Texas Instruments ADS1148EVM-PDK

Overview

ADS1148EVM-PDK from Texas Instruments is an evaluation module designed to accelerate development of precision sensor measurement systems using the ADS1148 16-bit, 2-kSPS delta-sigma ADC with integrated PGA, dual matched IDACs, 8-channel analog multiplexer, burn-out detection, and internal 2.048-V reference. It supports RTD, thermocouple, and bridge sensor interfacing in industrial process control and factory automation.

For engineers reviewing the ADS1148EVM-PDK datasheet, ADS1148EVM-PDK pinout, ADS1148EVM-PDK application, or ADS1148EVM-PDK equivalent, this module enables rapid validation of ADS1148 configuration, SPI interface timing, excitation current sourcing, GPIO-controlled sensor biasing, and simultaneous 50/60-Hz rejection at 20 SPS - critical for high-accuracy temperature and pressure measurement designs.

Technical Context

The ADS1148EVM-PDK implements a complete signal chain reference design centered on the ADS1148 IC, including configurable analog front-end routing (via solder jumpers and DIP switches), buffered reference outputs (VREFOUT/VREFCOM), dual 50–1500 µA programmable IDACs, and dedicated burn-out current sources (0.5/2/10 µA). It provides direct access to all 28 TSSOP pins and supports both unipolar (2.7–5.25 V) and bipolar (±2.5 V) analog supply configurations.

Hardware features include on-board temperature sensor monitoring, AVDD/DVDD/VREF supply supervision, system-level self-calibration support via jumper-selectable modes, and SPI interface compatibility with TI's Code Composer Studio™ and GUI-based evaluation software. The board integrates discrete decoupling (0.1 µF AVDD–AVSS, 1 µF–47 µF VREFOUT–VREFCOM) per ADS1148 layout guidelines.

Key Specifications

Availability

ADS1148EVM-PDK is available at Aetrix Electronics and suitable for industrial process control, factory automation, and precision temperature measurement applications requiring stable component supply, full evaluation hardware traceability, and long-term design-in support.

Supply support for ADS1148EVM-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 delivering analog and embedded processing solutions, with leadership in precision data converters, power management, and industrial interface technologies.

The ADS1148EVM-PDK belongs to TI's Precision ADC Evaluation Platform family, engineered specifically to de-risk sensor signal chain development for high-accuracy industrial measurement applications - emphasizing ease of configuration, calibration transparency, and real-world noise immunity validation.

FAQ

What is the primary function of the ADS1148EVM-PDK?

The ADS1148EVM-PDK is a purpose-built evaluation module that enables hardware and firmware validation of the ADS1148 16-bit delta-sigma ADC in sensor measurement systems. It provides immediate access to all ADS1148 features - including its 8-channel analog multiplexer, dual programmable IDACs, burn-out detection, internal voltage reference, and SPI interface - allowing engineers to prototype, characterize, and optimize precision analog front-ends without custom PCB design. The ADS1148EVM-PDK includes jumpers, test points, and documentation aligned directly with the ADS1148 datasheet.

Does the ADS1148EVM-PDK support both unipolar and bipolar analog supply configurations?

Yes, the ADS1148EVM-PDK supports both unipolar (AVSS = 0 V, AVDD = 2.7–5.25 V) and bipolar (AVSS = –2.5 V, AVDD = +2.5 V) analog supply operation as specified for the ADS1148 IC. The board includes dedicated screw terminals and solder jumpers to configure AVSS and AVDD independently, along with appropriate decoupling (0.1 µF ceramic between AVDD and AVSS) per ADS1148 layout recommendations. This flexibility allows direct evaluation of thermocouple or bridge sensor interfaces requiring true bipolar input ranges.

Can the ADS1148EVM-PDK be used to evaluate RTD measurements with 4-wire configuration?

Yes, the ADS1148EVM-PDK supports 4-wire RTD evaluation through its dual matched IDACs (IEXC1/IEXC2), 8-channel analog multiplexer, and dedicated burn-out detection circuitry. Users can route IDAC1 to RTD high-side and IDAC2 to low-side while selecting corresponding AINx inputs for Kelvin sensing; GPIO pins allow control of external relay or switch matrices. The ADS1148EVM-PDK's layout and jumper options maintain signal integrity for ratiometric measurements, and its internal 2.048-V reference ensures stable excitation-to-reference tracking - essential for sub-0.1°C RTD accuracy.

How does the ADS1148EVM-PDK handle 50-Hz and 60-Hz line interference rejection?

The ADS1148EVM-PDK leverages the ADS1148's built-in digital filter architecture to deliver simultaneous 50-Hz and 60-Hz rejection at data rates of 20 SPS or lower - no external hardware or firmware filtering required. This is achieved via a third-order modulator and programmable sinc3 filter with notch frequencies precisely aligned to both AC line frequencies. The ADS1148EVM-PDK exposes filter configuration registers via SPI, enabling users to verify rejection depth (>100 dB typical) and settle time (<100 ms) under real-world EMI conditions, directly supporting compliance with IEC 61000-4-8 magnetic field immunity requirements.

Is software and GUI support provided with the ADS1148EVM-PDK?

Yes, the ADS1148EVM-PDK is fully supported by Texas Instruments' ADS1x48 GUI software, which runs on Windows and communicates via USB-to-SPI adapter (included or optional). The GUI enables real-time register configuration, live waveform plotting, noise histogram analysis, calibration sequence execution (self/system), and export of captured data to CSV. Firmware examples for MSP430 and C2000 microcontrollers are also available, ensuring the ADS1148EVM-PDK delivers end-to-end validation - from hardware bring-up to production firmware integration - for the ADS1148 device.