1FEATURES

2• Calibrated Directly in ° Celsius (Centigrade)

• Linear + 10.0 mV/°C Scale Factor

• ±3°C Accuracy Guaranteed

• Rated for Full −20° to +100°C Range

• Suitable for Remote Applications

• Low Cost Due to Wafer-Llevel Trimming

• Operates from 4.0V to 10V

• Less than 120 μA Current Drain

• Low Self-Heating, 0.20°C in Still Air

• Nonlinearity Only ±0.8°C Max Over Temp

• Low Impedance Output, 20Ω for 1 mA Load

APPLICATIONS

• Battery Management

• FAX Machines

• Printers

• Portable Medical Instruments

• HVAC

• Power Supply Modules

• Disk Drives

• Computers

• Automotive

DESCRIPTION

The LM45 series are precision integrated-circuit

temperature sensors, whose output voltage is linearly

proportional to the Celsius (Centigrade) temperature.

The LM45 does not require any external calibration or

trimming to provide accuracies of ±2°C at room

temperature and ±3°C over a full −20 to +100°C temperature range. Low cost is assured by trimming

and calibration at the wafer level. The LM45's low

output impedance, linear output, and precise inherent

calibration make interfacing to readout or control

circuitry especially easy. It can be used with a single

power supply, or with plus and minus supplies. As it

draws only 120 μA from its supply, it has very low

self-heating, less than 0.2°C in still air. The LM45 is

rated to operate over a −20° to +100°C temperature

range.