TMP461

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High accuracy remote and local temperature sensor with pin-programmable bus address

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Product details

Parameters

Local sensor accuracy (Max) (+/- C) 1 Type Remote Operating temperature range (C) -40 to 125 Supply voltage (Min) (V) 1.7 Interface type I2C, SMBus, 2-Wire Supply voltage (Max) (V) 3.6 Supply current (Max) (uA) 375 Temp resolution (Max) (bits) 12 Features ALERT Remote channels (#) 1 Addresses 9 Rating Catalog open-in-new Find other Digital temperature sensors

Package | Pins | Size

WQFN (RUN) 10 4 mm² 2 x 2 open-in-new Find other Digital temperature sensors

Features

  • Remote Diode Temperature Sensor Accuracy: ±0.75°C
  • Local Temperature Sensor Accuracy: ±1°C
  • Resolution for Local and Remote Channels: 0.0625°C
  • Supply and Logic Voltage Range: 1.7 V to 3.6 V
  • 35-µA Operating Current (1 SPS),
    3-µA Shutdown Current
  • Series Resistance Cancellation
  • η-Factor and Offset Correction
  • Programmable Digital Filter
  • Diode Fault Detection
  • Two-Wire and SMBus™ Serial Interface Compatible with Pin-Programmable Address
  • 10-Lead WQFN Package
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Description

The TMP461 device is a high-accuracy, low-power remote temperature sensor monitor with a built-in local temperature sensor. The remote temperature sensors are typically low-cost discrete NPN or PNP transistors, or substrate thermal transistors or diodes that are integral parts of microprocessors, microcontrollers, or field-programmable gate arrays (FPGAs). Temperature is represented as a 12-bit digital code for both local and remote sensors, giving a resolution of 0.0625°C. The two-wire serial interface accepts the SMBus communication protocol with up to nine different pin-programmable addresses.

Advanced features [such as series resistance cancellation, programmable nonideality factor (η-factor), programmable offset, programmable temperature limits, and a programmable digital filter] are combined to provide a robust thermal monitoring solution with improved accuracy and noise immunity.

The TMP461 is ideal for multi-location, high-accuracy temperature measurements in a variety of communication, computing, instrumentation, and industrial applications. The device is specified for operation over a supply voltage range of 1.7 V to 3.6 V, and a temperature range of –40°C to 125°C.

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Technical documentation

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Type Title Date
* Datasheet TMP461 High-Accuracy Remote and Local Temperature Sensor with Pin-Programmable Bus Address datasheet (Rev. B) Aug. 18, 2016
Application note How to Boost Your CPU, GPU, and SoC Performance Through Thermal Accuracy Sep. 22, 2020
Technical articles How to choose the right thermistor for your temperature sensing application Feb. 12, 2020
Application note Optimizing Remote Diode Temperature Sensor Design (Rev. A) Dec. 18, 2019
Technical articles How to enable thermal safety for automotive infotainment and cluster systems Oct. 15, 2019
Technical articles Driving industrial innovation with small-size sensors Sep. 12, 2019
User guide TMP461EVM User’s Guide and Software Tutorial (Rev. A) Sep. 11, 2019
Technical articles How sensor technology is evolving to meet cold chain needs Jun. 18, 2018
User guide TMP461EVM-CVAL User's Guide and Software Tutorial Sep. 25, 2017
User guide TMP461EVM User’s Guide and Software Tutorial Jul. 08, 2015

Design & development

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Hardware development

EVALUATION BOARD Download
Description

The TMP461 device is a high-accuracy, low-power remote temperature sensor monitor with a built-in local temperature sensor. The remote temperature sensors are typically low-cost discrete NPN or PNP transistors, or substrate thermal transistors or diodes that are integral parts of microprocessors (...)

Features
  • Enables full evaluation of TMP461
  • Programmable non-ideality factor
  • Series resistance cancellation
  • Address select option
  • 12-bit resolution

Software development

GUI FOR EVALUATION MODULE (EVM) Download
SBOC453.ZIP (143741 KB)

Design tools & simulation

SIMULATION MODEL Download
SLAM269.ZIP (53 KB) - IBIS Model
GERBER FILE Download
SBOC594A.ZIP (695 KB)

CAD/CAE symbols

Package Pins Download
QFN (RUN) 10 View options

Ordering & quality

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  • MSL rating/Peak reflow
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  • Qualification summary
  • Ongoing reliability monitoring

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