Texas Instruments TMP275AIDGKT

Overview

TMP275AIDGKT from Texas Instruments is a ±0.5°C accurate digital temperature sensor IC with 12-bit ΔΣ ADC, I²C/SMBus interface, and programmable resolution (9–12 bits), operating from 2.7 V to 5.5 V in a VSSOP-8 package. It delivers 0.0625°C resolution at 12-bit mode and supports thermostat control via ALERT pin for thermal protection in power supplies and embedded systems.

For engineers reviewing the TMP275AIDGKT datasheet, TMP275AIDGKT pinout, TMP275AIDGKT application, or TMP275AIDGKT equivalent, key selection criteria include its ±0.5°C accuracy from −20°C to 100°C, 50 µA typical quiescent current, eight I²C address options via A0–A2 pins, and compatibility with LM75/TMP75 register maps for drop-in replacement in legacy thermal monitoring designs.

Technical Context

The TMP275AIDGKT integrates a precision bandgap temperature sensor, 12-bit delta-sigma ADC, on-chip oscillator, and I²C/SMBus slave interface with open-drain SDA/SCL/ALERT pins. Its internal block diagram confirms direct die-temperature sensing with no external components required.

It supports three functional modes-continuous conversion, shutdown (0.1 µA), and one-shot-with configurable thermostat behavior (comparator or interrupt mode) driven by THIGH/TLOW registers. Address selection via A0–A2 enables up to eight devices on a single bus without arbitration conflict.

Key Specifications

Pinout & Package

VSSOP-8 package (3.00 mm × 3.00 mm), thin-profile surface-mount, compatible with standard SOIC-8 PCB footprints but with reduced board area.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMP75AIDGKR and LM75BIMM/NOPB, the TMP275AIDGKT provides superior accuracy and flexibility-its ±0.5°C spec enables tighter thermal safety margins, while its 9–12-bit resolution and SMBus Alert support deliver design scalability for next-generation thermal management systems.

Availability

TMP275AIDGKT is available at Aetrix Electronics and suitable for power-supply temperature monitoring, computer peripheral thermal protection, and battery management systems requiring stable component supply across long-lifecycle industrial programs.

Supply support for TMP275AIDGKT 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, embedded processing, and connectivity technologies, with decades of leadership in precision sensing and power management ICs.

The TMP275AIDGKT belongs to TI's high-accuracy digital temperature sensor product line, engineered specifically for thermal protection and compensation in power electronics, computing infrastructure, and industrial automation where reliability and calibration stability are critical.

FAQ

What is the accuracy specification of the TMP275AIDGKT over its full operating range?

The TMP275AIDGKT achieves ±0.5°C maximum accuracy from −20°C to 100°C and ±1°C maximum from −40°C to 125°C. This is factory-calibrated and does not require system-level correction. The TMP275AIDGKT maintains this performance across its 2.7 V to 5.5 V supply range and is validated per JEDEC JESD22-A108 thermal cycling standards.

Does the TMP275AIDGKT support I²C fast-mode plus (1 MHz) or high-speed mode?

Yes, the TMP275AIDGKT supports high-speed I²C mode up to 2.38 MHz when the master issues the Hs-mode master code. It also operates reliably in standard (100 kHz) and fast-mode (400 kHz) I²C, as well as SMBus 2.0. The TMP275AIDGKT includes integrated spike suppression filters and Schmitt triggers on SDA and SCL to ensure robustness at all supported speeds.

How many I²C addresses can be configured on the TMP275AIDGKT?

The TMP275AIDGKT supports eight unique I²C slave addresses using the A0, A1, and A2 pins. Each pin accepts GND or V+, forming a 3-bit binary code that maps to addresses 0x48–0x4F. This allows up to eight TMP275AIDGKT devices to share a single I²C bus without address conflict, enabling compact multi-zone thermal monitoring.

What is the function of the ALERT pin on the TMP275AIDGKT?

The ALERT pin on the TMP275AIDGKT is an open-drain output that asserts low when temperature exceeds THIGH or falls below TLOW, depending on Thermostat Mode (TM) bit setting. In Interrupt Mode (TM=1), reading the temperature register clears ALERT; in Comparator Mode (TM=0), it remains active until temperature returns within limits. The TMP275AIDGKT also supports SMBus Alert protocol for master-initiated fault identification.

Is the TMP275AIDGKT pin-compatible with the LM75 family?

Yes, the TMP275AIDGKT is pin- and register-compatible with the LM75, TMP75, TMP75B, and TMP175. Its VSSOP-8 footprint matches LM75BIMM/NOPB's SOIC-8 outline in pad layout (with minor dimensional differences), and its register map-including Pointer, Temperature, Configuration, THIGH, and TLOW-is identical. Firmware written for those parts runs unchanged on the TMP275AIDGKT.