Temperature Sensors
Products (40)
STTS751 - 1.8V to 3.6V Digital Temperature Sensor | STMicroelectronics
The STTS751 is a low-voltage, digital temperature sensor from STMicroelectronics that provides high-accuracy temperature monitoring with an I2C/SMBus serial interface. It operates from a supply voltage range of 1.8V to 3.6V and is available in a compact 6-pin UDFN package (2x2 mm). The device measures temperature with a typical accuracy of ±1°C (from +75°C to +95°C) and offers a programmable resolution from 9 to 12 bits, allowing designers to trade off conversion time versus resolution. A digital temperature sensor is an integrated circuit that converts ambient temperature into a digital output, typically using an internal bandgap reference and an analog-to-digital converter (ADC). It belongs to the broader category of temperature sensors, which are essential in thermal management systems for monitoring and protecting electronic components. Digital temperature sensors like the STTS751 are preferred over analog sensors (e.g., thermistors) because they provide direct digital readout, eliminate the need for calibration, and can be easily interfaced with microcontrollers via standard communication protocols such as I2C or SMBus. Key features of the STTS751 include a programmable resolution (9 to 12 bits), an SMBus-compatible interface with up to 400 kHz clock frequency, and a standby current of only 3.5 µA (typical) to extend battery life in portable applications. The device also supports a one-shot mode for single temperature readings, which reduces power consumption further. The operating temperature range is -40°C to +125°C, making it suitable for a wide range of environments. The STTS751 uses a sigma-delta ADC architecture to achieve high accuracy and low noise. It includes an on-chip oscillator and a digital comparator that can generate an interrupt (ALERT) when the temperature exceeds programmable high or low limits. The device also features a shutdown mode that reduces current consumption to 0.5 µA (typical), ideal for power-sensitive designs. Typical applications include system thermal management in laptops, servers, and industrial controllers; battery temperature monitoring in smartphones and tablets; and environmental monitoring in IoT devices. The small UDFN package and low power consumption make it an excellent choice for space-constrained, battery-powered designs. When designing with the STTS751, ensure proper PCB layout to minimize thermal coupling from other heat sources. Place the sensor away from power components and provide adequate copper pour for heat dissipation. The I2C address is set by the ADD0 pin, allowing up to two devices on the same bus.
TC1047AVNBTR - Analog Temp Sensor 10mV/°C SOT-23-3 | Microchip
The Microchip Technology TC1047AVNBTR is a precision analog output temperature sensor that converts local temperature to a linear voltage proportional to °C, housed in a 3-pin SOT-23B package with a 10 mV/°C output slope and -40°C to +125°C measurement range. It operates from 2.5 V to 5.5 V supply, draws 35 µA typical operating current, and delivers ±2 °C maximum accuracy at +25 °C. An analog temperature sensor IC is a semiconductor device whose output voltage (or current) varies linearly with on-die temperature, enabling direct ADC readout by a microcontroller or comparator without requiring firmware-side linearization tables. This class of sensor belongs to the broader family of temperature sensors (local vs. remote), which in turn sits under the sensors hierarchy that ultimately maps onto signal-chain and power-management blocks in mixed-signal systems. Key features of the TC1047AVNBTR include a calibrated 10 mV/°C slope, 100 mV typical output at -40 °C, 500 mV at 0 °C, 750 mV at +25 °C and 1.75 V at +125 °C, an industry-standard 3-pin SOT-23B footprint, low 35 µA quiescent current, and automotive-grade temperature range. The high-impedance output stage simplifies ADC interfacing and supports low-power duty-cycled measurements. The device uses a bandgap-core PTAT (proportional-to-absolute-temperature) architecture that produces a linear mV/°C response across the full -40 °C to +125 °C span, eliminating the piecewise correction needed by thermistor or thermocouple solutions. The internal curvature correction and factory trimming hold ±2 °C maximum error at +25 °C, with predictable drift across the operating range. Typical applications include microcontroller thermal monitoring, battery-pack overtemperature protection, HVAC thermometry, and industrial process control where a ratiometric or single-ended analog signal feeds an MCU ADC. The simple three-pin interface also suits handheld and portable instruments. When designing with this part, place a 0.1 µF decoupling capacitor close to VDD and ensure the ADC input has adequate input impedance to avoid loading the high-impedance sensor output. The wide 2.5 V to 5.5 V supply range permits direct connection to 3.3 V or 5 V rails. This page synthesizes Microchip datasheet specifications, distributor pricing from LCSC and DigiKey, SOT-23B drop-in alternatives, and practical design notes for fast BOM validation.
