Overview
The LMT01DQXT, produced by Texas Instruments, is a high-accuracy, 2-pin digital output temperature sensor. This device is designed for precision temperature measurement and features a pulse count current loop interface, making it highly suitable for various applications in automotive, industrial, and consumer markets. The LMT01DQXT achieves a maximum ±0.5°C accuracy over a temperature range of –20°C to 90°C, with a fine resolution of 0.0625°C, all without the need for system calibration or hardware and software compensation.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Temperature Range | –50 | 150 | °C | |
| Accuracy (–20°C to 90°C) | ±0.5 | °C | ||
| Accuracy (90°C to 150°C) | ±0.625 | °C | ||
| Accuracy (–50°C to –20°C) | ±0.7 | °C | ||
| Resolution | 0.0625 | °C | ||
| Communication Frequency | 88 | kHz | ||
| Conversion Current | 34 | µA | ||
| Continuous Conversion Plus Data-Transmission Period | 100 | ms | ||
| Supply Voltage (VP – VN) | 2 | 5.5 | V | |
| Package Types | TO-92/LPG, WSON/DQX |
Key Features
- Precision Digital Temperature Measurement: Simplified in a compact 2-pin package with high accuracy over a wide temperature range.
- Pulse Count Current Loop Interface: Easily read by a processor, with the number of output pulses proportional to temperature.
- Integrated EMI Immunity: Ensures reliable operation in noisy environments.
- Flexible Supply Operation: Floating 2-V to 5.5-V (VP–VN) supply operation.
- Compact Packaging: Multiple 2-pin package offerings, including TO-92/LPG and WSON/DQX, which are smaller than traditional TO-92 packages.
- Easy Conversion to Two-Wire Probe: Can be converted into a two-wire temperature probe with a wire length up to two meters.
Applications
- Digital Output Wired Probes: Suitable for precise temperature measurement in various probe configurations.
- White Goods: Used in household appliances for temperature monitoring.
- HVAC Systems: Employed in heating, ventilation, and air conditioning systems for temperature control.
- Power Supplies: Utilized for temperature monitoring in power supply units.
- Battery Management: Applied in battery management systems to monitor temperature.
Q & A
- What is the temperature accuracy of the LMT01DQXT over the range of –20°C to 90°C?
The temperature accuracy is ±0.5°C over this range.
- What is the resolution of the LMT01DQXT temperature sensor?
The resolution is 0.0625°C.
- What is the communication frequency of the LMT01DQXT?
The communication frequency is 88 kHz.
- What is the typical conversion current of the LMT01DQXT?
The typical conversion current is 34 µA.
- What are the available package types for the LMT01DQXT?
The available package types are TO-92/LPG and WSON/DQX.
- Can the LMT01DQXT be used in noisy environments?
Yes, it has integrated EMI immunity, making it suitable for use in noisy environments.
- What is the maximum wire length for converting the LMT01DQXT into a two-wire temperature probe?
The maximum wire length is up to two meters.
- Is the LMT01DQXT suitable for automotive applications?
For automotive applications, the LMT01-Q1 version is recommended, which is the automotive-qualified version of the LMT01.
- What is the supply voltage range for the LMT01DQXT?
The supply voltage range is from 2 V to 5.5 V (VP – VN).
- How often does the LMT01DQXT perform temperature conversions and data transmission?
The LMT01DQXT performs continuous conversion plus data-transmission every 100 ms.
