FM75

www.fairchildsemi.com FM75 Low Voltage 2-Wire Digital Temperature Sensor with Thermal Alarm Features User Configurable to 9, 10, 11 or 12-bit Resolution Precision Calibrated to ±1°C from 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 Description Within the FM75 are: 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 resolution is 9 bits. Thermal Alarm output, OS (Over-limit Signal) supports Interrupt and Comparator modes. OS is active, if the user-programmable trip-temperature is exceeded. When the temperature falls below the trip-temperature plus the user-programmable hysteresis limit, OS is disabled. Available packages are surface mount SOIC-8 (SOP-8) and MSOP-8. Applications Battery Management FAX Management Printers Portable Medical Instruments HVAC Power Supply Modules Disk Drives Computers Automotive Application Diagram 2.7 to 5.5V 8 A0 User Programmable Address 7 6 5 A1 A2 FM75 8 Pin Configuration 3 O.S. SMBus Interface SDA SCL 1 2 4 REV. 1.0.4 10/3/02 FM75 PRODUCT SPECIFICATION Pin Assignments SDA SCL O.S. GND 1 8 VDD A0 A1 A2 2 7 FM75 3 6 4 5 Pin Descripti...