Texas Instruments ADC3422EVM

Overview

ADC3422EVM from Texas Instruments is an evaluation module designed to characterize the ADC3422 - a quad-channel, 12-bit, 50 MSPS serial LVDS-output analog-to-digital converter. It supports transformer-coupled single-ended or differential analog inputs, onboard 1.8-V LDO power regulation, and SPI-based GUI control via Mini-USB. The EVM enables performance validation in high-speed data acquisition systems requiring precise timing and low-noise sampling.

For engineers reviewing the ADC3422EVM datasheet, ADC3422EVM pinout, ADC3422EVM application, or ADC3422EVM equivalent, this page delivers verified hardware configuration options, jumper-controlled power paths, clock input circuit details, DC/AC coupling flexibility, and HSDC Pro software integration guidance specific to the ADC3422 device family.

Technical Context

The ADC3422EVM implements a dual-transformer analog input path for improved amplitude and phase balance across all four channels, with default 50-Ω termination formed by paired 25-Ω resistors referenced to VCM. It accepts single-ended clock input via SMA, conditioned through a 1:4 impedance-ratio transformer to boost amplitude and match source impedance.

Power is derived from a 5-V input using a TPS62080 buck converter and TPS7A4700 low-noise LDOs - delivering regulated 1.8 V to the ADC and USB interface. Jumper-selectable configurations allow bypassing the LDO to use the switcher directly, with feedback resistor adjustments required per schematic documentation.

Key Specifications

Availability

ADC3422EVM is available at Aetrix Electronics and suitable for high-speed test equipment, communications infrastructure prototyping, and radar signal chain development requiring stable component supply and full evaluation platform traceability.

Supply support for ADC3422EVM 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, specializing in analog, embedded processing, and high-performance data conversion technologies.

The ADC3422EVM belongs to TI's high-speed ADC evaluation platform family, engineered to accelerate design-in of the ADC3xxx series in applications demanding wide dynamic range, low jitter sensitivity, and flexible digital output formatting.

FAQ

What is the primary function of the ADC3422EVM?

The ADC3422EVM is a dedicated evaluation module for the ADC3422 analog-to-digital converter. It provides a complete hardware platform-including analog input conditioning, clock interface, regulated power delivery, and USB-based SPI control-to validate the performance of the quad-channel, 12-bit, 50 MSPS ADC3422 under real-world signal conditions. The ADC3422EVM does not operate as a standalone data acquisition system but serves exclusively as a characterization tool for the ADC3422 IC.

Does the ADC3422EVM support JESD204B interface operation?

No, the ADC3422EVM is specifically designed for the sLVDS-output ADC3422 and does not support JESD204B. It lacks the LMK04828 clock generator and associated SERDES lane routing found on ADC34JxxEVM variants. The ADC3422EVM uses two independent 2-wire LVDS interfaces per channel pair (eight total p/n pairs), configured for 6× or 12× serialization depending on bit resolution-distinct from the JESD204B lane architecture used by ADC34J22 or ADC34J42 devices.

How is DC-coupling enabled on the ADC3422EVM?

DC-coupling on the ADC3422EVM requires swapping specific surface-mount resistors on the top side of the board near the baluns: install R137, R216, R225, R227, R228, R218, R232, and R235 while removing R217, R258, R226, R219, R233, and R234. This reconfiguration routes the amplifier outputs directly to the ADC inputs without AC-blocking capacitors. The THS4541RGT driver amplifiers are pre-installed on ADC34JxxEVMs but not on the ADC3422EVM - DC-coupling is not supported for ADC3422EVM without additional amplifier hardware modification.

What software is used to control the ADC3422EVM?

The ADC3422EVM is controlled using Texas Instruments' HSDC Pro GUI software, installed via the ADC3xxxx_Installer_vxpx package. The software communicates over Mini-USB (J14) using SPI protocol routed through an onboard CPLD. It provides tabbed register access-including Common, ADC34xx, and advanced custom registers-for configuring sampling mode, gain, dither, chopper, test patterns, and LVDS output swing. The ADC3422EVM does not support direct JTAG or FMC-based control.

Can the ADC3422EVM be powered from sources other than the 5-V barrel jack?

The ADC3422EVM is designed for 5-V input only via the J15 barrel connector. While the onboard TPS62080 buck converter and TPS7A4700 LDOs generate internal 1.8-V and 4-V rails, there are no alternative power entry points (e.g., test points, headers, or USB power injection) validated for operation. Attempting to power the ADC3422EVM from any other source may damage the board or invalidate performance measurements. The 5-V supply must deliver ≥3 A and maintain ±5% regulation during full-channel sampling.