Texas Instruments ADS5474EVM-CVAL

Overview

ADS5474EVM-CVAL from Texas Instruments is a high-speed analog-to-digital converter (ADC) evaluation module designed to assess the ADS5474-SP 14-bit, 400-MSPS radiation-hardened ADC under real-world signal, clock, and supply conditions. It supports differential analog input via SMA connectors, LVDS digital output through a Samtec QTH-060-02-F-D-A header, and flexible power delivery via banana jacks for 5-V analog, 3.3-V analog, and 3.3-V digital supplies.

For engineers reviewing the ADS5474EVM-CVAL datasheet, ADS5474EVM-CVAL pinout, ADS5474EVM-CVAL application, or ADS5474EVM-CVAL equivalent, this EVM enables rapid validation of high-frequency sampling performance, clock jitter sensitivity, SNR/SFDR trade-offs, and layout-dependent signal integrity in space-grade data acquisition systems.

Technical Context

The ADS5474EVM-CVAL implements dual analog input paths: one transformer-coupled (MACOM ETC1-1-13 balun) and one active (THS9000 amplifier-based), both converting single-ended sources to differential signals for the ADS5474-SP. Clock conditioning uses a Coilcraft WBC4-1W transformer to convert single-ended 500-MHz max input into differential CLK±.

Digital output conforms to LVDS standards with 80-pin parallel interface (J5), supporting DDR-mode DRY clock latching. The board features dedicated test points (e.g., TP1 for VREF monitoring), jumper-configurable device selection (JP20 for ADS5474 vs. ADS5463/ADS5444), and power-down control via J21 for the ADS5474-specific pin 35.

Key Specifications

Availability

ADS5474EVM-CVAL is available at Aetrix Electronics and suitable for aerospace instrumentation, satellite telemetry receivers, radar front-end prototyping, and radiation-tolerant test equipment requiring stable component supply and full documentation traceability.

Supply support for ADS5474EVM-CVAL 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-reliability ICs, with deep expertise in space-grade and radiation-hardened technologies.

The ADS5474EVM-CVAL belongs to TI's Space Products evaluation platform family, engineered specifically to accelerate qualification and integration of radiation-hardened ADCs into mission-critical avionics and defense systems.

FAQ

What is the primary purpose of the ADS5474EVM-CVAL?

The ADS5474EVM-CVAL is an evaluation module designed exclusively to characterize the ADS5474-SP 14-bit, 400-MSPS radiation-hardened analog-to-digital converter. It provides calibrated analog input paths, precision clock conditioning, LVDS digital output access, and configurable power delivery to validate dynamic performance-such as SNR, SFDR, and aperture jitter-under representative operating conditions before system integration. The ADS5474EVM-CVAL does not function as a standalone data acquisition system but as a validated reference platform for the ADS5474-SP.

Which ADC variants does the ADS5474EVM-CVAL support besides the ADS5474-SP?

The ADS5474EVM-CVAL supports the ADS5444-SP and ADS5463-SP through jumper configuration (JP20). When JP20 pins 1–2 are shorted, the board powers the ADS5444-SP digital buffer with 5 V; when pins 2–3 are shorted, it configures for the ADS5463-SP or ADS5474-SP using 3.3 V. Jumper J21 must be grounded for ADS5474-SP operation to assert its power-down pin (pin 35), while ADS5444/63 leave that pin unconnected or grounded. All three devices share the same CQFP-84 footprint (U5).

How is the clock signal conditioned on the ADS5474EVM-CVAL?

The ADS5474EVM-CVAL accepts a single-ended clock up to 500 MHz at SMA connector J17 and conditions it using a Coilcraft WBC4-1W transformer, which converts the input to differential CLK± and steps up voltage by a factor of two. This ensures robust differential signaling into the ADS5474-SP's clock inputs (pins 10/11), minimizing skew and improving jitter immunity. The transformer's 4:1 impedance ratio and bandwidth support high-fidelity timing critical for >400-MSPS sampling.

What analog input options does the ADS5474EVM-CVAL provide?

The ADS5474EVM-CVAL offers two independent analog input configurations: (1) a passive balun path using MACOM ETC1-1-13 (4 MHz–1 GHz, <1 dB insertion loss), default-connected via JP3/JP4; and (2) an active path using THS9000 amplifiers (U6/U7) for improved noise floor and drive capability. Both accept single-ended 50-Ω sources at SMA connectors J11 (balun) or J10 (amplifier), converting them to differential AIN+/AIN− for the ADS5474-SP. Impedance matching components (L7/C88/C68) are provided but unpopulated by default.

Does the ADS5474EVM-CVAL include provisions for measuring reference voltage or other internal nodes?

Yes, the ADS5474EVM-CVAL includes test point TP1 for direct access to the ADS5474-SP's internal VREF voltage, enabling verification of reference stability and accuracy during evaluation. Additional test points and unpopulated component footprints (e.g., L7, C88, C68) allow for custom impedance tuning or probing of analog/digital supply rails, clock paths, and LVDS outputs. The board's schematic and layout documentation fully identify all accessible nodes for measurement and debugging.