TMP117 - ±0.1°C 16-bit I2C Temp Sensor | TI | Medical/RTD
The Texas Instruments TMP117 is a high-accuracy, low-power digital temperature sensor delivering a 16-bit result with 0.0078°C resolution and up to ±0.1°C accuracy from -20°C to 50°C without calibration, in a 6-pin WSON (DRV) or WCSP-6 (YBGR) package. It is designed to meet ASTM E1112 and ISO 80601 requirements for electronic patient thermometers and serves as a single-chip digital alternative to PT100/PT1000 platinum RTDs. A digital temperature sensor is an IC that measures its own die temperature and outputs the value over a serial bus such as I2C or SMBus. Within the semiconductor hierarchy, the TMP117 belongs to the local digital temperature sensor family under temperature sensor ICs. Compared with analog solutions (thermistors, RTDs), it eliminates signal conditioning, ADCs, and calibration while improving linearity and system accuracy. Key features include a 1.8V to 5.5V supply range (operating from 1.7V per TI datasheet SBOS961), 3.5uA typical operating current for battery-powered designs, and a 48-bit onboard EEPROM storing configuration and temperature offset calibration. Programmable high/low limit registers drive an ALERT interrupt pin, enabling autonomous over-temperature monitoring without host polling. Technically, the TMP117 uses a bandgap-based sensing element digitized by a precision ADC. It is factory-calibrated and NIST-traceable, and supports four I2C/SMBus addresses (0x48 to 0x4B) via the ADD0 pin, so up to four devices can share one bus. Low 3.5uA consumption minimizes self-heating error, which is often the dominant accuracy limit in tiny WSON and WCSP packages. Accuracy is ±0.15°C across the extended -40°C to 125°C range. Typical applications include medical patient thermometers, wearable health monitors, cold-chain data loggers, HVAC systems, and precision instrumentation RTD replacement. Its ±0.1°C uncalibrated accuracy outperforms most competitive digital sensors such as the DS18B20 or HDC1080. Design tip: place the sensor thermally close to the measured source; per TI layout guidance, keep the decoupling capacitor within 5mm and I2C pull-up resistors at least 10mm away to minimize self-heating and noise. Prices as of 2026-08-30.
TMP20AIDCKR - +/-2.5C Analog Temp Sensor, -55 to 130C | TI
The Texas Instruments TMP20AIDCKR is a CMOS precision analog-output temperature sensor in a 5-pin SOT-SC70 (DCK) package, operating from -55C to +130C with +/-2.5C accuracy and a linear transfer function of -11.77 mV/C. The device runs on a 2.7 V to 5.5 V supply with only 4 uA quiescent current, and supports operation as low as 1.8 V for temperatures between 15C and 130C. The tiny SOT-563 / SC-70-5 footprint makes it ideal for space-constrained designs. An analog temperature sensor is a semiconductor device whose output voltage (or current) varies linearly with the die temperature, allowing a microcontroller ADC to read temperature directly without requiring a specialized digital interface. The TMP20 family belongs to the broader hierarchy of temperature sensor -> thermal management sensor -> sensor IC -> semiconductor. Compared with digital-output sensors (I2C/SPI), analog sensors eliminate firmware, protocol overhead, and pull-up resistors - they are typically preferred when the host MCU lacks free I2C buses, when a simple threshold comparator trip is sufficient, or when continuous analog proportional control is required. Key features include a low 4 uA supply current that supports battery-powered and energy-harvesting applications, a wide operating range of -55C to +130C, and a slope of -11.77 mV/C (negative coefficient, meaning output voltage decreases as temperature rises). The device also offers +/-0.5C typical accuracy at 30C and +/-2.5C maximum accuracy across the full range, low self-heating due to the very low quiescent current, and 5-lead SC-70 (DCK) packaging for low-profile PCB assemblies. The TMP20AIDCKR uses a precision bandgap reference and on-chip bipolar transistors in a proportional-to-absolute-temperature (PTAT) topology to produce the linear -11.77 mV/C output. This architecture provides superior noise rejection from the supply rail and enables predictable ADC conversion at the host MCU, since each ADC LSB corresponds to a known temperature increment based on the slope and ADC reference. Typical applications include portable and battery-powered devices, HVAC thermistor replacement, environmental monitoring, and thermal protection of power components. The wide operating range and low quiescent current suit both consumer thermometers and industrial cold-chain loggers. When designing with this part, place the decoupling capacitor as close as possible to the V+ pin and route the analog output trace away from switching nodes. Because the slope is negative and the output voltage at 25C is 1.315 V (typical), designers should account for the polarity in firmware linearization tables. This page synthesizes distributor pricing, same-brand and cross-brand drop-in alternatives, and practical analog-sensor design notes not found in the standalone manufacturer datasheet.
