Overview
The LMT01DQXR from Texas Instruments is a high-accuracy, 2-pin digital output temperature sensor designed for a wide range of applications. It features a pulse count current loop interface, which simplifies hardware implementation and allows for easy integration with microcontrollers (MCUs) without the need for system calibration or hardware and software compensation. The sensor offers high accuracy over a broad temperature range, making it suitable for onboard and offboard temperature sensing in automotive, industrial, and consumer markets.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Temperature Range | –50°C to 150°C | °C |
| Accuracy (–20°C to 90°C) | ±0.5°C (Maximum) | °C |
| Accuracy (90°C to 150°C) | ±0.625°C (Maximum) | °C |
| Accuracy (–50°C to –20°C) | ±0.7°C (Maximum) | °C |
| Resolution | 0.0625°C | °C |
| Communication Frequency | 88 kHz | kHz |
| Conversion Current | 34 µA | µA |
| Continuous Conversion Plus Data-Transmission Period | 100 ms | ms |
| Supply Voltage Range | 2 V to 5.5 V (VP–VN) | V |
| Package Type | WSON (1.7x2.5 mm), TO-92/LPG (3.1 mm × 4 mm × 1.5 mm) | - |
Key Features
- Precision digital temperature measurement with high accuracy over a wide temperature range.
- Pulse count current loop interface that is easily read by a processor, with the number of output pulses proportional to temperature.
- Simple 2-pin architecture with integrated EMI suppression, making it suitable for onboard and offboard temperature sensing in noisy environments.
- Floating 2-V to 5.5-V supply operation with integrated EMI immunity.
- Multiple package offerings, including WSON and TO-92/LPG, which are smaller than traditional TO-92 packages.
- Can be easily converted into a two-wire temperature probe with a wire length up to two meters.
Applications
- Digital output wired probes.
- White goods.
- HVAC (Heating, Ventilation, and Air Conditioning) systems.
- Power supplies.
- Battery management systems.
- Automotive, industrial, and consumer markets.
Q & A
- What is the temperature range of the LMT01DQXR?
The LMT01DQXR operates over a temperature range of –50°C to 150°C.
- What is the accuracy of the LMT01DQXR in the –20°C to 90°C range?
The accuracy is ±0.5°C (Maximum) in the –20°C to 90°C range.
- How does the LMT01DQXR communicate temperature data?
The LMT01DQXR uses a pulse count current loop interface, where the number of output pulses is proportional to the temperature.
- What is the resolution of the temperature measurements provided by the LMT01DQXR?
The resolution is 0.0625°C.
- What is the communication frequency of the LMT01DQXR?
The communication frequency is 88 kHz.
- What is the conversion current of the LMT01DQXR?
The conversion current is 34 µA.
- How often does the LMT01DQXR transmit data?
The LMT01DQXR continuously converts and transmits data approximately every 100 ms.
- What is the supply voltage range for the LMT01DQXR?
The supply voltage range is 2 V to 5.5 V (VP–VN).
- What package types are available for the LMT01DQXR?
The LMT01DQXR is available in WSON (1.7x2.5 mm) and TO-92/LPG (3.1 mm × 4 mm × 1.5 mm) packages.
- Can the LMT01DQXR be used in noisy environments?
Yes, the LMT01DQXR has integrated EMI suppression, making it suitable for use in noisy environments.
