Conversion Time 3 |
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