FM75 Datasheet, PDF (1/15 Pages) Fairchild Semiconductor – Low Voltage 2-Wire Digital Temperature Sensor with Thermal Alarm

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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
Applications
• Battery Management
• FAX Management
• Printers
• Portable Medical Instruments
• HVAC
• Power Supply Modules
• Disk Drives
• Computers
• Automotive
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.
Application Diagram
2.7 to 5.5V
A0 ⁷
User
Programmable
A1
6
Address
A2 ⁵
SMBus _SDA ¹
Interface
SCL
2
8
FM75
8 Pin
Configuration
4
3 _O.S.
REV. 1.0.5 10/2/03