Analog Devices Inc. EVAL-AD7625FMCZ

Overview

EVAL-AD7625FMCZ from Analog Devices is a fully featured FMC-compatible evaluation board designed to demonstrate the low-power, high-precision performance of the AD7625 16-bit, 6 MSPS PulSAR® differential analog-to-digital converter. It integrates on-board ADR3412/ADR4540 voltage references, ADA4899-1/ADA4932-1 signal conditioning amplifiers, ADP7102/ADP2300 power regulators, and interfaces via a 160-pin VITA 57 FMC connector to the EVAL-SDP-CH1Z system demonstration platform for USB-controlled time- and frequency-domain analysis.

For engineers reviewing the EVAL-AD7625FMCZ datasheet, EVAL-AD7625FMCZ pinout, EVAL-AD7625FMCZ application, or EVAL-AD7625FMCZ equivalent, this page provides verified hardware configuration details, supported ADC interface modes (LVDS echo-clocked), reference selection options (1.2 V or 4.096 V), analog input path flexibility (single-ended or fully differential), and software-controlled sampling up to 6 MSPS - all critical for rapid validation of high-speed precision data acquisition systems.

Technical Context

The EVAL-AD7625FMCZ implements an LVDS echo-clocked serial interface with three differential pairs (D±, CLK±, DCO±) to the host FPGA on the EVAL-SDP-CH1Z, supporting deterministic timing alignment and no pipeline latency. It supports dual reference configurations: internal 4.096 V buffered reference, external 4.096 V via ADR4540 + AD8031 buffer, or external 1.2 V via ADR3412 + AD8031 to generate the internal reference.

Analog signal conditioning includes selectable amplifier paths using ADA4899-1 (unity-gain buffer) or ADA4932-1 (fully differential driver), powered by ±2.5 V and +7 V rails generated from a 12 V input via ADP7102, ADP2300, and ADP124 regulators. Input signals enter through SMA connectors J3/J5, with factory-configured midscale common-mode bias derived from the AD7625's VCM output.

Key Specifications

Availability

EVAL-AD7625FMCZ is available at Aetrix Electronics and suitable for high-speed test instrumentation, medical imaging front-ends, portable spectrum analyzers, and industrial process monitoring requiring stable component supply, traceable sourcing, and long-term evaluation platform continuity.

Supply support for EVAL-AD7625FMCZ 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, headquartered in Wilmington, MA, with design centers and manufacturing facilities worldwide.

EVAL-AD7625FMCZ belongs to Analog Devices' Precision ADC Evaluation Platform product line, engineered to accelerate prototyping and characterization of high-resolution, low-latency SAR ADCs in demanding measurement and control applications.

FAQ

What is the primary function of the EVAL-AD7625FMCZ?

The EVAL-AD7625FMCZ is a dedicated evaluation board for the AD7625 16-bit, 6 MSPS PulSAR® differential ADC. It provides complete signal conditioning, precision voltage referencing, regulated power delivery, and LVDS-based digital interface to the EVAL-SDP-CH1Z platform - enabling immediate functional verification, dynamic performance testing (FFT, histogram), and system-level integration assessment without custom hardware design. The EVAL-AD7625FMCZ does not operate standalone and requires the SDP board and PC software.

Does the EVAL-AD7625FMCZ support both AD7625 and AD7626 devices interchangeably?

No - while the EVAL-AD7625FMCZ board shares physical layout and documentation with EVAL-AD7626FMCZ, it is specifically configured and validated for the AD7625 (6 MSPS). The AD7626 operates at 10 MSPS and may require different timing constraints, FPGA firmware, and software settings. Analog Devices explicitly lists them as separate orderable part numbers with distinct user guide references; using EVAL-AD7625FMCZ for AD7626 validation requires verification of clocking, LVDS timing margins, and software compatibility per UG-745 Rev. A.

Which reference configuration is factory-default on the EVAL-AD7625FMCZ?

The EVAL-AD7625FMCZ ships with LK2 open and LK3 inserted, selecting the external 4.096 V reference from the ADR4540, buffered by the AD8031. This configuration delivers superior initial accuracy and temperature stability compared to the internal reference. Users can switch to the internal 4.096 V reference (LK2/LK3 both open) or external 1.2 V reference (LK2 inserted, LK3 open) using documented jumper settings - all options are electrically validated in UG-745.

What power supplies are required to operate the EVAL-AD7625FMCZ?

The EVAL-AD7625FMCZ receives 12 V dc exclusively through its 160-pin FMC connector (J7) from the EVAL-SDP-CH1Z board - no external bench supplies are required for basic operation. On-board ADP7102, ADP2300, ADP124, and ADP7104 regulators derive +7 V (for amplifier +VS), −2.5 V (for amplifier −VS), +5 V (VDD1), +2.5 V (VDD2/VIO), and +3.3 V (EEPROM) from that 12 V rail. External ±VS supplies via terminal block J4 are optional and intended only for advanced amplifier biasing experiments.

Can the EVAL-AD7625FMCZ be used without the EVAL-SDP-CH1Z?

No - the EVAL-AD7625FMCZ lacks onboard USB interface, FPGA, memory, or host controller. It relies entirely on the EVAL-SDP-CH1Z for LVDS communication, clock generation, data buffering, and USB-to-FPGA bridge functionality. The SDP board's Spartan-6 FPGA and Blackfin processor execute the AD7625/AD7626 evaluation software commands and manage real-time data streaming. Attempting to use EVAL-AD7625FMCZ without EVAL-SDP-CH1Z results in no digital connectivity or software control.