Overview
The TMP461AIRUNT from Texas Instruments is a high-accuracy, low-power remote and local temperature sensor. This device integrates both local and remote temperature measurement channels in a single 10-lead WQFN package. It is designed for multi-location, high-accuracy temperature measurements and is compatible with the SMBus communication protocol, featuring up to nine different pin-programmable addresses. The TMP461 is ideal for various applications including communication, computing, instrumentation, and industrial environments, operating over a supply voltage range of 1.7 V to 3.6 V and a temperature range of –40°C to 125°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 1.7 to 3.6 | V |
| Operating Temperature Range | –40 to 125 | °C |
| Local Temperature Sensor Accuracy | ±1°C (–10°C to 100°C), ±1.25°C (–40°C to 125°C) | °C |
| Remote Temperature Sensor Accuracy | ±0.75°C (0°C to 100°C), ±1.5°C (–40°C to 125°C) | °C |
| Temperature Resolution | 0.0625°C | °C |
| ADC Resolution | 12 bits | |
| Operating Current | 35 µA (1 SPS), 3 µA (shutdown) | µA |
| Package Type | 10-Lead WQFN | |
| Serial Interface | Two-wire and SMBus™ compatible |
Key Features
- Series Resistance Cancellation
- Programmable nonideality factor (η-factor) and offset correction
- Programmable digital filter
- Diode fault detection
- Pin-programmable bus address with up to nine different addresses
- High accuracy with a resolution of 0.0625°C for both local and remote sensors
- Low power consumption with 35 µA operating current and 3 µA shutdown current
Applications
- Processor temperature monitoring
- Telecommunication equipment
- Servers and personal computers
- Precision instruments
- Test equipment
- Smart batteries
- Embedded applications
- LED lighting thermal control
Q & A
- What is the operating temperature range of the TMP461?
The TMP461 operates over a temperature range of –40°C to 125°C.
- What is the resolution of the temperature measurements for the TMP461?
The temperature resolution for both local and remote sensors is 0.0625°C.
- What communication protocol does the TMP461 support?
The TMP461 supports the SMBus communication protocol with up to nine different pin-programmable addresses.
- What is the supply voltage range for the TMP461?
The supply voltage range for the TMP461 is 1.7 V to 3.6 V.
- Does the TMP461 have built-in fault detection?
Yes, the TMP461 includes diode fault detection.
- What is the package type of the TMP461?
The TMP461 comes in a 10-lead WQFN package.
- What are some of the key applications for the TMP461?
The TMP461 is used in various applications including processor temperature monitoring, telecommunication equipment, servers, precision instruments, test equipment, smart batteries, embedded applications, and LED lighting thermal control.
- How accurate is the local temperature sensor of the TMP461?
The local temperature sensor accuracy is ±1°C (–10°C to 100°C) and ±1.25°C (–40°C to 125°C).
- What is the operating current of the TMP461 in active and shutdown modes?
The operating current is 35 µA (1 SPS) in active mode and 3 µA in shutdown mode.
- Can the TMP461 be programmed for different temperature limits?
Yes, the TMP461 allows for programmable temperature limits.
