Texas Instruments ADS1247EVM

Overview

ADS1247EVM from Texas Instruments is a stand-alone evaluation module designed for the ADS1247 - a 24-bit, multi-channel, delta-sigma analog-to-digital converter (ADC) with integrated PGA, reference, and system monitoring. It supports ±2.5V or +5V analog supply, onboard 2.048V buffered reference, GPIO access, and full SPI/I²C digital interface. Engineers use it to validate high-precision sensor signal chains in industrial process control and weigh-scale applications.

For engineers reviewing the ADS1247EVM datasheet, ADS1247EVM pinout, ADS1247EVM application, or ADS1247EVM equivalent, this page delivers verified hardware interface details, jumper and switch configurations, analog/digital I/O mapping, power architecture, and integration guidance with TI's Modular EVM System and MMB3 motherboard.

Technical Context

The ADS1247EVM implements the complete analog front-end and digital control infrastructure required to operate the ADS1247 ADC without embedded firmware. It provides dual-row Samtec headers (J4, J8) for direct analog input access (AIN0–AIN3), differential reference inputs (REF+, REF−), and AGND/DGND separation per TI's noise-sensitive layout guidelines.

Digital interface is exposed via 20-pin Samtec header J7 supporting 3.3V CMOS SPI (CS, SCLK, DIN, DOUT/DRDY) and I²C (SCL, SDA), with configurable pull-ups and dedicated GPIO pins (START, MR, PWRSEL, CLK Select). Clocking defaults to the ADS1247's internal oscillator, but provisions exist for external crystal (U8 footprint) or processor-driven clock on TOUT (J7.17).

Key Specifications

Availability

ADS1247EVM is available at Aetrix Electronics and suitable for industrial sensor interface prototyping, precision weigh-scale development, and high-resolution data acquisition systems requiring stable component supply and long-term design-in support.

Supply support for ADS1247EVM 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 silicon solutions for industrial, automotive, and communications markets.

The ADS1247EVM belongs to TI's precision data converter evaluation platform family, engineered to accelerate validation of high-accuracy, low-noise ADC subsystems in demanding measurement applications.

FAQ

What is the ADS1247EVM used for?

The ADS1247EVM is a hardware evaluation module designed exclusively to characterize and validate the ADS1247 - a 24-bit delta-sigma ADC with integrated PGA, reference, and system monitors. It enables engineers to test analog input performance, digital interface timing, reference stability, and power supply behavior under real-world conditions before final PCB design. The ADS1247EVM itself contains no microcontroller and requires an external host (e.g., MMB3 or custom controller) to drive the ADS1247.

Does the ADS1247EVM include firmware or software?

No, the ADS1247EVM is a passive evaluation board with no onboard firmware or executable code. It relies entirely on an external host controller (e.g., MMB3 motherboard) or user-designed interface to communicate with the ADS1247 IC. Software support is provided separately via TI's ADCPro™ evaluation suite and the ADS1247EVM-PDK plug-in, which run on Windows XP and manage configuration, data capture, and analysis - but those tools do not reside on the ADS1247EVM hardware itself.

How is the ADS1247EVM powered?

The ADS1247EVM accepts power through J3: +5VA (required), –5VA (required only in bipolar mode), +3.3VD (required), AGND, and DGND. When used standalone, external bench supplies must be connected. In the ADS1247EVM-PDK configuration, power is delivered entirely via USB from the MMB3 motherboard, which generates +5VA, –5VA, and +3.3VD internally. Jumper J10 rows 1–6 must be shorted for normal operation to route supply currents through measurement points.

Can the ADS1247EVM operate without the MMB3 motherboard?

Yes, the ADS1247EVM functions as a fully independent evaluation board and does not require the MMB3. It can be interfaced directly with any SPI/I²C-capable host - such as a microcontroller, FPGA, or DSP evaluation board - using the J4, J7, and J8 connectors. However, the MMB3 is required only when using TI's ADCPro software stack and USB-based evaluation workflow; the ADS1247EVM itself has no USB interface or native PC connectivity.

What reference options does the ADS1247EVM support?

The ADS1247EVM supports two primary reference configurations: (1) onboard 2.048V buffered reference (U1/U2), selectable via S1 switch position "BUFF", or (2) external differential reference applied to J8.20 (REF+) and J8.18 (REF−). The internal ADS1247 reference is also accessible at test points TP3 (Int REF) and TP5 (REFCOM). S1 must never be set to AVDD, as that violates the ADS1247's reference input voltage specification.