TMP411 - ±1°C Remote & Local Temp Sensor | Texas Instruments
The Texas Instruments TMP411 is a dual-channel digital temperature sensor that combines a local die-temperature measurement channel with a remote temperature sensing channel in a single VSSOP-8, SOIC-8, or SOT23-8 package. It is two-wire and SMBus interface-compatible and is specified over a temperature range of -40°C to 125°C. The remote temperature sensor uses diode-connected transistors, typically low-cost NPN- or PNP-type transistors or diodes that are an integral part of microcontrollers, microprocessors, or FPGAs. Remote accuracy is ±1°C for multiple device manufacturers, with no calibration needed. 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.
TMP411-Q1 - ±1°C Remote/Local Temp Sensor | Texas Instruments
The Texas Instruments TMP411-Q1 is an automotive-grade dual-channel digital temperature sensor combining a local die-temperature channel and a remote junction-temperature channel in a single 8-pin VSSOP (DGK) package. It operates from a 2.7V to 5.5V supply over an ambient range of -40°C to +125°C, with remote measurement up to 150°C and ±1°C remote accuracy. A temperature sensor converts thermal energy into an electrical signal for monitoring and control. The TMP411-Q1 belongs to the digital temperature sensor class, outputting 12-bit readings over an I2C/SMBus two-wire interface instead of an analog voltage. Within the thermal-management hierarchy it sits as a remote/local digital sensor monitor within the broader sensor and power-management families used across automotive, industrial, and computing platforms. Key features include programmable non-ideality (N) factor and series-resistance cancellation, which compensate for external transistor non-idealities and PCB trace resistance to preserve accuracy across the full range. Programmable resolution and threshold limits, minimum/maximum temperature monitors, diode fault detection, and a temperature alert function complete the feature set. Technically, the TMP411-Q1 uses an internal ADC to measure the voltage across a diode-connected remote transistor, typically NPN/PNP devices embedded in MCUs, MPUs, or FPGAs. N-factor correction adjusts for the ideality factor of the external transistor, while series-resistance correction cancels line-resistance error. SMBus timeout and alert-response support improve bus robustness, and low shutdown quiescent current (approximately 8 uA) suits always-on automotive nodes. Typical applications include automotive battery management systems, engine control units, infotainment processors, and CPU/GPU thermal monitoring in embedded and data-center systems, where accurate remote junction sensing directly protects performance and reliability. Design tip: keep remote-sense traces short and routed as a differential pair away from noise, configure the N-factor and series-resistance registers to match the external transistor, and use pull-ups on the open-drain I2C and alert lines. Prices shown are as of 2026-08-29.
