深圳市中立信电子科技有限公司

1 Features

1• LM50-Q1 is AEC-Q100 Grade 1 Qualified and is

Manufactured on an Automotive Grade Flow

• Calibrated Directly in Degrees Celsius

(Centigrade)

• Linear + 10 mV/°C Scale Factor

• ±2°C Accuracy Specified at 25°C

• Specified for Full –40° to 125°C Range

• Suitable for Remote Applications

• Low Cost Due to Wafer-Level Trimming

• Operates From 4.5 V to 10 V

• Less Than 130-μA Current Drain

• Low Self-Heating: Less Than 0.2°C in Still A

• Nonlinearity Less Than 0.8°C Over Temp

• UL Recognized Component

2 Applications

• Automotive

• Computers

• Disk Drives

• Battery Management

• FAX Machines

• Printers

• Portable Medical Instruments

• HVAC

• Power Supply Modules

3 Description The LM50 and LM50-Q1 devices are precision integrated-circuit temperature sensors that can sense a –40°C to 125°C temperature range using a single positive supply. The output voltage of the device is linearly proportional to temperature (10 mV/°C) and has a DC offset of 500 mV. The offset allows reading negative temperatures without the need for a negative supply. The ideal output voltage of the LM50 or LM50-Q1 ranges from 100 mV to 1.75 V for a –40°C to 125°C temperature range. The LM50 and LM50-Q1 do not require any external calibration or trimming to provide accuracies of ±3°C at room temperature and ±4°C over the full –40°C to 125°C temperature range. Trimming and calibration of the LM50 and LM50-Q1 at the wafer level assure low cost and high accuracy. The linear output, 500 mV offset, and factory calibration of the LM50 and LM50-Q1 simplify the circuitry requirements in a single supply environment where reading negative temperatures is necessary. Because the quiescent current of the LM50 and LM50-Q1 is less than 130 μA, self-heating is limited to a very low 0.2°C in still air