Texas Instruments ADC34J24EVM

Overview

ADC34J24EVM from Texas Instruments is an evaluation module designed to characterize the ADC34J24 - a quad-channel, 12-bit, JESD204B-compliant analog-to-digital converter with 125 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 USB-based SPI control via HSDC Pro GUI.

For engineers reviewing the ADC34J24EVM datasheet, ADC34J24EVM pinout, ADC34J24EVM application, or ADC34J24EVM equivalent, this page provides verified hardware configuration options, JESD204B lane setup guidance, DC-coupling resistor swap instructions, onboard power supply selection (LDO vs. DC/DC), and software-controlled register access for ADC34J24-specific features including dither, chopper, gain, and test pattern generation.

Technical Context

The ADC34J24EVM implements a full-featured signal chain for evaluating the ADC34J24, featuring four independent SMA analog input paths with dual-transformer coupling, onboard LMK04828 clock synthesizer supporting JESD204B subclass 1 timing, and configurable 1.8-V ADC core supply (LDO or TPS62080 switcher). It uses an HSMC connector for high-speed data capture with TI's TSW14J56 and supports both AC- and DC-coupled input modes via resistor swaps on channels B and C.

Power architecture includes dual low-noise LDOs (TPS7A4700) deriving 1.8 V for the ADC and 3.3 V for the LMK04828 from a 5-V input, with jumper-selectable bypass of LDOs to enable direct DC/DC supply routing. The board integrates status LEDs for power (D8), LMK lock (D3/D4), JESD SYNC (D5), and clock source selection (D1/D2).

Key Specifications

Availability

ADC34J24EVM is available at Aetrix Electronics and suitable for high-speed data acquisition, radar front-end prototyping, and communications receiver development requiring stable component supply, traceable sourcing, and long-term evaluation platform continuity.

Supply support for ADC34J24EVM 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 and embedded processing solutions across industrial, automotive, and communications markets.

The ADC34J24EVM belongs to TI's high-speed data converter evaluation platform family, engineered specifically to accelerate validation of JESD204B-based ADCs in demanding RF-sampling and wideband receiver applications.

FAQ

What is the primary purpose of the ADC34J24EVM?

The ADC34J24EVM is a dedicated evaluation module for the ADC34J24 quad-channel, 12-bit, 125 MSPS JESD204B ADC. It provides complete signal conditioning, clock generation (via LMK04828), power regulation, and USB-based SPI control to enable rapid characterization of dynamic performance, timing alignment, and JESD204B link integrity. Engineers use ADC34J24EVM to validate system-level integration before committing to custom PCB design.

Does the ADC34J24EVM support DC-coupled analog inputs?

Yes - the ADC34J24EVM supports DC-coupled operation on channels B and C only, implemented by 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 default. This configuration enables baseband signal evaluation without transformer limitations.

Which clocking architecture does the ADC34J24EVM use for JESD204B compliance?

The ADC34J24EVM uses the onboard LMK04828 ultra-low-jitter clock generator to provide synchronized sampling clock and SYSREF signals required for JESD204B subclass 1 operation. The LMK04828 is configured via SPI through the CPLD and supports deterministic latency control, essential for multi-ADC synchronization. External clock injection via EXT_ADC_CLK (J9) is also supported.

How is the ADC34J24EVM powered, and what are the voltage rail options?

The ADC34J24EVM accepts 5 V via barrel jack J20. Internally, it generates 1.8 V for the ADC34J24 using either the TPS7A4700 LDO (default) or the TPS62080 buck converter (jumper-selectable via JP9/JP10), and 3.3 V for the LMK04828 using another TPS7A4700 LDO (default) or TPS62080-derived rail (jumper-selectable via JP12/JP13). All configurations maintain low-noise performance critical for ADC testing.

Can the ADC34J24EVM be used with TI's TSW14J56 data capture card?

Yes - the ADC34J24EVM connects directly to the TSW14J56 via its HSMC connector (J13A/B), enabling real-time JESD204B data capture and analysis using TI's HSDC Pro software. The interface supports all four JESD204B lanes from the ADC34J24, and the onboard LMK04828 ensures proper SYSREF phasing and link initialization required for reliable multi-lane capture.