TMP411ADGKR - ±1°C Remote/Local Temp Sensor | TI | I2C/SMBus
The Texas Instruments TMP411ADGKR is a remote and local digital temperature sensor with ±1°C remote and local accuracy, an 11-bit digital output, and a wide -40°C to +125°C operating range, housed in an 8-pin VSSOP (DGK) surface-mount package with two-wire I2C/SMBus serial interface. A remote digital temperature sensor measures temperature by sensing the junction voltage of a diode-connected transistor that is often built into a microcontroller, microprocessor, or FPGA die. Because this sensing element sits directly on the hot silicon, remote sensors like the TMP411 report die temperature far more accurately than board-level thermistors or local-only sensors. The TMP411 belongs to the temperature sensor hierarchy: temperature sensor IC -> digital temperature sensor -> remote/local digital sensor -> thermal monitoring IC within a broader system-monitoring stack. Key features include programmable non-ideality (N) factor correction, which compensates for the manufacturing variation of the remote transistor, and series resistance cancellation that removes the error caused by PCB trace resistance between the sensor and remote diode. An ALERT output flags out-of-limit temperatures, while offset registers allow one-point system calibration for even tighter accuracy. The device is pin- and register-compatible with the Analog Devices ADT7461, giving designers a proven second source. The sensor digitizes both its own local die temperature and the remote diode temperature with 11-bit resolution (0.125°C steps in extended mode), and communicates over an industry-standard two-wire SMBus/I2C bus that supports multiple slave addresses selected by the ADD pin. Fault queueing and bus-timeout detection guard against bus lock-up in noisy environments. Typical applications include CPU, GPU, and FPGA die-temperature monitoring in servers and networking equipment, thermal supervision of power supplies and base stations, and industrial automation modules requiring two independent temperature zones from one IC. In layout, keep the DXP/DXN routing symmetric and short; the series-resistance cancellation handles a few ohms of trace resistance, but excessive capacitance or noise pickup on the differential pair degrades remote accuracy. This page adds value beyond the manufacturer datasheet by synthesizing distributor pricing as of 2026-09-02, drop-in alternatives (including the ADT7461 cross-brand equivalent), and practical PCB design notes into a single engineering reference.
TMP411ADR - ±1°C Remote/Local Temp Sensor | TI | SOIC-8
The Texas Instruments TMP411ADR is a ±1°C remote and local digital temperature sensor with N-factor and series-resistance correction, an 11-bit resolution output, and an I2C/SMBus serial interface, housed in an 8-pin SOIC (D) package. It measures its own die temperature (local channel) plus an external diode-connected transistor, typically integrated in a microcontroller, microprocessor, or FPGA die, over a -40°C to +125°C sensing range from a 2.7V to 5.5V supply. A remote/local temperature sensor is a monitoring IC within the broader power-management and thermal-management hierarchy of an electronic system. Unlike a standalone thermistor or analog-output sensor, it digitizes temperature internally and reports readings over a two-wire bus, allowing a host controller to poll multiple thermal zones, trigger alerts, and throttle clocks or fans before damage occurs. Remote-junction sensing is essential because the hottest point in modern electronics is usually the silicon die itself, not the PCB surface. Key features include ±1°C remote diode accuracy, programmable non-ideality (N-factor) correction that lets the device match different processor thermal diodes, and series-resistance cancellation that removes D+/D- PCB trace resistance error. An ALERT output flags out-of-limit readings while a THERM output provides a comparator-style hot-limit signal for direct fan or shutdown control. Architecturally, the TMP411 uses a delta-sigma ADC to convert the ratio of two diode forward currents into a digital temperature code with 0.0625°C LSB (11-bit), and applies digital correction factors for beta and series resistance. Typical applications include CPU/FPGA/GPU die temperature monitoring in servers and networking equipment, thermal supervision in industrial automation, and fan-speed control loops in power supplies and base stations. Design consideration: keep D+ and D- traces short, routed as a differential pair away from switching noise, since series resistance and coupled noise directly degrade remote accuracy. This page adds value beyond the datasheet by consolidating distributor pricing, drop-in alternatives, comparison tables, and practical design notes in one place.
