Texas Instruments ADS7924EVM

Overview

ADS7924EVM from Texas Instruments is a stand-alone evaluation module designed for the ADS7924 - a 12-bit, low-power, sampling analog-to-digital converter with I²C interface. It provides full access to all analog input channels (CH0–CH3), supports configurable power supplies (+5VA, +3.3VD, ±5V), and enables hardware-level control of ADC operation modes, sleep timing, interrupt behavior, and external buffer configuration via jumpers and switches.

For engineers reviewing the ADS7924EVM datasheet, ADS7924EVM pinout, ADS7924EVM application, or ADS7924EVM equivalent, this page delivers verified board-level specifications, jumper/switch default configurations, I²C address options (0x18/0x19), analog/digital ground isolation, and USB-powered MMB3 integration details required for rapid ADC characterization and firmware validation.

Technical Context

The ADS7924EVM implements direct, unbuffered signal routing from Samtec headers J1/J4 to the ADS7924's analog inputs (CH0–CH3), with optional OPA363 external buffer selectable via jumper J11. Its digital interface at J3 exposes I²C SCL_H/SDA pins compliant with 3.3V I²C rules, plus dedicated INT_H output and RST_H input - all mapped to corresponding ADS7924 device pins without level translation.

Power architecture supports dual-supply operation: analog rail (+5VA) and digital rails (+3.3VD, +1.8VD), with VDD and BVDD supplied through J7 jumpers and selected via S1/S2 switches. The board operates as a passive modular EVM - no onboard microcontroller - requiring external host control (e.g., MMB3 motherboard or custom MCU/DSP interface) for I²C communication and data acquisition.

Key Specifications

Availability

ADS7924EVM is available at Aetrix Electronics and suitable for precision sensor interface prototyping, industrial data acquisition system validation, and low-power ADC firmware development requiring stable component supply and full hardware configurability.

Supply support for ADS7924EVM 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 applications.

The ADS7924EVM belongs to TI's Modular Evaluation Module (EVM) System family - designed to accelerate ADC evaluation through standardized mechanical/electrical interfaces, jumper-configurable operation, and seamless integration with ADCPro software and MMB3 host platforms.

FAQ

What is the primary function of the ADS7924EVM?

The ADS7924EVM is a hardware evaluation platform for the ADS7924 12-bit I²C ADC. It provides physical access to all analog inputs (CH0–CH3), digital control signals (I²C, INT_H, RST_H), and configurable power/ground paths - enabling engineers to validate signal integrity, test firmware I²C drivers, characterize conversion accuracy, and verify timing behavior before integrating the ADS7924 into final designs. The ADS7924EVM itself contains no active logic or software.

How does the ADS7924EVM connect to a host system?

The ADS7924EVM connects to a host system via its J3 header (3.3V CMOS/I²C interface) or through the MMB3 motherboard included in the ADS7924EVM-PDK kit. When used with MMB3, the ADS7924EVM communicates over USB using virtual COM port drivers and ADCPro software. As a stand-alone board, it requires an external I²C master (e.g., MCU, DSP, or FPGA) connected to J3 pins SCL_H, SDA, INT_H, and RST_H - with proper level matching and pull-up resistors.

What are the default jumper and switch settings on the ADS7924EVM?

Factory defaults include: J5.1–J5.2 connected (I²C address = 0x18), J6.1–J5.2 connected (AGND–DGND link), J7.1–J7.2 and J7.3–J7.4 connected (VDD and BVDD enabled), J7.5–J7.6 and J7.7–J7.8 connected (AGND/DGND grounding), J11.1–J11.3 and J11.2–J11.4 connected (external OPA363 buffer enabled), S1 set left (+5VA for VDD), and S2 set center (+3.3VD for BVDD). These settings ensure immediate operation with standard analog inputs and I²C hosts.

Can the ADS7924EVM operate without the MMB3 motherboard?

Yes - the ADS7924EVM functions independently as a passive evaluation board. It requires no firmware or onboard processing. To operate without the MMB3, users must provide external I²C master control, analog signal sources, and appropriate power supplies (+5VA, +3.3VD) routed through J2 and configured via S1/S2 switches and J7 jumpers. All configuration (address, mode, alarms) is performed via I²C register writes - not onboard controls.

What software tools are supported for the ADS7924EVM?

The ADS7924EVM is fully supported by Texas Instruments' ADCPro™ software when used with the MMB3 motherboard (as part of the ADS7924EVM-PDK). ADCPro provides real-time data acquisition, FFT/scope/histogram analysis, and full register-level control of the ADS7924 via its plug-in interface. Stand-alone use requires custom I²C host software - no TI-provided GUI is available for direct J3 connection without MMB3.