TMP411 - ±1°C Remote & Local Temp Sensor | Texas Instruments
MPN: TMP411 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.5 | $1.50 |
| 10 | $1.35 | $13.50 |
| 100 | $1.2 | $120.00 |
| 500 | $1.1 | $550.00 |
| 1,000 | $1 | $1,000.00 |
TMP411 Overview
A temperature sensor is a device that measures temperature and converts it into an electrical signal. The TMP411 is a digital temperature sensor, which means it outputs temperature readings in a digital format over a serial interface, making it easy to interface with microcontrollers and digital systems. It falls under the category of temperature sensors, which are part of the broader sensor family used in various electronic systems for monitoring and control.
Key features of the TMP411 include N-factor and series resistance correction, which improve remote sensing accuracy by compensating for non-idealities in the remote diode. It also features programmable temperature limits and an SMBus-compatible interface. The device operates from a supply voltage of 2.7V to 5.5V and has a resolution of 11 bits for both local and remote channels.
The TMP411 uses a delta-sigma ADC to convert the analog temperature signals to digital. It includes multiple registers for configuration and temperature data storage. The N-factor correction allows the device to be used with a wide variety of remote diodes, while series resistance correction compensates for resistance in the PCB traces, ensuring accurate readings even with long traces.
Typical applications include system thermal management in computers, servers, and industrial equipment, as well as environmental monitoring and battery management. The TMP411 is ideal for applications where accurate remote temperature sensing is required, such as monitoring the temperature of CPUs, GPUs, or other hot components.
When designing with the TMP411, ensure proper PCB layout to minimize noise on the remote sensing lines. Use a filter capacitor on the D+ and D- lines to reduce noise. Also, consider the supply voltage and ensure it is within the specified range for reliable operation.
Drop-in alternatives for TMP411 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TMP411 (same form factor and footprint) — differing in Interface, Local Temperature Accuracy, N-Factor Correction, Remote Temperature Accuracy, Resolution.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TMP411-Q1
✅ Drop-In✓ In Stock
$1.1 / Unit
View Datasheet →TMP411D
✅ Drop-In📋 Reference alternative (not in catalog)
TMP451
✅ Drop-In📋 Reference alternative (not in catalog)
TMP431
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ADT7461
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LM95234
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TMP411 Maximum Ratings & Electrical Characteristics
| Local Temperature Accuracy | ±1°C (TMP411), ±0.8°C (TMP411D) |
| Remote Temperature Accuracy | ±1°C (TMP411), ±0.8°C (TMP411D) |
| Temperature Range | -40°C to 125°C |
| Resolution | 11 bits |
| Interface | Two-wire, SMBus compatible |
| Supply Voltage | 2.7V to 5.5V |
| Package Options | VSSOP-8, SOIC-8, SOT23-8 |
| N-Factor Correction | Yes |
| Series Resistance Correction | Yes |
| Number of Channels | 2 (local + remote) |
| Operating Temperature Range | -40°C to 125°C |
| RoHS Status | Compliant |
| Mounting Type | Surface Mount |
| Output Type | Digital |
| Sensor Type | Local/Remote |
TMP411 Pin Configuration
| Pin 1 | D+ — Remote temperature sensor positive input |
| Pin 2 | D- — Remote temperature sensor negative input |
| Pin 3 | GND — Ground |
| Pin 4 | SDA — Serial data line (SMBus) |
| Pin 5 | SCL — Serial clock line (SMBus) |
| Pin 6 | ALERT — Alert output (open-drain) |
| Pin 7 | V+ — Power supply (2.7V to 5.5V) |
| Pin 8 | NC — No connect |
Typical Applications
TMP411 is suitable for 6 applications: CPU/GPU Thermal Monitoring, Industrial Equipment Monitoring, Battery Management Systems, Environmental Monitoring, Medical Equipment, Automotive Climate Control.
CPU/GPU Thermal Monitoring
The TMP411 is ideal for monitoring CPU and GPU temperatures in computers and servers. Its remote sensing capability uses the diode-connected transistor inside the processor to measure die temperature accurately. With ±1°C accuracy and N-factor correction, it ensures reliable thermal management. The SMBus interface allows easy integration with system management controllers. The TMP411's series resistance correction compensates for PCB trace resistance, ensuring accurate readings even with long traces. This makes it a preferred choice for high-performance computing systems where thermal throttling is critical.