TMP411AQDGKRQ1 - ±1°C Remote/Local Temp Sensor AEC-Q100 | TI
The Texas Instruments TMP411AQDGKRQ1 is an automotive-qualified (AEC-Q100) remote and local digital temperature sensor with N-factor and series-resistance correction, offering ±1°C remote accuracy across a -40°C to +125°C sensing range in an 8-pin VSSOP (DGK) package with a 2-wire SMBus interface and 11-bit output resolution. A remote temperature sensor is a power-management IC that measures die temperature of external devices such as CPUs, GPUs, FPGAs, and microcontrollers by sensing the base-emitter voltage of a diode-connected transistor integrated in those chips. Remote sensors sit within the broader hierarchy of temperature sensors, digital temperature sensor ICs, and thermal monitoring subsystems, and are a core element of system-level thermal management in electronics. Key features include ±1°C remote accuracy for multiple IC manufacturers' on-chip transistors, remote and local temperature channels, programmable N-factor correction, and series-resistance correction that cancels PCB trace resistance errors. The TMP411-Q1 supports programmable high- and low-temperature limits with ALERT and THERM outputs for fault and overtemperature indication, all monitored over a 2-wire SMBus serial interface. The device operates from a 2.7V to 5.5V supply and digitizes temperature with 11-bit resolution, giving 0.125°C steps. The N-factor correction register allows adaptation to different transistor ideality factors, while series resistance correction compensates up to a specified ohmic value on the D+/D- lines, eliminating the largest systematic remote-sensing error source without external calibration. Typical applications include automotive ECU and infotainment thermal monitoring, CPU/FPGA die-temperature supervision in industrial and telecom equipment, and overtemperature protection in power supplies and base stations. Design tip: minimize and match the D+/D- trace lengths and use the series-resistance correction register to cancel residual board resistance; place the local sensor away from high-dissipation components to keep local readings representative. This page adds distributor-sourced pricing, drop-in alternatives within the TMP411-Q1 family, and practical design notes that go beyond the manufacturer datasheet.
TMP411BDGKR - ±1°C Remote/Local Temp Sensor | Texas Instruments
The Texas Instruments TMP411BDGKR is a ±1°C remote and local temperature sensor with N-factor and series-resistance correction, featuring an 11-bit digital output and -40°C to +125°C operating range, housed in an 8-pin VSSOP (MSOP-8, DGK) package. A remote/local digital temperature sensor is a monitoring IC that measures temperature both at its own silicon (local channel) and at a remote diode-connected transistor (remote channel), typically a low-cost NPN or PNP device integrated into a microcontroller, CPU, GPU, or FPGA die. These sensors form part of the thermal management hierarchy — sensor, monitor, supervisor, power-management IC — and communicate measurements to a host controller over a serial bus such as I2C or SMBus so that fan speed, clock throttling, or system shutdown can be managed automatically. Key features include ±1°C maximum accuracy on both local and remote channels, 11-bit resolution (0.125°C per LSB) on the remote channel, support for a 2.7V to 5.5V supply range, and programmable N-factor correction that accommodates different transistor beta characteristics. The built-in series-resistance correction cancels the error introduced by PCB trace resistance in the remote diode loop, eliminating a common source of measurement error without precision layout constraints. Architecturally, the TMP411 uses a delta-sigma style remote diode measurement with automatic averaging, beta compensation, and programmable offset registers. Its ALERT/THERM output supports interrupt and thermostat-style behavior with programmable high/low limits, and the ADD pin provides three selectable SMBus addresses for multi-device bus sharing. Pin and register compatibility with Analog Devices ADT7461 and ADM1032 simplifies migration between vendors. Typical applications include CPU/FPGA/GPU die temperature monitoring in servers and networking equipment, thermal supervision in industrial controls and base stations, and power-supply over-temperature protection where the remote diode monitors a hotspot the local sensor cannot reach. Design consideration: place the TMP411 thermally close to the local hotspot and route the D+/D- differential pair tightly, though series-resistance correction relaxes trace-resistance limits substantially. This page synthesizes distributor pricing, pin-compatible drop-in alternatives, design notes, and an AEO-optimized FAQ not found on the manufacturer datasheet alone.
