Texas Instruments ADS1282EVM

Overview

ADS1282EVM from Texas Instruments is a stand-alone evaluation module designed for the ADS1282 - a high-performance, 32-bit, delta-sigma analog-to-digital converter with two differential input channels, integrated PGA, and programmable data rate up to 4 kSPS. It supports unipolar/bipolar operation, onboard 4.096 MHz crystal oscillator, and flexible reference options (REF5050-based 5 V or external differential). It enables full functional and performance validation of the ADS1282 in precision measurement systems.

For engineers reviewing the ADS1282EVM datasheet, ADS1282EVM pinout, ADS1282EVM application, or ADS1282EVM equivalent, this page delivers verified interface configurations, power architecture details, analog/digital signal routing, jumper-controlled mode selection, and integration guidance for ADCPro software and MMB0 motherboard compatibility.

Technical Context

The ADS1282EVM implements direct connection between test signals and the ADS1282's analog inputs via OPA1632 buffer stages, with VCOM fixed at 2.5 V from REF5025. Its digital interface provides native SPI and I²C access through J5, supporting both hardware GPIO control (e.g., PDWN on J5.14, DRDY on J5.9/J5.15) and I²C-based configuration via PCA9535 port expander (U7).

Power architecture separates analog (+VA/–VA, +5VA/–5VA) and digital (+3.3VD, +1.8VD) domains with dedicated ground planes (AGND/DGND), and supports dual-mode operation: unipolar (±5 V analog supply) or bipolar (±10 V analog supply + optional –5 V). Clocking is selectable between onboard 4.096 MHz crystal or external processor-driven clock via J5.17 (TOUT).

Key Specifications

Availability

ADS1282EVM is available at Aetrix Electronics and suitable for precision sensor interface development, seismic data acquisition prototyping, high-resolution weigh-scale design, and laboratory-grade instrumentation requiring stable component supply and full-featured evaluation capability.

Supply support for ADS1282EVM 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 data conversion technologies, with decades of leadership in precision ADC design and evaluation platforms.

The ADS1282EVM belongs to TI's Modular EVM System family, engineered specifically to accelerate evaluation and system integration of high-accuracy delta-sigma ADCs like the ADS1282 in geophysical, structural monitoring, and metrology applications.

FAQ

What is the primary function of the ADS1282EVM?

The ADS1282EVM is a dedicated evaluation module for the ADS1282 32-bit delta-sigma ADC. It provides complete hardware access to all analog and digital pins, configurable power and reference paths, and jumper-selectable operating modes. The ADS1282EVM does not contain a microprocessor and must be interfaced with an external controller or MMB0 motherboard to operate - its sole purpose is to enable accurate, repeatable characterization of the ADS1282 under real-world signal and supply conditions.

Does the ADS1282EVM include an onboard clock source?

Yes, the ADS1282EVM integrates a 4.096 MHz crystal oscillator that directly drives the ADS1282's master clock input. This oscillator is enabled by default when jumper J3 is set to the DVDD position. Alternatively, the ADS1282EVM supports external clock injection via J5.19 (EXTCLK) or J5.17 (TOUT), allowing synchronization with host processors or other timing sources - a key capability confirmed in Section 7 of the SBAU144D user's guide for the ADS1282EVM.

How is the voltage reference configured on the ADS1282EVM?

The ADS1282EVM offers dual reference paths: an onboard REF5050 (U1) delivering 5.0 V for unipolar mode, and external differential reference input via J6.18 (REF–) and J6.20 (REF+). Switch S1 selects between these sources. When S1 is left-positioned (factory default), the REF5050 supplies the reference; when right-positioned, external reference is used. Jumper J1 further configures internal reference grounding to yield 2.5 V in bipolar mode - all verified in Sections 5 and 8.1 of the official user's guide.

Can the ADS1282EVM operate without the MMB0 motherboard?

Yes, the ADS1282EVM functions as a stand-alone PCB and can be integrated into custom systems using direct SPI or I²C connections via J5. It requires external digital control (e.g., MCU/FPGA), analog signal sources applied to J6, and appropriate ±10 V/±5 V/3.3 V power supplies delivered to J8. While the ADS1282EVM-PDK kit bundles it with the MMB0 and ADCPro software, the ADS1282EVM itself has no dependency on the MMB0 - a fact explicitly stated in Section 1.2 of the SBAU144D document.

What software tools are required to use the ADS1282EVM?

To fully leverage the ADS1282EVM, Texas Instruments' ADCPro™ software and the ADS1282EVM-PDK plug-in are required. These tools run exclusively on Windows XP and depend on NI-VISA and USBStyx drivers for communication. The ADS1282EVM-PDK package includes the plug-in installer (ads1282evm-pdk-plugin-1.0.0.exe); standalone use with custom firmware requires only SPI/I²C protocol implementation - no TI software is mandatory for basic hardware evaluation of the ADS1282EVM.