Texas Instruments LM75AEVM

Overview

LM75AEVM from Texas Instruments is an evaluation module designed to validate the LM75A digital temperature sensor IC in real-world I²C-based thermal monitoring systems. It integrates a pre-mounted LM75AIM/NOPB in 8-pin VSSOP package, supports user-configurable 7-bit I²C slave addresses (0x48–0x4F), delivers ±2°C accuracy from –25°C to 100°C, and features an over-temperature shutdown (OS) output for thermal watchdog applications.

For engineers reviewing the LM75AEVM datasheet, LM75AEVM pinout, LM75AEVM application, or LM75AEVM equivalent, this EVM enables rapid validation of temperature sensing performance, register-level I²C communication, slave address configuration, and OS interrupt behavior - all using LabVIEW-based GUI software with Registers, Graphing, and Control tabs.

Technical Context

The LM75AEVM implements a complete hardware interface between a PC and the LM75A sensor via the USB2ANY bridge board, which acts as an I²C master controlled by LabVIEW software. It provides direct access to all LM75A registers including temperature, configuration, hysteresis, and OS threshold values.

Board-level design includes configurable jumpers (J2 for 3.3V power sourcing, J3 for A2/A1/A0 slave address selection), test points for SDA/SCL/OS signals, bypass capacitors (0.1 µF ceramic + 10 µF tantalum), and a 15-pin right-angle header (J1) for USB2ANY connection.

Key Specifications

Availability

LM75AEVM is available at Aetrix Electronics and suitable for thermal sensor validation, embedded temperature monitoring prototyping, and I²C interface development requiring stable component supply and full documentation traceability.

Supply support for LM75AEVM 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, embedded processing, and connectivity technologies, with decades of leadership in precision sensing and interface solutions.

The LM75AEVM belongs to TI's precision analog evaluation platform family, engineered specifically to accelerate development of digital temperature sensing subsystems using the LM75A sensor IC in industrial, computing, and communications equipment.

FAQ

What is the primary function of the LM75AEVM?

The LM75AEVM is an evaluation module that enables engineers to test and characterize the LM75A digital temperature sensor IC. It provides physical hardware, jumper-configurable I²C addressing, LabVIEW-based GUI software, and direct register access - allowing full validation of temperature measurement accuracy, OS interrupt response, and I²C communication timing without custom PCB design. The LM75AEVM itself contains no active logic beyond interfacing the LM75A to the USB2ANY bridge.

Does the LM75AEVM require an external power supply?

No, the LM75AEVM does not require an external power supply. It draws regulated 3.3V power directly from the USB2ANY interface board when J2 is shorted, eliminating need for separate voltage sources. On-board bypass capacitors (0.1 µF ceramic and 10 µF tantalum) ensure stable local decoupling for the LM75AIM/NOPB sensor during operation. The LM75AEVM is fully powered and functional once connected to a PC via USB2ANY.

How is the I²C slave address configured on the LM75AEVM?

The LM75AEVM uses a 3-pin jumper (J3) to set the A2, A1, and A0 address bits of the LM75A, enabling selection of any 7-bit slave address from 0x48 to 0x4F as defined in Table 2-2 of the SNVU209 User's Guide. Each jumper position corresponds to a logic level (HIGH or LOW) applied to the respective address pin. This allows multiple LM75AEVM units to coexist on the same I²C bus without address conflict - a key capability verified in the LM75AEVM hardware setup procedure.

What software is required to operate the LM75AEVM?

The LM75AEVM requires the official Texas Instruments LM75A evaluation software, distributed as a LabVIEW-based GUI application. It must be installed prior to connecting the USB2ANY board to the PC. The software provides three functional tabs: Registers (for read/write access to all LM75A registers), Graphing (for real-time temperature plotting and Excel export), and Control (for interactive OS threshold and hysteresis adjustment). The LM75AEVM relies entirely on this software stack for host interaction - no drivers or firmware updates are needed beyond standard HID enumeration.

Can the LM75AEVM be used for production-level thermal monitoring?

No, the LM75AEVM is strictly intended for engineering development, feasibility evaluation, and demonstration purposes - not for end-product deployment. It lacks regulatory certifications (e.g., UL, CE, FCC Class B), has no enclosure or safety isolation, and is not qualified for continuous operation in commercial or industrial environments. Its role is to de-risk integration of the LM75A sensor IC into final designs; actual production implementations must use the standalone LM75AIM/NOPB or equivalent in a certified system. The LM75AEVM User's Guide explicitly states it is "not considered by TI to be a finished end product fit for general consumer use."