FM51

FM51 Low Voltage High Drive Temperature Sensor April 2001 FM51 Low Voltage High Drive Temperature Sensor 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. The FM51 does not require external calibration. Factory calibration of the FM51 is performed using a low-cost trimming technique. The FM51 is available in 3-pin SOT-23 surface mount packages. Features I Precision Calibrated to ±1°C (Typical) I Temperature Range: -40°C to 125°C I Extremely Linear Output Ramp (10mV/°C) I Low Output Impedance for 1mA Load I Output Ramp is Calibrated in Degrees Celsius I Low Operating Current <130µA (no load) I Low Self Heating (0.2°C Max in Still Air) I Operating Voltage Range: +2.7V to +6.0V I Uses a Single Positive Supply I Non-linearity ≤ 0.8°C Applications I Computers I Battery Management I FAX Machines/Printers/Copiers I Portable Medical Instruments I HVAC I Power Supply Modules I Disk Drives I Automotive Control Circuits Typical Applications 5V FM51 U1 1µF VTEMP 100K 10K 3.9K IN REF 1.75V Serial Anal...