General Description
The FM51 is a high-precision CMOS temperature sensor that provides a cost-effective solution for applications requiring highaccuracy temperature monitoring. The FM51 is ideally suited for applications requiring high drive current. The FM51 output voltage ramp is extremely linear and has a slope of 10mV/°C. It is typically accurate to ±1°C over a temperature range of -40°C to 125°C and has a typical room temperature accuracy of ±0.5°C. The output voltage characteristic for the FM51 is illustrated in Figure 1.

FEATUREs
■ Precision Calibrated to ±1°C (Typical)
■ Temperature Range: -40°C to 125°C
■ Extremely Linear Output Ramp (10mV/°C)
■ Low Output Impedance for 1mA Load
■ Output Ramp is Calibrated in Degrees Celsius
■ Low Operating Current <130µA (no load)
■ Low Self Heating (0.2°C Max in Still Air)
■ Operating Voltage Range: +2.7V to +6.0V
■ Uses a Single Positive Supply
■ Non-linearity ≤ 0.8°C

APPLICATIONs
■ Computers
■ Battery Management
■ FAX Machines/Printers/Copiers
■ Portable Medical Instruments
■ HVAC
■ Power Supply Modules
■ Disk Drives
■ Automotive Control Circuits