Texas Instruments ADS1672EVM

Overview

ADS1672EVM from Texas Instruments is a stand-alone evaluation module designed for the ADS1672 - a high-speed, single-channel, 24-bit, 625-kHz delta-sigma analog-to-digital converter. It provides full hardware support including onboard 20-MHz ceramic oscillator, REF5030/REF5025 voltage references, THS4520 differential driver, OPA211 reference buffer, and 3.3-V CMOS digital interface - enabling complete functional and performance validation of the ADS1672 in lab or prototyping environments.

For engineers reviewing the ADS1672EVM datasheet, ADS1672EVM pinout, ADS1672EVM application, or ADS1672EVM equivalent, this page delivers verified technical context, jumper- and switch-configurable digital control (SW1, W1–W4), analog input flexibility (J1/J2/P3), reference noise mitigation (<±1/2 LSB settling every 50 ns), and compatibility with TI's Modular EVM System and ADCPro™ software platform.

Technical Context

The ADS1672EVM implements a complete signal chain for the ADS1672 ADC: THS4520 drives differential inputs with 570-V/μs slew rate and 7-ns settling; REF5030 generates 3.0-V reference filtered by OPA211 and decoupled with 22-μF + 0.1-μF ceramics at VREFP/VREFN; anti-aliasing filter corner is 10.6 MHz (R = 20 Ω, C = 750 pF). Power is supplied via J4 with dedicated +5VA, +3.3VD, and AGND rails.

Digital control supports three modes: static configuration via SW1 DIP switch (10-position), GPIO-triggered START via P2.17/W4, or I²C-managed configuration using PCA9535 (U5, address 0x20). Only 3.3-V CMOS serial interface is supported - LVDS mode is explicitly disabled (SW1.6 fixed OFF).

Key Specifications

Availability

ADS1672EVM is available at Aetrix Electronics and suitable for high-precision data acquisition, sensor signal conditioning, and test equipment development requiring stable component supply, traceable sourcing, and long-term evaluation platform continuity.

Supply support for ADS1672EVM 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 headquartered in Dallas, Texas, delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The ADS1672EVM belongs to TI's precision data converter evaluation platform family, engineered to accelerate validation of high-resolution, high-speed delta-sigma ADCs in demanding measurement applications where noise floor, linearity, and timing integrity are critical.

FAQ

What is the primary function of the ADS1672EVM?

The ADS1672EVM is a dedicated evaluation module for the ADS1672 24-bit, 625-kHz delta-sigma ADC. It provides all necessary support circuitry - including THS4520 differential driver, REF5030/REF5025 references, OPA211 reference buffer, and configurable digital interface - to fully characterize the ADS1672's performance in real-world signal chains without custom design. The ADS1672EVM enables both standalone testing and integration with TI's ADCPro™ software via the MMB0 motherboard.

Does the ADS1672EVM support LVDS interface mode?

No, the ADS1672EVM does not support LVDS interface mode. Documentation explicitly states that the LVDS interface is not supported on this EVM, and SW1.6 must remain in the OFF position. The board implements only the standard 3.3-V CMOS serial interface, with signals including CS, CLKR, FSR, DRR, DRDY, and OTRD routed to the P2 connector. This limitation is hardware-enforced and cannot be overridden via firmware or jumper configuration.

How is the reference voltage stabilized for the ADS1672 on the ADS1672EVM?

The ADS1672EVM stabilizes the ADS1672 reference input using a multi-stage approach: the REF5030 generates a low-noise 3.0-V reference, which is buffered and further filtered by the OPA211 amplifier; 22-μF and 0.1-μF ceramic capacitors are placed directly at the ADS1672's VREFP and VREFN pins to suppress high-frequency noise. This design ensures the reference settles to within ±1/2 LSB every 50 ns - meeting the strict timing requirement imposed by the ADS1672's switched-capacitor reference architecture.

Can the ADS1672EVM operate without connection to a computer or MMB0?

Yes, the ADS1672EVM can operate as a stand-alone evaluation module. It accepts external power via J4 (+5VA, +3.3VD, AGND), analog input via J1/J2 or P3, and digital control via P2 (CS, START, CLKR) and SW1 switches. No host processor or software is required for basic operation. However, full feature access - such as dynamic configuration, data capture, and analysis - requires connection to the MMB0 motherboard and ADCPro™ software.

What clock sources are supported by the ADS1672EVM?

The ADS1672EVM supports two clock source options: an onboard 20-MHz ceramic oscillator (enabled by installing the W2 jumper across pins 1–2) or an external clock applied to J3 (requiring W2 removal and W3 repositioned to pins 2–3). The onboard oscillator feeds the ADS1672 through buffer U8; external clocks bypass this path. Both options drive the ADS1672's modulator clock input, and the EVM provides no frequency synthesis or division - clock rate directly determines ADC output data rate.