Texas Instruments ADC34J44EVM

Overview

ADC34J44EVM from Texas Instruments is a quad-channel, 14-bit, JESD204B-compliant analog-to-digital converter evaluation module supporting up to 125 MSPS sampling rate. It integrates the ADC34J44 IC, onboard LMK04828 clock generator, transformer-coupled differential input circuitry, and USB-based SPI control interface for rapid ADC characterization in high-speed data acquisition systems.

For engineers reviewing the ADC34J44EVM datasheet, ADC34J44EVM pinout, ADC34J44EVM application, or ADC34J44EVM equivalent, this page delivers verified hardware configuration options, JESD204B lane setup guidance, DC/AC coupling resistor swap instructions, power supply jumper settings, and HSDC Pro GUI integration details essential for lab validation and system-level prototyping.

Technical Context

The ADC34J44EVM implements a full-featured evaluation platform for the ADC34J44 - a quad-channel, 14-bit, 125 MSPS JESD204B subclass 1 ADC with two lanes per channel (four total lanes), internal SYSREF synchronization, and support for harmonic clocking via programmable input clock dividers. It uses an onboard LMK04828 clock conditioner to generate low-jitter ADC sampling clocks and SYSREF signals.

Power architecture includes dual-output DC/DC switching regulators (TPS62080) feeding low-noise LDOs (TPS7A4700) to deliver clean 1.8-V ADC core voltage and 3.3-V LMK04828 supply. Input signal conditioning employs dual 1:1 transformers for amplitude/phase-balanced differential drive, with configurable 50-Ω termination and Nyquist zone selection.

Key Specifications

Availability

ADC34J44EVM is available at Aetrix Electronics and suitable for high-speed test equipment, radar front-end prototyping, communications transceiver development, and medical imaging subsystem validation requiring stable component supply and full evaluation infrastructure.

Supply support for ADC34J44EVM 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 over 90 years of innovation in precision electronics.

The ADC34J44EVM belongs to TI's high-speed data converter evaluation platform family, designed specifically to accelerate time-to-validation for JESD204B-based multichannel ADC systems in defense, 5G infrastructure, and scientific instrumentation.

FAQ

What is the primary function of the ADC34J44EVM?

The ADC34J44EVM is a dedicated evaluation module for the ADC34J44 quad-channel, 14-bit, 125 MSPS JESD204B analog-to-digital converter. It provides complete signal chain infrastructure-including transformer-coupled inputs, onboard LMK04828 clock generation, configurable power paths, and USB-SPI control-to enable lab-based performance verification, timing alignment testing, and JESD204B link bring-up for the ADC34J44 device.

Does the ADC34J44EVM support DC-coupled analog inputs?

Yes, the ADC34J44EVM supports DC-coupled operation on channels B and C via a documented resistor swap (R137, R216, R225, R227–R228, R218, R232, R235 installed; R217, R258, R226, R219, R233, R234 removed). This modification replaces AC-coupling capacitors with direct-path routing while preserving common-mode voltage integrity, enabling baseband signal capture without frequency translation.

Which software tools are compatible with the ADC34J44EVM?

The ADC34J44EVM is fully supported by Texas Instruments' HSDC Pro GUI software, which provides register-level control, real-time FFT analysis, JESD204B lane monitoring, SYSREF alignment diagnostics, and test pattern generation. The GUI includes dedicated ADC34Jxx tabs for configuring dither, chopper, gain, and clock divider settings specific to the ADC34J44 device mounted on the ADC34J44EVM.

How is clocking implemented on the ADC34J44EVM?

The ADC34J44EVM uses an onboard LMK04828 clock conditioner as its primary clock source, generating low-jitter sampling clocks and synchronized SYSREF signals for the ADC34J44. External clocking is also supported via the EXT_ADC_CLK SMA connector. The LMK04828 enables precise phase alignment between sampling clock and SYSREF-critical for deterministic latency in JESD204B subclass 1 operation on the ADC34J44EVM.

What power supply options does the ADC34J44EVM offer?

The ADC34J44EVM accepts 5-V input via barrel jack and provides dual power paths: default LDO-based regulation (TPS7A4700) for ultra-low noise 1.8-V ADC core and 3.3-V LMK04828 supplies, or switcher-based regulation (TPS62080) for higher efficiency. JP9, JP10, JP12, and JP13 jumpers select between LDO and switcher modes, with feedback resistors (R152, R163) required when enabling switcher outputs on the ADC34J44EVM.