Overview
The LM35DT is a precision integrated-circuit temperature sensor produced by Texas Instruments. It is part of the LM35 series, which is known for its high accuracy and linear output voltage that is directly proportional to the Centigrade temperature. This device does not require external calibration or trimming, making it a convenient and cost-effective solution for temperature measurement. The LM35DT operates within a temperature range of 0°C to 100°C and is suitable for various applications due to its low self-heating, low current drain, and low-output impedance.
Key Specifications
| Attribute | Value |
|---|---|
| Brand | Texas Instruments |
| Sensor Function | Temperature |
| Output Type | Voltage |
| Interface Type | Analog |
| Accuracy | ±0.5°C (at 25°C), ±0.6°C (over full range) |
| Mounting Type | Through Hole |
| Pin Count | 3 |
| Operating Temperature Range | 0°C to +100°C |
| Minimum Operating Supply Voltage | 4 V |
| Maximum Operating Supply Voltage | 30 V |
| Package Type | TO-220 |
| Sensor Gain | 10 mV/°C |
| Supply Current | Less than 60 μA |
| Self-Heating | Less than 0.1°C in still air |
| Output Impedance | 0.1 Ω for 1-mA load |
Key Features
- Calibrated directly in Celsius (Centigrade) with a linear +10-mV/°C scale factor.
- High accuracy: ±0.5°C at 25°C and ±0.6°C over the full temperature range.
- Operates from 4 V to 30 V supply voltage.
- Low current drain: less than 60 μA.
- Low self-heating: less than 0.1°C in still air.
- Non-linearity: only ±¼°C typical.
- Low-output impedance: 0.1 Ω for 1-mA load.
- Suitable for remote applications due to its low power consumption and high accuracy.
Applications
- Power supplies: for temperature monitoring and control.
- Battery management: to monitor battery temperature.
- HVAC (Heating, Ventilation, and Air Conditioning): for temperature control and monitoring.
- Appliances: in various household and industrial appliances for temperature sensing.
- Remote sensing: due to its low power consumption and high accuracy.
Q & A
- What is the operating temperature range of the LM35DT?
The LM35DT operates within a temperature range of 0°C to 100°C.
- What is the accuracy of the LM35DT at 25°C?
The accuracy at 25°C is ±0.5°C.
- What is the supply voltage range for the LM35DT?
The supply voltage range is from 4 V to 30 V.
- How much current does the LM35DT typically draw?
The LM35DT draws less than 60 μA from the supply.
- What is the sensor gain of the LM35DT?
The sensor gain is 10 mV/°C.
- What is the package type of the LM35DT?
The package type is TO-220.
- Is the LM35DT suitable for remote applications?
- What are some common applications of the LM35DT?
- Does the LM35DT require external calibration or trimming?
- What is the output impedance of the LM35DT?
The output impedance is 0.1 Ω for a 1-mA load.
