Texas Instruments ADS1248V2EVM-PDK

Overview

ADS1248V2EVM-PDK from Texas Instruments is a fully assembled evaluation module designed to accelerate development and validation of precision temperature sensing systems using the 24-bit ADS1248 delta-sigma ADC. It supports thermocouple, RTD, and thermistor measurements with integrated biasing, programmable gain, internal 2.048-V reference, dual IDACs, and SPI interface - all accessible via USB-connected PAMBoard and web-based GUI.

For engineers reviewing the ADS1248V2EVM-PDK datasheet, ADS1248V2EVM-PDK pinout, ADS1248V2EVM-PDK application, or ADS1248V2EVM-PDK equivalent, this EVM provides hardware-ready signal conditioning, configurable voltage reference options (internal, REF5025, ratiometric, external), jumper-selectable AVDD (3.3 V/5 V), and terminal-block-based sensor interfacing - enabling rapid prototyping without custom PCB design.

Technical Context

The ADS1248V2EVM-PDK functions as a plug-in daughterboard for the PAMBoard motherboard, which serves as a USB-to-SPI bridge and supplies regulated 3.3-V DVDD and selectable 3.3-V/5-V AVDD. It routes analog inputs through RC-filtered screw terminals (J5/J6) to the ADS1248's AIN0–AIN7 pins and supports cold-junction compensation via on-board thermistor circuitry.

Digital control is implemented via SPI (CS, SCLK, DIN, DOUT/DRDY) and GPIO-triggered conversion start, with configuration managed through a browser-based GUI that reads/writes ADS1248 registers, captures time-domain/histogram data, and displays real-time statistics - all without requiring local software installation beyond TI Cloud Agent.

Key Specifications

Availability

ADS1248V2EVM-PDK is available at Aetrix Electronics and suitable for precision temperature measurement development, industrial sensor calibration, RTD/thermocouple system validation, and embedded ADC integration requiring stable component supply and full evaluation support.

Supply support for ADS1248V2EVM-PDK 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 high-performance analog ICs for industrial, automotive, and communications applications.

The ADS1248V2EVM-PDK belongs to TI's precision data acquisition evaluation platform family, engineered specifically to demonstrate and simplify implementation of high-resolution delta-sigma ADCs in temperature-sensing applications with minimal external components.

FAQ

What is the role of the PAMBoard when using the ADS1248V2EVM-PDK?

The PAMBoard acts as a mandatory USB-to-SPI communication bridge for the ADS1248V2EVM-PDK. It provides regulated 3.3-V DVDD and selectable 3.3-V/5-V AVDD, handles SPI protocol translation, and relays commands/data between the web-based GUI and the ADS1248V2EVM-PDK. Without the PAMBoard, the ADS1248V2EVM-PDK cannot operate - it lacks onboard USB interface or power regulation.

Can the ADS1248V2EVM-PDK be used without the TI Cloud Agent and browser extension?

No - the ADS1248V2EVM-PDK requires the TI Cloud Agent application and a supported browser extension (Chrome or Firefox) to establish secure, low-latency communication between the web GUI and the PAMBoard. This architecture eliminates local software installation but mandates the cloud agent for USB device enumeration and SPI command routing to the ADS1248V2EVM-PDK.

Does the ADS1248V2EVM-PDK support all ADS1248 features documented in the SBAS426 datasheet?

Yes - the ADS1248V2EVM-PDK exposes all core ADS1248 functionality including 24-bit delta-sigma conversion, eight-channel MUX, PGA (1×–128×), internal 2.048-V reference, dual IDACs, burn-out current sources, and system monitoring registers. All features are accessible via the GUI's Register Map tab and Data Capture controls, matching the ADS1248's documented register set and timing behavior.

How does the ADS1248V2EVM-PDK handle cold-junction compensation (CJC) for thermocouples?

The ADS1248V2EVM-PDK implements CJC using an on-board thermistor connected to J5 (NTC±), with copper pour areas beneath the terminal block providing thermal coupling to the ambient environment. The thermistor voltage is digitized by the ADS1248, and the GUI applies standard NIST ITS-90 polynomial conversion to derive junction temperature - enabling accurate thermocouple readings without external sensors or calibration routines.

Is the ADS1248V2EVM-PDK compatible with the ADS1148 or only the ADS1248?

The ADS1248V2EVM-PDK is functionally compatible with both the 24-bit ADS1248 and 16-bit ADS1148, as confirmed by TI's unified ADS1x48EVM documentation. Hardware connections, jumper configurations, terminal block mappings, and GUI functionality are identical across both devices - allowing users to evaluate either ADC variant using the same ADS1248V2EVM-PDK board and software stack.