Overview
The TMP101NA/3KG4 is a digital temperature sensor produced by Texas Instruments. It is designed for thermal management and thermal protection applications, offering high accuracy and reliability over a wide temperature range. The device is compatible with SMBus, Two-Wire, and I2C interfaces, making it versatile for various communication needs. The TMP101NA/3KG4 is available in a 6-Pin SOT-23 package and operates over a temperature range of –55°C to 125°C, with a typical accuracy of ±1°C and a maximum accuracy of ±2°C within this range.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Temperature Range | –55 | 125 | °C | |
| Supply Voltage Range | 2.7 | 5.5 | V | |
| Quiescent Current (Serial Bus Inactive) | 45 | 75 | μA | |
| Quiescent Current (Serial Bus Active, SCL = 400 kHz) | 70 | 150 | μA | |
| Shutdown Current | 0.1 | 13 | μA | |
| Temperature Accuracy (–25°C to 85°C) | ±0.5 | ±2 | °C | |
| Temperature Accuracy (–55°C to 125°C) | ±1 | ±2 | °C | |
| Resolution Selectable | 9 bits | 12 bits | ||
| Conversion Time (12-bit resolution) | 320 | 600 | ms |
Key Features
- High Accuracy: Typical accuracy of ±1°C and maximum accuracy of ±2°C over the operating temperature range.
- Low Quiescent Current: 45-μA in quiescent mode and 0.1-μA in shutdown mode.
- Wide Supply Range: Operates from 2.7 V to 5.5 V.
- Interface Compatibility: Compatible with SMBus, Two-Wire, and I2C interfaces.
- Alert Function: Features an overtemperature alert with an open-drain output requiring a pull-up resistor.
- Selectable Resolution: Offers 9-bit to 12-bit resolution, with a minimum resolution of 0.0625°C.
- One-Shot Temperature Measurement Mode: Allows for single temperature conversion in shutdown mode to reduce power consumption.
- Thermostat Mode: Operates in Comparator Mode or Interrupt Mode for temperature monitoring.
Applications
- Power-Supply Temperature Monitoring: Ideal for monitoring temperatures in power supply units.
- Computer Peripheral Thermal Protection: Used in notebook computers, cell phones, and other consumer electronics for thermal protection.
- Battery Management: Suitable for temperature monitoring in battery management systems.
- Office Machines and Environmental Monitoring: Applied in office machines, HVAC systems, and environmental monitoring devices.
- Industrial and Instrumentation Applications: Used in various industrial and instrumentation applications requiring precise temperature measurement.
Q & A
- What is the operating temperature range of the TMP101NA/3KG4?
The TMP101NA/3KG4 operates over a temperature range of –55°C to 125°C.
- What is the typical accuracy of the TMP101NA/3KG4?
The typical accuracy is ±1°C, with a maximum accuracy of ±2°C over the operating temperature range.
- What interfaces is the TMP101NA/3KG4 compatible with?
The device is compatible with SMBus, Two-Wire, and I2C interfaces.
- What is the supply voltage range for the TMP101NA/3KG4?
The device operates from 2.7 V to 5.5 V.
- Does the TMP101NA/3KG4 have an alert function?
Yes, it features an overtemperature alert with an open-drain output requiring a pull-up resistor.
- What are the selectable resolutions for the TMP101NA/3KG4?
The device offers selectable resolutions from 9 bits to 12 bits, with a minimum resolution of 0.0625°C.
- How does the one-shot temperature measurement mode work?
This mode allows for a single temperature conversion in shutdown mode to reduce power consumption. Writing 1 to the OS/ALERT bit starts a single temperature conversion, and the device returns to the shutdown state after completion.
- What are the thermostat modes available for the TMP101NA/3KG4?
The device operates in Comparator Mode or Interrupt Mode for temperature monitoring. In Comparator Mode, the ALERT pin is activated when the temperature equals or exceeds the THIGH value and remains active until it falls below the TLOW value. In Interrupt Mode, the ALERT pin is activated when the temperature exceeds THIGH or goes below TLOW, and it is cleared when the host controller reads the temperature register.
- What is the quiescent current of the TMP101NA/3KG4?
The quiescent current is 45 μA in quiescent mode and 0.1 μA in shutdown mode.
- What are some common applications of the TMP101NA/3KG4?
The device is used in power-supply temperature monitoring, computer peripheral thermal protection, battery management, office machines, environmental monitoring, and various industrial and instrumentation applications.