TMP411CDGKT - ±1°C Remote/Local Temp Sensor MSOP-8 | TI
The Texas Instruments TMP411CDGKT is a ±1°C remote and local digital temperature sensor with N-factor and series-resistance correction, offering 11-bit (0.0625°C) resolution, a -40°C to +125°C sensing range, and a 2.7 V to 5.5 V supply, housed in an 8-pin VSSOP/MSOP (DGK) package. A remote digital temperature sensor is a monitoring IC that measures the junction temperature of a distant diode-connected transistor - typically an on-chip sensing diode built into a CPU, GPU, FPGA, or ASIC - in addition to its own local die temperature. These sensors form the monitoring layer of the power-management hierarchy, feeding a host controller over a two-wire SMBus/I2C-style interface so that fans, clock throttling, and shutdown protection can react to real silicon temperatures. Key features of the TMP411C include ±1°C remote diode sensing accuracy, ±1°C local accuracy across the operating range, programmable non-ideality (N-factor) correction to compensate for different process transistors, and automatic series-resistance cancellation that removes the error caused by PCB trace resistance of up to several hundred ohms in the D+/D- loop. Architecturally, the device excites the remote diode with two different currents and measures the resulting delta-VBE, converting it through an on-chip 11-bit ADC into a two-wire digital code. Register-based high and low limits drive the ALERT and THERM outputs, allowing both interrupt-driven and hardware-throttle fault responses without host intervention. Typical applications include CPU/FPGA/ASIC junction monitoring in servers, telecom line cards, and industrial control systems, where the N-factor and series-resistance corrections let one PCB footprint support many silicon vendors. Design consideration: place the sensor close to the heat source and use a diode-connected NPN with a recommended operating range; route D+/D- as a closely coupled pair to minimize noise pickup. This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet.
TMP411CDR - ±1°C Remote/Local Temp Sensor | TI | SOIC-8
The Texas Instruments TMP411CDR is a ±1°C remote and local digital temperature sensor with N-factor and series-resistance correction, a 2.7 V to 5.5 V supply range, and an SMBus/I2C-compatible digital output, housed in an 8-pin SOIC (D) package. A remote and local temperature sensor is a class of digital temperature monitor IC within the broader hierarchy of temperature sensors -> thermal management ICs -> system monitoring. These devices measure the temperature of a remote diode-connected transistor - typically a low-cost NPN or PNP transistor integrated into a microcontroller, microprocessor, or FPGA die - while also measuring ambient temperature at the sensor's own die with an internal local channel. Key features of the TMP411 include ±1°C remote temperature accuracy and ±1°C local accuracy, a sensing range of -40°C to +125°C, 11-bit resolution, and two unique correction mechanisms: N-factor correction (which compensates for the beta/N-factor of the specific remote transistor) and series-resistance correction (which cancels PCB-trace resistance errors in the D+/D- remote loop). An SMBus ALERT/THERM output supports interrupt-driven thermal fault handling. Technically, the remote channel uses a two-current-ratio delta-VBE measurement technique; the series-resistance correction cancels up to approximately 100 ohms of parasitic resistance, enabling long or lossy PCB traces to the remote junction. The digital interface operates over SMBus with 2.7 V to 5.5 V logic compatibility, and the temperature data register is read as two bytes for the 11-bit result. Typical applications include CPU/GPU/FPGA die-temperature monitoring in servers and networking equipment, thermal supervision in industrial automation controllers, and power-supply or power-module temperature reporting where the remote diode sits on a hot component. Design consideration: place the 0.1 uF input decoupling capacitor close to the V+ pin, and route the D+/D- traces as a twisted or closely coupled pair away from high-dv/dt switching nodes to preserve the ±1°C accuracy specification. This page synthesizes verified distributor data, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
TMP411CQDGKRQ1 - ±1C Remote/Local Temp Sensor AEC-Q100 | TI
