Overview
The LM50CIM3 is a precision integrated-circuit temperature sensor produced by Texas Instruments. It is designed to sense a wide temperature range of –40°C to 125°C using a single positive supply. The device is calibrated directly in degrees Celsius and features a linear output voltage that is proportional to temperature with a scale factor of 10 mV/°C and a DC offset of 500 mV. This allows for the reading of negative temperatures without the need for a negative supply. The LM50CIM3 is part of the LM50 and LM50-Q1 family, which includes versions qualified for automotive applications (AEC-Q100 Grade 1).
Key Specifications
| Parameter | Description |
|---|---|
| Package | SOT-23 (DBZ) |
| Operating Temperature Range | –40°C to 125°C |
| Scale Factor | 10 mV/°C |
| DC Offset | 500 mV |
| Accuracy at 25°C | ±2°C |
| Accuracy over Full Range | ±3°C to ±4°C |
| Supply Voltage | 4.5 V to 10 V |
| Current Drain | |
| Self-Heating | |
| Nonlinearity | |
| RoHS Status | RoHS Compliant |
Key Features
- Calibrated directly in degrees Celsius with a linear +10 mV/°C scale factor.
- Operates from a single positive supply voltage of 4.5 V to 10 V.
- Low current drain of less than 130 µA, minimizing self-heating to less than 0.2°C in still air.
- High accuracy with ±2°C specified at 25°C and ±3°C to ±4°C over the full temperature range.
- No external calibration or trimming required due to wafer-level trimming.
- Suitable for remote applications and features low self-heating.
- UL recognized component and AEC-Q100 Grade 1 qualified for automotive applications (LM50-Q1).
Applications
- Automotive systems
- Computers and computer peripherals
- Disk drives
- Battery management systems
- FAX machines and printers
- Portable medical instruments
- HVAC systems
- Power supply modules
Q & A
- What is the operating temperature range of the LM50CIM3?
The LM50CIM3 operates over a temperature range of –40°C to 125°C.
- What is the scale factor of the LM50CIM3?
The scale factor is 10 mV/°C.
- What is the DC offset of the LM50CIM3?
The DC offset is 500 mV.
- What is the accuracy of the LM50CIM3 at 25°C?
The accuracy at 25°C is ±2°C.
- What is the supply voltage range for the LM50CIM3?
The supply voltage range is 4.5 V to 10 V.
- How much current does the LM50CIM3 typically draw?
The current drain is less than 130 µA.
- Is the LM50CIM3 RoHS compliant?
- What are some common applications of the LM50CIM3?
- Does the LM50CIM3 require external calibration or trimming?
- Is the LM50CIM3 suitable for automotive applications?
