Texas Instruments ADC34J23EVM

Overview

ADC34J23EVM from Texas Instruments is an evaluation module designed to assess the ADC34J23 - a quad-channel, 12-bit, JESD204B-compliant analog-to-digital converter with 80 MSPS sampling rate, 1.8-V single-supply operation, and onboard LMK04828 clock generator for synchronized SYSREF and multi-device timing alignment. It supports transformer-coupled differential analog inputs and JESD204B lane-based digital output via HSMC connector.

For engineers reviewing the ADC34J23EVM datasheet, ADC34J23EVM pinout, ADC34J23EVM application, or ADC34J23EVM equivalent, this page provides verified hardware configuration options, power supply routing details, USB-SPI GUI control capabilities, JESD204B lane setup guidance, and DC-coupling resistor swap instructions specific to channels B and C.

Technical Context

The ADC34J23EVM implements a dual-transformer analog input path for improved amplitude/phase balance across four channels, with default 50-Ω termination and support for both AC- and DC-coupled configurations. It integrates the LMK04828 clock conditioner to generate low-jitter ADC sampling clocks and SYSREF signals required for deterministic latency in JESD204B systems.

Power delivery uses a two-stage architecture: a TPS62080 buck converter steps 5 V down to 2.8 V and 4 V, followed by TPS7A4700 low-noise LDOs generating 1.8 V for the ADC and 3.3 V for the LMK04828 and CPLD. Jumpers JP9–JP10 and JP12–JP13 allow bypassing LDOs to use switched-mode outputs directly.

Key Specifications

Availability

ADC34J23EVM is available at Aetrix Electronics and suitable for high-speed data acquisition, communications infrastructure testing, radar prototype validation, and JESD204B system interoperability verification requiring stable component supply and full evaluation platform traceability.

Supply support for ADC34J23EVM 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 leader specializing in analog, embedded processing, and high-performance signal chain solutions, with decades of expertise in precision data converters and clocking subsystems.

The ADC34J23EVM belongs to TI's high-speed ADC evaluation platform family, engineered specifically to accelerate JESD204B-based system development for communications, test equipment, and defense applications demanding deterministic latency and multi-device synchronization.

FAQ

What is the primary function of the ADC34J23EVM?

The ADC34J23EVM is an evaluation module built to characterize and validate the ADC34J23 - a quad-channel, 12-bit, 80 MSPS JESD204B analog-to-digital converter. It provides complete signal chain support including analog input conditioning, clock generation via LMK04828, JESD204B lane output, and USB-SPI GUI control. The ADC34J23EVM enables rapid prototyping and performance verification of high-speed digitization systems before final PCB integration.

Does the ADC34J23EVM support DC-coupled analog inputs?

Yes, the ADC34J23EVM supports DC-coupled analog inputs on channels B and C only. This requires swapping specific surface-mount resistors (R137, R216, R225, R227–R228, R218, R232, R235) as documented in Table 7 of the SLAU579D user's guide. Channels A and D remain AC-coupled by design. The ADC34J23EVM does not support full quad-channel DC coupling.

Which clock sources are supported by the ADC34J23EVM?

The ADC34J23EVM supports two clock source modes: (1) onboard LMK04828-generated clock and SYSREF (default), accessible via DCLKOUT6P/N and DCLKOUT7P/N test points; and (2) external single-ended clock applied to EXT_ADC_CLK (J9). The LMK04828 ensures deterministic phase alignment critical for JESD204B multi-device synchronization - a key capability of the ADC34J23EVM.

How is the ADC34J23EVM powered and what are the voltage rails?

The ADC34J23EVM accepts 5 V via barrel jack J20 (3-A minimum). Internally, it generates 1.8 V for the ADC34J23 and USB interface using a TPS7A4700 LDO fed by a TPS62080 buck converter, and 3.3 V for the LMK04828 and CPLD using a second TPS7A4700 LDO. Jumpers JP9–JP10 and JP12–JP13 allow bypassing LDOs to use direct switcher outputs if noise sensitivity permits.

What software tools are compatible with the ADC34J23EVM?

The ADC34J23EVM is controlled exclusively via Texas Instruments' HSDC Pro GUI software, installed using the ADC3xxxx_Installer_vxpx package. The GUI provides tabbed register access for Common, ADC34Jxx, and LMK04828 configuration, real-time test pattern generation, gain/dither/chopper control, and JESD204B lane alignment diagnostics - all communicating over the Mini-USB (J18) interface to the onboard CPLD.