The Texas Instruments TMP411CQDGKRQ1 is an automotive-grade AEC-Q100 qualified remote and local digital temperature sensor with ±1°C remote accuracy, 11-bit resolution, and N-factor and series-resistance correction, housed in an 8-pin VSSOP (DGK) package operating from -40°C to +125°C. A remote/local temperature sensor is a digital IC in the temperature sensor family of semiconductor devices that monitors two thermal points simultaneously: an on-chip local sensor and a remote sensing transistor. The remote element is typically a diode-connected NPN or PNP transistor that is built into microcontrollers, microprocessors, FPGAs, or ASICs. These sensors digitize the remote junction temperature and communicate it over a 2-wire serial interface (I2C/SMBus), sitting at the top of the monitoring hierarchy in thermal management systems. Key features of the TMP411CQDGKRQ1 include remote accuracy of ±1°C for multiple IC manufacturers' on-chip transistors, 11-bit digital output resolution, N-factor correction that allows beta compensation for different process transistors, and series resistance correction that cancels the error caused by PCB trace resistance in the D+/D- loop. The device integrates alert and THERM outputs for over-temperature interrupt and throttling control, supporting both hardware and software thermal management schemes. The TMP411 architecture uses a band-gap-based local sensor and a delta-VBE remote measurement core. Successive-approximation conversion delivers the 11-bit result, while programmable registers set conversion rate, high/low temperature limits, and hysteresis. The 2-wire serial interface (I2C-compatible, SMBus) supports multiple devices on one bus, and the ALERT output supports SMBus protocol actions. Typical applications include FPGA and microprocessor die-temperature monitoring in networking and telecom equipment, automotive ECUs and infotainment thermal supervision, and server/datacenter board-level thermal management where remote diode sensing is required. Design tip: keep the D+ and D- traces matched and short; the series-resistance correction handles residual trace resistance, but noise pickup on long runs still degrades accuracy - filter and guard these lines. This page adds value beyond the manufacturer datasheet by compiling distributor pricing tiers, drop-in same-family alternatives, design notes, and an AEO-optimized FAQ for engineering and sourcing teams.
TMP411EDGKR - ±1°C Remote/Local Temp Sensor | Texas Instruments
The Texas Instruments TMP411EDGKR is a ±1°C remote and local digital temperature sensor with N-factor and series-resistance correction, a 12-bit output resolution, and an operating range of -55°C to +150°C, housed in an 8-pin VSSOP (DGK) package. A remote digital temperature sensor measures the junction temperature of an external diode-connected transistor - typically a low-cost NPN or PNP device that is already integrated inside a microcontroller, microprocessor, or FPGA. Together with its built-in local channel, the device forms a complete thermal-monitoring subsystem within the broader hierarchy of board-mount temperature sensors and system-management ICs, communicating results over an SMBus/I2C two-wire interface. Key features include ±1°C remote channel accuracy and ±1°C local channel accuracy for multiple device temperatures, a wide supply range of 2.7V to 5.5V, programmable N-factor correction that accommodates different transistor process characteristics, and series-resistance cancellation that removes the error introduced by PCB trace resistance in the D+/D- path. The 12-bit conversion result gives approximately 0.0625°C resolution on the remote channel. Architecture-wise, the TMP411 uses two modulated bias currents through the external sensing diode; the delta-VBE voltage is digitized by an internal ADC, and the N-factor correction register lets the device match the ideality factor of the specific processor die being monitored. The register map and pin arrangement are compatible with the Analog Devices ADT7461 and ADM1032, easing migration in existing server and networking thermal designs. Typical applications include CPU/FPGA/GPU junction-temperature monitoring in servers, base-station and networking switch thermal supervision, and industrial systems requiring both ambient (local) and hotspot (remote) sensing. For design, keep the D+/D- traces twisted and away from switching nodes; series-resistance correction tolerates up to a few ohms of trace resistance, but excessive capacitance on D+ slows or stops valid conversions. This page synthesizes distributor pricing, pin-compatible alternatives including the ADT7461 and ADM1032, and practical design notes not found in the manufacturer datasheet.
