Analog Devices Inc. EVAL-AD7625EDZ

Overview

EVAL-AD7625EDZ from Analog Devices is an evaluation board designed to demonstrate the performance of the AD7625 16-bit, 6 MSPS PulSAR® analog-to-digital converter. It integrates on-board signal conditioning (ADA4899-1, ADA4932-1), buffered 4.096 V reference (ADR434), FPGA-based LVDS deserialization, and a 96-pin DIN interface for connection to the EVAL-CED1Z capture board - enabling high-fidelity data acquisition testing in lab and development environments.

For engineers reviewing the EVAL-AD7625EDZ datasheet, EVAL-AD7625EDZ hardware setup, EVAL-AD7625EDZ software installation, or EVAL-AD7625EDZ compatibility with EVAL-CED1Z, this page provides verified functional context, configuration options (e.g., jumper-selectable analog front-end gain and supply rails), supported test modes (histogram, FFT, decimated AC), and supply chain support for prototyping and validation workflows.

Technical Context

The EVAL-AD7625EDZ implements a dual-path analog input stage: default unity-gain buffered differential inputs via ADA4899-1 op-amps (J1/J2 SMB connectors), or optional single-ended-to-differential conversion using ADA4932-1 with 50 Ω termination. Reference selection includes internal AD7625 REFIN (1.2 V), internal 4.096 V bandgap, or external ADR434 (buffered by AD8031).

Conversion control uses internally generated timing driven by CNV±; the onboard Cyclone III EP3C5F256C7N FPGA handles LVDS deserialization to parallel 16-bit output compatible with EVAL-CED1Z's 96-pin edge connector. Supported interfaces include echoed-clock LVDS (3 LVDS pairs) and buffered parallel data (BD15:0), with BBUSY used as the data-ready interrupt signal.

Key Specifications

Availability

EVAL-AD7625EDZ is available at Aetrix Electronics and suitable for high-speed data acquisition validation, precision ADC characterization, and DSP interface development requiring stable component supply and full technical documentation support.

Supply support for EVAL-AD7625EDZ 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

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, automotive, and healthcare markets.

This evaluation board belongs to Analog Devices' PulSAR® ADC evaluation platform family, engineered specifically to accelerate time-to-test for high-resolution, high-speed SAR ADCs in demanding measurement and instrumentation applications.

FAQ

What is the primary purpose of the EVAL-AD7625EDZ?

The EVAL-AD7625EDZ is a dedicated evaluation platform for the AD7625 16-bit, 6 MSPS PulSAR® ADC. It provides a complete, ready-to-use signal chain - including analog front-end amplification, precision reference, FPGA-based LVDS deserialization, and standardized interface to the EVAL-CED1Z capture board - enabling rapid performance verification, software-driven testing (histogram, FFT, decimation), and system-level integration validation without custom hardware design. The EVAL-AD7625EDZ simplifies evaluation of dynamic parameters like SNR, SINAD, THD, and SFDR under real-world conditions.

Which host hardware does the EVAL-AD7625EDZ require to operate?

The EVAL-AD7625EDZ requires the EVAL-CED1Z data capture board to function - it connects via a 96-pin DIN connector (P4) and relies on the CED1Z for USB 2.0 PC interface, buffered /WR and /RD strobes, and BUSY interrupt signaling. A Windows PC (XP or later) with administrator privileges is needed for software installation and operation. An external ±7 V/±5 V DC supply powers the board, and low-distortion AC sources (e.g., Audio Precision) are recommended for AC performance testing. The EVAL-AD7625EDZ cannot operate standalone or with non-CED1Z hosts.

How does the analog input path work on the EVAL-AD7625EDZ?

The EVAL-AD7625EDZ offers two configurable analog input paths: (1) Default differential mode using two ADA4899-1 unity-gain buffers (U13/U14), accepting signals directly at SMB connectors J1/J2; or (2) Single-ended-to-differential conversion using ADA4932-1 (U5), enabled by reconfiguring jumpers JP1, JP2, JP6, and JP9. The front end supports selectable amplifier supplies (±7 V/±5 V), common-mode bias (VCM), and optional filtering (C48/C49). Input range scaling, gain, and termination (50 Ω) are all user-adjustable via solder links and component placement per the board's schematic and BOM.

What software tools are provided for the EVAL-AD7625EDZ?

Analog Devices provides the "AD7625_26 Evaluation Software" for the EVAL-AD7625EDZ, installed via setup.exe from CD or Analog Devices website. It supports histogram (DC noise analysis), FFT (AC metrics: SNR, SINAD, THD, SFDR), and decimated AC testing (up to 32-bit effective resolution). The software communicates exclusively with the EVAL-CED1Z board and displays real-time results in graphical formats (oscilloscope, FFT spectrum, histogram, summary tables). All tests require proper hardware connection, driver installation, and correct jumper settings - no third-party or open-source tools are officially supported.

Can the EVAL-AD7625EDZ be used with the AD7626 ADC?

Yes - the EVAL-AD7625EDZ is a shared platform for both the AD7625 (6 MSPS) and AD7626 (10 MSPS) 16-bit PulSAR® ADCs, as indicated by its full part number EVAL-AD7625_26EDZ. Hardware design, firmware, and software are identical for both devices. Users must ensure correct ADC mounting (32-lead LFCSP), verify power supply settings (VDD1/VDD2/VIO), and consult the respective AD7625 or AD7626 datasheet for device-specific timing, register maps, and performance curves. No hardware modification is required to switch between the two ICs.