Texas Instruments TMP141AIDGKT

Overview

TMP141AIDGKT from Texas Instruments is a digital temperature sensor with single-wire SensorPath interface, designed for hardware health monitoring in space-constrained systems. It delivers ±2°C accuracy over −40°C to +125°C, 10-bit resolution (0.25°C step), and operates from 2.7V to 5.5V with typical quiescent current of 110µA - enabling integration into motherboards, video cards, and telecom infrastructure.

For engineers reviewing the TMP141AIDGKT datasheet, TMP141AIDGKT pinout, TMP141AIDGKT application, or TMP141AIDGKT equivalent, key selection factors include its MSOP-8 package, four-device bus addressing, low-power conversion timing (190ms default), and absence of external sensing components.

Technical Context

The TMP141AIDGKT implements a diode-based on-die temperature sensing element interfaced via a proprietary open-drain single-wire SensorPath bus. Its internal ΔΣ A/D converter digitizes thermal voltage with 10-bit precision, and register-mapped control enables software-configurable conversion rate (64–1532ms) and attention request behavior.

Addressing is determined by ADD0/ADD1 pin states (four unique device numbers), and communication uses pulse-width encoded signaling - Start (95µs), Data 0 (15µs), Data 1 (42µs), Attention Request (196µs), and Reset (≥348µs) - all referenced to a 1.25kΩ pull-up resistor on the SWD line.

Key Specifications

Pinout & Package

Package: MSOP-8 (DGK), 3mm × 3mm, 0.65mm pitch, exposed thermal pad (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital temperature sensor applications.

Compared with TMP112AIDRVR and LM75BIMMX/NOPB, the TMP141AIDGKT uniquely combines single-wire simplicity, hardware attention signaling, and four-device bus scalability - making it optimal for new designs prioritizing interconnect reduction and interrupt-driven thermal management.

Availability

TMP141AIDGKT is available at Aetrix Electronics and suitable for motherboard thermal monitoring, video card hot-spot detection, and telecom base station RF module applications requiring stable component supply and long-term industrial-grade availability.

Supply support for TMP141AIDGKT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision sensing and industrial interface solutions.

The TMP141AIDGKT belongs to TI's SensorPath temperature sensor family, engineered specifically for hardware health monitoring in high-density computing and communications systems where board space and bus resource constraints are critical.

FAQ

What is the primary interface protocol used by the TMP141AIDGKT?

The TMP141AIDGKT uses the proprietary SensorPath single-wire interface, which relies on pulse-width encoding over an open-drain SWD line with a 1.25kΩ pull-up resistor. Unlike I²C or SPI, it requires only one signal conductor plus ground, reducing PCB routing complexity and pin count. The TMP141AIDGKT communicates using five defined signal types - Start, Data 0, Data 1, Attention Request, and Reset - each distinguished by low-pulse duration.

How does the TMP141AIDGKT achieve its ±2°C accuracy specification?

The TMP141AIDGKT achieves ±2°C maximum accuracy over −40°C to +125°C through factory-trimmed diode-based on-die sensing and calibrated ΔΣ A/D conversion. This specification is guaranteed across the full operating temperature and supply range (2.7V–5.5V) without user calibration. Accuracy degrades to ±3°C at temperature extremes beyond −25°C to +85°C, as confirmed in the electrical characteristics table of the SBAS347A datasheet.

Can multiple TMP141AIDGKT devices share the same SensorPath bus?

Yes, up to four TMP141AIDGKT devices can operate on a single SensorPath bus. Each unit is assigned a unique 3-bit device number (1–4) based on its ADD0 and ADD1 pin states, allowing the master to address individual sensors or broadcast commands. The bus supports automatic device enumeration, and the TMP141AIDGKT ignores broadcast read transactions while responding to targeted queries or broadcast writes to its Device Control register.

What is the function of the Attention Request feature in the TMP141AIDGKT?

The Attention Request feature in the TMP141AIDGKT provides hardware-level notification - a 196µs low pulse on the SWD line - indicating either temperature conversion completion (if enabled via AT_E bit) or a bus error (BER). This allows the master to avoid polling and instead respond asynchronously, improving system efficiency. The TMP141AIDGKT will not assert another Attention Request until the Status Register is read or a Bus Reset occurs.

Does the TMP141AIDGKT require external components for basic operation?

No, the TMP141AIDGKT requires no external sensing elements - its temperature measurement is performed entirely on-die using an integrated diode. For basic operation, only a 1.25kΩ pull-up resistor on the SWD line and a 0.1µF supply bypass capacitor are recommended. These passive components ensure reliable SensorPath signaling and stable power delivery; neither thermistors, RTDs, nor additional ADC circuitry are needed.