TMP421AQDCNTQ1 - ±1°C Remote/Local Temp Sensor, AEC-Q100 | TI
The Texas Instruments TMP421AQDCNTQ1 is an AEC-Q100 qualified ±1°C remote and local digital temperature sensor in an 8-pin SOT-23 package. It monitors a local on-die sensor plus one external diode-connected transistor (typically the substrate transistor of a microcontroller, CPU, or FPGA), reports results as 12-bit two's-complement codes, and supports a remote measurement range of -40°C to +150°C with a local range of -40°C to +127°C. Communication is via a two-wire SMBus/I2C-compatible serial interface with up to nine user-selectable addresses. The TMP421AQDCNTQ1 is the automotive-grade version of the TMP421, delivering ±1°C remote accuracy (versus ±2.5°C for the industrial TMP421AIDCNR), making it well suited to under-hood and cabin thermal management. A remote-junction digital temperature sensor is an integrated transducer that converts a diode-connected transistor's forward-voltage drop into a digital temperature code. Unlike analog thermistors, it applies series-resistance cancellation and a programmable non-ideality factor so that layout series resistance and discrete-transistor beta variation do not degrade accuracy. Within the broader system hierarchy this places the TMP421AQDCNTQ1 at the Sensors > Temperature Sensors layer, used alongside power management ICs, supervisors, and fan controllers. Key features include a 2.7V to 5.5V supply range, diode-fault detection for open/short conditions, configurable conversion rate, and a high-impedance analog input that ignores parallel paths. The SOT-23-8 footprint integrates into tight PCBs such as M.2 modules, server DIMMs, and battery-pack monitors where board area is constrained. Typical applications include automotive infotainment SoC thermal monitoring, server/SSD controller die-temperature reading, and battery-pack MOSFET thermistor replacement. When designing, place the TMP421AQDCNTQ1 within 10 cm of the remote diode and route the D+/D- traces as a matched differential pair to preserve ±1°C accuracy; this is the same layout rule TI recommends in the TMP42x-Q1 datasheet. When designing with this device, ensure the external NPN/PNP is the substrate-diode of the monitored device when possible, since that path has the lowest series resistance and the best matched ideality factor. The remote D+/D- traces should be routed symmetrically, not over a split plane, to avoid leakage-induced offset.
W83960G - PC Hardware Monitor IC 64-LQFP | Winbond/Nuvoton
The Winbond W83960G (listed by Nuvoton Technology Corporation as W83960G REV. B) is a dedicated hardware monitoring IC designed for PC motherboard and embedded system health management, supplied in a 64-pin LQFP (low-profile quad flat package) surface-mount package. It integrates the core functions of a hardware monitor: multi-channel voltage sensing, temperature monitoring via thermistor and thermal-diode inputs, fan-speed (tachometer) measurement, and chassis-intrusion detection, communicating with the host over an ISA/LPC-style host interface typical of the W83xxx family. A hardware monitor IC (also called a hardware monitoring controller, H/W monitor, or environmental supervisor) is a mixed-signal power-management IC that sits low in the system hierarchy of supervisory devices: sensor -> hardware monitor -> embedded controller -> Super I/O -> power management subsystem. Its role is to continuously convert analog health signals - supply-rail voltages, processor and ambient temperatures, and fan rotation pulses - into digital register values that BIOS, SMM handlers, or OS-level utilities such as lm-sensors can read and act upon. Key functional blocks of the W83960G include an analog-to-digital conversion front end for voltage and temperature channels, fan tachometer counters with programmable limits, and limit-comparison logic that can assert interrupt or alarm outputs when measured values exceed programmed thresholds. According to distributor listings (DigiKey, Jotrin), the part is categorized under Thermal Management / Sensor Output and identified as an IC H/W MONITOR in 64-LQFP. Technically, devices of this class use on-chip ADCs with input multiplexers shared between voltage-divider-based rail monitoring (Vcore, Vcc, +3.3V, +5V, +12V, battery) and negative-temperature-coefficient thermistor inputs, plus a dedicated two-terminal thermal-diode input for CPU on-die temperature. Reading resolution and conversion rates are register-configurable, allowing trade-offs between polling latency and bus traffic. Typical applications include desktop and server motherboard monitoring, industrial PC and embedded x86 platforms, storage enclosures requiring fan-speed supervision, and test/burn-in stations that log environmental data. The 64-LQFP package suits high-pin-density motherboard designs. A key design consideration is board-level sensor wiring: thermistor and thermal-diode traces should be routed away from switching-regulator noise, and voltage sense dividers must match the datasheet ratio to preserve measurement accuracy. This page synthesizes distributor sourcing data, package information, and practical design guidance not found in any single distributor listing, providing engineers with a consolidated reference for the W83960G.