Overview
The TMP451-Q1 device, produced by Texas Instruments, is a high-accuracy, low-power remote temperature sensor monitor with a built-in local temperature sensor. It is designed for multi-location, high-accuracy temperature measurements and is particularly suited for various automotive sub-systems. The device operates over a supply voltage range of 1.7 V to 3.6 V and a temperature range of –40°C to 125°C, making it AEC-Q100 qualified for automotive applications.
Key Specifications
| Specification | Value |
|---|---|
| Supply and Logic Voltage Range | 1.7 V to 3.6 V |
| Operating Current | 27 µA |
| Shutdown Current | 3 µA |
| Temperature Accuracy (Local and Remote) | ±1°C (maximum) |
| Temperature Resolution (Local and Remote) | 0.0625°C (12-bit digital code) |
| Operating Temperature Range | –40°C to 125°C |
| Package Type | 8-pin WSON (WDFN) packages (2.50-mm × 2.50-mm with Wettable Flanks, 2.00-mm × 2.00-mm) |
| Serial Interface | Two-wire and SMBus™ |
| Series Resistance Cancellation | Up to 1 kΩ |
| η-Factor and Offset Correction | Programmable |
| Digital Filter | Programmable |
| Diode Fault Detection | Available |
Key Features
- High-accuracy temperature measurements with ±1°C accuracy for both local and remote diode sensors.
- Low-power operation with 27 µA operating current and 3 µA shutdown current.
- Series resistance cancellation up to 1 kΩ to eliminate additional characterization and temperature offset correction.
- Programmable nonideality factor (η-factor), programmable offset, and programmable temperature limits.
- Programmable digital filter to enhance noise immunity.
- Diode fault detection for robust monitoring.
- Two-wire and SMBus™ serial interface for flexible communication.
- Available in 8-pin WSON (WDFN) packages with Wettable Flanks for improved solderability and reduced automatic visual inspection (AVI) time.
Applications
- Automotive infotainment systems.
- ECU (Engine Control Unit) processor temperature monitoring.
- TCM (Transmission Control Module) processor temperature monitoring.
- BCM (Body Control Module) processor temperature monitoring.
- LED headlight thermal control.
- General temperature monitoring in various automotive sub-systems.
Q & A
- What is the operating temperature range of the TMP451-Q1?
The TMP451-Q1 operates over a temperature range of –40°C to 125°C.
- What is the supply voltage range for the TMP451-Q1?
The supply voltage range is 1.7 V to 3.6 V.
- What is the accuracy of the temperature measurements for the TMP451-Q1?
The temperature accuracy is ±1°C (maximum) for both local and remote diode sensors.
- What is the resolution of the temperature measurements for the TMP451-Q1?
The resolution is 0.0625°C, represented as a 12-bit digital code.
- Does the TMP451-Q1 support series resistance cancellation?
- What types of serial interfaces does the TMP451-Q1 support?
The TMP451-Q1 supports two-wire and SMBus™ serial interfaces.
- Is the TMP451-Q1 qualified for automotive applications?
- What package types are available for the TMP451-Q1?
The TMP451-Q1 is available in 8-pin WSON (WDFN) packages with dimensions of 2.50-mm × 2.50-mm and 2.00-mm × 2.00-mm.
- Does the TMP451-Q1 have diode fault detection?
- What is the purpose of the programmable digital filter in the TMP451-Q1?
The programmable digital filter enhances noise immunity and improves the accuracy of temperature measurements.
