Texas Instruments ADS5423EVM

Overview

ADS5423EVM from Texas Instruments is an evaluation module designed to characterize the ADS5423 14-bit, 80-MSPS analog-to-digital converter under real-world signal, clock, and supply conditions. It supports transformer-coupled or differential-amplifier analog input paths, provides buffered parallel LVCMOS digital outputs via a 40-pin IDC header, and accepts external SMA clock and analog inputs for lab-based ADC performance validation in high-speed data acquisition systems.

For engineers reviewing the ADS5423EVM datasheet, ADS5423EVM pinout, ADS5423EVM application, or ADS5423EVM equivalent, this page delivers verified physical layout details, power configuration options (±5 V for amplifier path or +5 V/+3.3 V for transformer path), jumper-controlled input routing (SJP3/SJP4), SN74AVC16244 output buffering, and test point access (J14 for Vref, J17 for DMID) essential for signal integrity validation and system-level integration.

Technical Context

The ADS5423EVM implements dual analog input architectures: one using ADT1-1WT 1:1 RF transformer coupling (default), the other using THS4503/THS4601 differential amplifiers requiring ±5-V supplies. Input selection is controlled by three-pin jumpers SJP3 and SJP4, with documented default states (SJP3 pins 1–2, SJP4 pins 2–3) enabling transformer mode.

Digital output uses SN74AVC16244 level-shifting buffers driving a standard 40-pin 100-mil IDC connector (J9), supporting 14-bit parallel LVCMOS data (D0–D13), overflow (OVR), ready (DRY), and clock (CLK) signals. Power delivery includes dedicated banana jacks for AVDD (+5 V), DVDD (+3.3 V), DRVDD (+3.3 V), and amplifier rails (±5 V), with on-board decoupling using 0.1-µF and 33-µF capacitors across all supply domains.

Key Specifications

Availability

ADS5423EVM is available at Aetrix Electronics and suitable for high-speed data acquisition, radar receiver front-end evaluation, communications test equipment development, and instrumentation design requiring stable component supply and full documentation support.

Supply support for ADS5423EVM 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 ADS5423EVM belongs to TI's precision high-speed ADC evaluation platform family, engineered to accelerate time-to-validation for RF-sampling and wideband digitization applications in test & measurement and defense electronics.

FAQ

What is the primary function of the ADS5423EVM?

The ADS5423EVM is a hardware evaluation platform built to validate the electrical performance of the ADS5423 14-bit, 80-MSPS analog-to-digital converter. It enables engineers to assess dynamic parameters-including SNR, SFDR, and ENOB-under configurable analog input paths (transformer or amplifier), variable clock sources, and multiple supply configurations. The ADS5423EVM does not operate as a standalone product but serves exclusively as a characterization tool for the ADS5423 IC and its family members.

Which ADC models are supported on the ADS5423EVM board?

The ADS5423EVM supports four specific ADC devices mounted as U1: ADS5423 (14-bit, 80 MSPS), ADS5424 (14-bit, 105 MSPS), ADS5433 (14-bit, 105 MSPS with different package), and ADS5411 (11-bit, 105 MSPS). All share identical pinout and footprint per the schematic, allowing direct substitution without PCB modification. Each device requires appropriate jumper settings and supply voltages aligned with its datasheet specifications.

How do I configure the ADS5423EVM for transformer-coupled analog input?

To configure the ADS5423EVM for transformer-coupled input, install jumpers SJP3 on pins 1–2 and SJP4 on pins 2–3 (the factory-default setting). Connect your single-ended 50-Ω signal source to SMA connector J11. Power the board with +5 V to J3 (AVDD) and +3.3 V to J4/J6 (DRVDD/DVDD); no ±5-V supplies are needed. This configuration routes the signal through the ADT1-1WT transformer to generate a clean differential input for the ADS5423.

What digital interface does the ADS5423EVM use to output ADC data?

The ADS5423EVM outputs digitized data via a 40-pin IDC header (J9) implementing parallel LVCMOS signaling. It delivers 14-bit two's complement data (D0–D13), overflow flag (OVR), data-ready strobe (DRY), and sampling clock (CLK), all buffered by a Texas Instruments SN74AVC16244 level translator. The pinout matches industry-standard logic analyzer connectivity, enabling immediate waveform capture without protocol translation or FPGA interfacing.

Are test points provided on the ADS5423EVM for voltage monitoring?

Yes, the ADS5423EVM includes two calibrated test points: J14 provides direct access to the internal reference voltage Vref = AVDD/2 (2.5 V when AVDD = 5 V), and J17 provides access to the digital mid-supply voltage DMID = DVDD/2 (1.65 V when DVDD = 3.3 V). These points allow real-time verification of reference stability and supply rail integrity during ADC characterization, critical for diagnosing gain error, offset drift, or noise coupling issues.