Overview
The LMT70YFQR is a precision analog output temperature sensor produced by Texas Instruments. It is designed to provide high accuracy and low power consumption, making it suitable for a wide range of applications where precise temperature sensing is critical. The sensor features an output enable pin, allowing multiple LMT70 devices to share a single ADC channel, which simplifies system design and reduces overall system cost. The LMT70YFQR operates over a wide temperature range from -55°C to 150°C, making it versatile for various environments.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Temperature Range | -55 | 150 | °C | |
| Supply Voltage | 2.0 | 5.5 | V | |
| Temperature Accuracy (20°C to 42°C) | -0.13 | ±0.05 | 0.13 | °C |
| Temperature Accuracy (-20°C to 90°C) | -0.2 | 0.2 | °C | |
| Temperature Accuracy (90°C to 110°C) | -0.23 | 0.23 | °C | |
| Output Voltage Change with Load Current | -0.4 | 0.4 | mV | |
| Output Resistance | 28 | 80 | Ω | |
| Output Load Capacitance | 1100 | pF | ||
| Operating Current | 0.012 | mA |
Key Features
- Precision Analog Output: The LMT70YFQR provides a high-precision analog voltage output, with a resolution of 5.194 mV/°C.
- Wide Temperature Range: Operates from -55°C to 150°C, making it suitable for a variety of applications.
- Output Enable Pin: Allows multiple devices to share a single ADC channel, simplifying system design and reducing cost.
- Low Power Consumption: Designed for low power operation, making it ideal for battery-powered devices and IoT applications.
- Matching Capability: The LMT70A version offers matching of two adjacent units on tape and reel, with a maximum mismatch of 0.1°C at 30°C.
- Shutdown Mode: Features a shutdown mode controlled by the output enable pin, which helps in power management.
Applications
- Internet of Things (IoT) Sensor Nodes: Ideal for precision temperature sensing in IoT devices.
- Medical Thermometers and Equipment: Suitable for high-precision medical applications, including human body temperature monitoring.
- High-Precision Instrumentation: Used in various industrial and scientific instruments requiring accurate temperature measurements.
- Battery-Powered Devices: Low power consumption makes it suitable for battery-powered devices.
- Metering and Temperature Compensation: Can be used for temperature compensation in metering applications.
Q & A
- What is the operating temperature range of the LMT70YFQR?
The LMT70YFQR operates from -55°C to 150°C.
- What is the typical accuracy of the LMT70YFQR at 20°C to 42°C?
The typical accuracy is ±0.05°C.
- How does the output enable pin function?
The output enable pin allows multiple LMT70 devices to share a single ADC channel, simplifying system design and reducing cost.
- What is the resolution of the analog output?
The resolution is 5.194 mV/°C.
- Is the LMT70YFQR suitable for medical applications?
Yes, it is suitable for high-precision medical applications, including human body temperature monitoring.
- What is the maximum operating current of the LMT70YFQR?
The maximum operating current is 0.012 mA.
- Does the LMT70YFQR have a shutdown mode?
Yes, it features a shutdown mode controlled by the output enable pin.
- Can the LMT70YFQR be used in IoT applications?
Yes, it is ideal for precision temperature sensing in IoT sensor nodes.
- What is the output resistance of the LMT70YFQR?
The output resistance is between 28 Ω and 80 Ω.
- Is the LMT70YFQR RoHS compliant?
Yes, the LMT70YFQR is RoHS compliant.
