Texas Instruments TMP141AIDGKR

Overview

TMP141AIDGKR 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, 0.25°C resolution (10-bit), 110µA typical quiescent current, and operates from 2.7V to 5.5V - enabling low-power thermal sensing on motherboards, video cards, and base stations.

For engineers reviewing the TMP141AIDGKR datasheet, TMP141AIDGKR pinout, TMP141AIDGKR application, or TMP141AIDGKR equivalent, this page provides verified package mapping (MSOP-8), validated SensorPath timing parameters, confirmed four-device bus addressing, and real-world design implications of its open-drain SWD interface and address-pin configuration.

Technical Context

The TMP141AIDGKR implements a diode-based on-die temperature sensor interfaced via a proprietary single-wire SensorPath protocol using pulse-width encoded signaling on an open-drain SWD line. It supports up to four devices per bus via ADD0/ADD1 address pins, with device number derived directly from physical pin states at power-up.

Its internal architecture includes a ΔΣ A/D converter, oscillator, control logic, and configurable registers (e.g., Device Control Register at address 5h, Temperature Readout at 9h). Conversion time is programmable (default 190 ms) and depends on Low-Power Mode and Conversion Rate register settings - not fixed by hardware.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMP141AIDGKR, TMP112AIDRLR offers better accuracy in limited temperature ranges but sacrifices industrial-grade operation and single-wire bus efficiency; LM75BIMMX/NOPB provides identical package and temp range but lacks SensorPath's multi-drop simplicity and low-power optimization.

Availability

TMP141AIDGKR is available at Aetrix Electronics and suitable for motherboard thermal monitoring, video card hot-spot detection, and telecom base station cabinet sensing requiring stable component supply across extended temperature and long-lifecycle deployments.

Supply support for TMP141AIDGKR 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 company specializing in analog and embedded processing technologies, with leadership in precision sensing and low-power interface solutions.

The TMP141AIDGKR belongs to TI's SensorPath temperature sensor family, engineered specifically for hardware health monitoring in space- and power-constrained computing and communications equipment using single-wire bus architecture.

FAQ

What is the correct pull-up resistor value for the TMP141AIDGKR SWD line?

The TMP141AIDGKR requires a 1.25kΩ ±30% pull-up resistor on the SWD line to meet specified rise/fall time requirements (tr ≤ 1000ns, tf ≤ 300ns) with 400pF bus capacitance. This value is defined in the Electrical Characteristics table and validated in Figure 1 timing diagrams. Using a different resistor may cause communication failures due to violated timing margins. The resistor may be integrated into the master device or placed externally - either configuration satisfies TMP141AIDGKR interface compliance.

How does the TMP141AIDGKR determine its device address?

The TMP141AIDGKR derives its 3-bit device number from the logic states of ADD0 and ADD1 pins at power-up or reset, per Table 2: ADD1:ADD0 = 00 → 001b, 01 → 010b, 10 → 011b, 11 → 100b. This value is stored in register 0 and used for slave selection on the SensorPath bus. The TMP141AIDGKR reads these pins during each conversion or bus transaction, supporting dynamic reconfiguration if pins are driven by logic rather than hardwired.

Can the TMP141AIDGKR operate outside its specified −40°C to +125°C range?

The TMP141AIDGKR has an absolute maximum operating temperature of −55°C to +127°C per Absolute Maximum Ratings, but its guaranteed performance - including ±2°C accuracy and functional operation - applies only within the specified −40°C to +125°C range. Operation beyond this range may yield unvalidated accuracy, increased error, or intermittent functionality. The TMP141AIDGKR datasheet explicitly states that accuracy degrades to ±3°C over −40°C to +125°C, confirming the upper limit of spec-compliant use.

What happens if multiple TMP141AIDGKR devices share the same address on the SensorPath bus?

If two or more TMP141AIDGKR devices are configured with identical ADD0/ADD1 states, they will respond simultaneously to the same device number - causing bus contention, parity errors (BER flag set), and failed transactions. The TMP141AIDGKR does not implement collision avoidance or arbitration. To prevent this, each TMP141AIDGKR on a shared bus must have a unique ADD0:ADD1 combination (00, 01, 10, or 11), ensuring distinct device numbers (001b–100b) as required by SensorPath protocol.

Does the TMP141AIDGKR require external components for basic temperature measurement?

No - the TMP141AIDGKR requires no external sensing elements, trimming resistors, or calibration circuitry. Its on-die diode sensor and integrated ΔΣ A/D converter enable fully self-contained temperature measurement. Only two external components are mandatory for operation: a 1.25kΩ pull-up resistor on SWD and a 0.1µF bypass capacitor on V+ (per Figure 3). These support interface timing and supply stability - not sensing functionality.