Texas Instruments TMP1075DGKT

Overview

TMP1075DGKT from Texas Instruments is a high-accuracy, low-power digital temperature sensor with I²C/SMBus interface, ±0.25°C typical accuracy from −55°C to 125°C, 12-bit resolution (0.0625°C), and 2.7 µA average supply current. It operates from 1.7 V to 5.5 V and delivers pin-to-pin compatibility with LM75/TMP75 in an industry-standard 8-pin VSSOP package for thermal monitoring in power supplies and embedded systems.

For engineers reviewing the TMP1075DGKT datasheet, TMP1075DGKT pinout, TMP1075DGKT application, or TMP1075DGKT equivalent, this page provides verified specifications, validated pin functions, confirmed LM75 software compatibility, NIST-traceable calibration data, and real-world thermal management use cases - all specific to the DGK-package variant.

Technical Context

The TMP1075DGKT integrates an on-chip 12-bit ADC with 0.0625°C resolution and uses an internal bipolar junction transistor (BJT) thermal sensor. Its digital output is stored in a read-only 16-bit temperature register (12 MSBs valid), with two's-complement encoding for negative values.

It supports I²C fast mode (400 kHz) and high-speed mode (2.56 MHz), implements SMBus Alert and Reset functions, and features three address pins (A0–A2) enabling up to 32 device addresses on a shared bus - all while maintaining backward compatibility with LM75 register maps and command sequences.

Key Specifications

Pinout & Package

VSSOP-8 (DGK) package: 3.00 mm × 4.90 mm body, 0.65 mm lead pitch, gull-wing leads. RoHS-compliant, moisture sensitivity level 2a.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMP1075DGKT, TMP117MRTFR trades bus flexibility for higher precision, while LMT70YFQR eliminates digital complexity at the cost of added system integration effort - making TMP1075DGKT optimal for scalable, interrupt-driven thermal management in resource-constrained embedded designs.

Availability

TMP1075DGKT is available at Aetrix Electronics and suitable for power-supply thermal monitoring, enterprise storage enclosures, and industrial motor drives requiring stable component supply, long-term lifecycle support, and guaranteed NIST-traceable calibration.

Supply support for TMP1075DGKT 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The TMP1075 product line targets high-accuracy, low-power thermal management in space-constrained systems - designed specifically to replace legacy LM75-family sensors with enhanced resolution, wider temperature range, and modern bus compatibility.

FAQ

What is the operating temperature range for the TMP1075DGKT?

The TMP1075DGKT is specified for operation from −55°C to +125°C. This full-range specification applies to the DGK (VSSOP-8) package variant and is validated across the entire supply range (1.7 V to 5.5 V). Accuracy remains ±0.25°C typical within this span, supporting deployment in harsh environments such as industrial controls and telecom infrastructure where ambient extremes are common. The TMP1075DGKT maintains functional integrity up to 150°C junction temperature per absolute maximum ratings.

Does the TMP1075DGKT support I²C fast mode and high-speed mode?

Yes, the TMP1075DGKT supports I²C fast mode up to 400 kHz and high-speed mode up to 2.56 MHz. These timing capabilities are explicitly validated for the DGK package across −55°C to +125°C and 1.7 V to 5.5 V supply. The device includes integrated Schmitt triggers and 50 ns spike filters on SDA/SCL to ensure noise immunity at high frequencies. Unlike the TMP1075N variant, the TMP1075DGKT retains full 32-address support and SMBus Alert functionality in both modes.

How many I²C addresses can the TMP1075DGKT support?

The TMP1075DGKT supports up to 32 unique I²C addresses using its three hardware-configurable address pins (A0, A1, A2). Each pin accepts GND, V+, SDA, or SCL logic levels, enabling flexible bus topology design. This capability is confirmed for the DGK package and allows dense multi-sensor deployments - for example, monitoring 32 individual VRM phases on a single server motherboard - without address conflicts or bus segmentation.

Is the TMP1075DGKT pin-compatible with the LM75?

Yes, the TMP1075DGKT is pin-to-pin compatible with the LM75 in the VSSOP-8 (DGK) package. Pin assignments for SDA, SCL, GND, V+, ALERT, and address inputs match exactly. This mechanical and electrical compatibility enables direct PCB-level replacement without layout changes. Additionally, the TMP1075DGKT maintains register-level software compatibility, allowing existing LM75 firmware to operate unchanged while gaining improved accuracy, lower power, and extended temperature range.

What is the resolution and accuracy of the TMP1075DGKT temperature measurement?

The TMP1075DGKT provides 12-bit temperature resolution (0.0625°C per LSB) and ±0.25°C typical accuracy from −55°C to +125°C. Accuracy degrades to ±1°C maximum over −40°C to +110°C and ±2°C maximum across the full −55°C to +125°C range. These values are measured and 100% production-tested using NIST-traceable, ISO/IEC 17025-accredited equipment - ensuring metrological confidence for thermal protection and closed-loop control applications.