Overview
The LM50BIM3/NOPB is a precision integrated-circuit temperature sensor produced by Texas Instruments. This device is part of the LM50 series, which includes the LM50 and LM50-Q1 models. The LM50BIM3/NOPB is designed to sense temperatures in the range of –40°C to 125°C using a single positive supply voltage. It features a linear output voltage that is directly proportional to the temperature, with a scale factor of 10 mV/°C and a DC offset of 500 mV, allowing for the measurement of negative temperatures without a negative supply.
The device is calibrated directly in degrees Celsius and does not require any external calibration or trimming. It operates from a supply voltage of 4.5 V to 10 V and has a low quiescent current of less than 130 µA, which minimizes self-heating to less than 0.2°C in still air.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOT-23 (DBZ) | |
| Pins | 3 | |
| Operating Temperature Range | –40 to 125 | °C |
| Supply Voltage | 4.5 to 10 | V |
| Scale Factor | 10 mV/°C | |
| DC Offset | 500 mV | |
| Accuracy at 25°C | ±2°C | |
| Accuracy over –40°C to 125°C | ±4°C | |
| Quiescent Current | < 130 µA | |
| Self-Heating | < 0.2°C in still air | |
| Nonlinearity | < 0.8°C over temp |
Key Features
- Calibrated directly in degrees Celsius (centigrade)
- Linear +10 mV/°C scale factor
- ±2°C accuracy specified at 25°C
- Specified for full –40°C to 125°C temperature 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 air
- Nonlinearity less than 0.8°C over temperature
- UL recognized component
- LM50-Q1 is AEC-Q100 Grade 1 qualified and manufactured on an automotive grade flow
Applications
- Automotive
- Computers
- Disk drives
- Battery management
- FAX machines
- Printers
- Portable medical instruments
- HVAC (Heating, Ventilation, and Air Conditioning)
- Power supply modules
Q & A
- What is the operating temperature range of the LM50BIM3/NOPB?
The operating temperature range is –40°C to 125°C.
- What is the supply voltage range for the LM50BIM3/NOPB?
The supply voltage range is 4.5 V to 10 V.
- What is the scale factor of the LM50BIM3/NOPB?
The scale factor is 10 mV/°C.
- What is the DC offset of the LM50BIM3/NOPB?
The DC offset is 500 mV.
- What is the accuracy of the LM50BIM3/NOPB at 25°C?
The accuracy is ±2°C at 25°C.
- What is the quiescent current of the LM50BIM3/NOPB?
The quiescent current is less than 130 µA.
- How much self-heating does the LM50BIM3/NOPB experience?
The self-heating is less than 0.2°C in still air.
- Is the LM50BIM3/NOPB suitable for automotive applications?
Yes, the LM50-Q1 version is AEC-Q100 Grade 1 qualified and suitable for automotive applications.
- What are some common applications of the LM50BIM3/NOPB?
Common applications include automotive, computers, disk drives, battery management, FAX machines, printers, portable medical instruments, HVAC, and power supply modules.
- Does the LM50BIM3/NOPB require external calibration or trimming?
No, the LM50BIM3/NOPB does not require any external calibration or trimming due to wafer-level trimming and calibration.