Recommended
Industrial Equipment Monitoring
In industrial automation, the TMP411 monitors temperatures of motors, power supplies, and control cabinets. Its wide operating range of -40°C to 125°C suits harsh environments. The device's two-wire interface simplifies wiring in distributed systems. The TMP411's accuracy and correction features ensure reliable operation in noisy industrial settings. It can be used to trigger alarms or shutdowns when temperatures exceed safe limits, preventing equipment damage. The small SOIC-8 package fits compact designs, and the low power consumption makes it suitable for battery-powered sensors.
Recommended
Battery Management Systems
The TMP411 monitors battery pack temperatures in electric vehicles and portable electronics. Its remote sensing can measure the temperature of individual cells using diode-connected transistors. The device's accuracy helps prevent overheating and extends battery life. The SMBus interface allows communication with the battery management controller. The TMP411's low supply voltage range (2.7V to 5.5V) is compatible with battery voltages. Its small package and low power consumption make it ideal for space-constrained designs.
Recommended
Environmental Monitoring
The TMP411 can be used in environmental monitoring systems to measure ambient temperature. Its local sensor provides accurate readings, while the remote sensor can monitor external temperatures. The device's digital output simplifies data logging and analysis. The TMP411's accuracy and wide temperature range make it suitable for weather stations and HVAC systems. The two-wire interface allows multiple sensors to be connected on the same bus. The low power consumption is beneficial for battery-powered environmental sensors.
Recommended
Medical Equipment
The TMP411 is used in medical devices for temperature monitoring, such as incubators and diagnostic equipment. Its accuracy and reliability are critical for patient safety. The remote sensing capability allows non-invasive temperature measurement. The device's small package and low power consumption are suitable for portable medical devices. The SMBus interface enables integration with microcontrollers for data processing. The TMP411's wide temperature range covers clinical requirements.
Recommended
Automotive Climate Control
The TMP411 monitors cabin and engine temperatures in vehicles. The TMP411-Q1 variant is AEC-Q100 qualified for automotive use. Its remote sensing can measure temperatures in hard-to-reach areas. The device's accuracy ensures comfortable climate control and prevents engine overheating. The SMBus interface allows integration with the vehicle's CAN bus via a microcontroller. The TMP411's wide temperature range and robust design make it suitable for automotive environments.
Recommended
Recommended Products Summary
Engineering reference data for TMP411 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TMP411-Q1 | TMP411D | TMP451 |
|---|---|---|---|---|
| Package | VSSOP-8, SOIC-8, SOT23-8 | VSSOP-8, SOIC-8, SOT23-8 | VSSOP-8, SOIC-8, SOT23-8 | VSSOP-8, SOIC-8, SOT23-8 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Local Accuracy | ±1°C | ±1°C | ±0.8°C | ±1°C |
| Remote Accuracy | ±1°C | ±1°C | ±0.8°C | ±1°C |
| Resolution | 11 bits | 11 bits | 11 bits | 12 bits |
| Supply Voltage | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V |
| N-Factor Correction | Yes | Yes | Yes | Yes |
| Automotive Grade | No | Yes (AEC-Q100) | No | No |
Key Differentiators
- N-factor and series resistance correction (vs TMP431)
- Automotive-grade option (vs TMP411D)
- Software compatibility with TMP451 (vs TMP451)
Design Notes
For accurate remote sensing, keep the D+ and D- traces short and shielded from noise. Use a 100pF capacitor between D+ and D- to filter high-frequency noise. Avoid routing these traces near high-speed digital lines or power switching circuits. According to TI's datasheet, series resistance correction compensates for up to 1kΩ of trace resistance, but minimizing trace length is still recommended.
The TMP411 operates from 2.7V to 5.5V. Use a 0.1µF decoupling capacitor close to the V+ pin to filter supply noise. If the supply is noisy, consider adding a ferrite bead. The device draws low quiescent current, making it suitable for battery-powered applications. Ensure the supply voltage is stable to maintain accuracy.
When using the remote sensor, ensure the diode-connected transistor is properly biased. The TMP411 provides a bias current, but the diode must be connected correctly (D+ to anode, D- to cathode). Incorrect polarity will result in erroneous readings. Also, avoid using the ALERT pin without a pull-up resistor, as it is open-drain.
Compliance Information
RoHS compliant per TI product page. TMP411-Q1 is AEC-Q100 qualified.
