Analog Devices Inc. EVAL-AD7674CBZ

Overview

EVAL-AD7674CBZ from Analog Devices is an evaluation board designed for the AD7674 - a 18-bit, 800 kSPS differential unipolar PulSAR® successive approximation register (SAR) ADC with parallel and serial interfaces. It supports on-board reference (AD780/ADR431/ADR435), buffered 18-bit parallel output via 40-pin IDC connector P2, and SMB-connected analog inputs for low-noise signal sourcing. It is used to characterize dynamic performance (SNR, SINAD, THD, SFDR) and DC accuracy (transition noise, histogram) of the AD7674 in lab and development environments.

For engineers reviewing the EVAL-AD7674CBZ datasheet, EVAL-AD7674CBZ pinout, EVAL-AD7674CBZ application, or EVAL-AD7674CBZ equivalent, this page provides verified technical context, interface configuration options (parallel/serial, warp/normal mode), analog input range support (0 to 5 V differential), power supply routing (±12 V analog, +5 V digital), and compatibility with EVAL-CED1Z and EVAL-CONTROL-BRDxZ capture boards.

Technical Context

The EVAL-AD7674CBZ implements a 4-layer PCB layout with separated analog and digital ground planes joined under the ADC to minimize noise coupling. It uses a gate array (U10) to generate CNVST, manage BUSY timing, and buffer 18-bit conversion data onto BD[0:15] (with BD[-2:15] available in stand-alone mode) and serial signals (SDOUT, SCLK, SYNC).

It supports flexible analog front-end configuration via op-amps U6/U7, selectable ±12 V/±5 V supplies (JP3, JP7, JP8), reference source selection (on-board or AVDD via JP4), and bipolar/unipolar input scaling through solder pads and DIP switches (S16/S35). The board accepts external CNVST via SMB connector J3 when JP22 is set to EXT.

Key Specifications

Availability

EVAL-AD7674CBZ is available at Aetrix Electronics and suitable for high-resolution data acquisition system validation, SAR ADC characterization labs, and embedded DSP interface prototyping requiring stable component supply and full-featured evaluation infrastructure.

Supply support for EVAL-AD7674CBZ 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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing (DSP) technologies for precision measurement and control applications.

The EVAL-AD7674CBZ belongs to Analog Devices' PulSAR® evaluation platform family, engineered to accelerate design-in of high-speed, high-accuracy SAR ADCs across instrumentation, industrial automation, and medical imaging systems.

FAQ

What is the primary function of the EVAL-AD7674CBZ?

The EVAL-AD7674CBZ is a dedicated evaluation board for the AD7674 18-bit, 800 kSPS differential unipolar SAR ADC. It enables full characterization of the AD7674's DC accuracy (via histogram testing) and AC performance (via FFT analysis), supports both parallel and serial data readout, and provides configurable analog signal conditioning, reference, and clocking resources - all without requiring custom hardware design.

Which ADC models does the EVAL-AD7674CBZ support besides the AD7674?

The EVAL-AD7674CBZ supports the broader AD76XX-48 family including AD761X, AD762X, AD763X, AD764X, AD765X, AD766X, AD767X, and AD795X devices. Its hardware and software are validated for 14-, 16-, and 18-bit variants such as AD7674, AD7641, AD7621, and AD7951, with jumper and switch settings (S16/S35, JP22, JP4) enabling model-specific configuration.

Can the EVAL-AD7674CBZ operate without a host capture board like EVAL-CED1Z or EVAL-CONTROL-BRDxZ?

Yes, the EVAL-AD7674CBZ can operate in stand-alone mode. When the CONTROL input to the gate array (U10) is pulled LOW (default), it autonomously generates CNVST, manages BUSY timing, and buffers 18-bit conversion data to BD[-2:15] on P2. No CED or ECB board is required for basic DC/AC testing using the included PC software and local oscillator U12.

How is analog input configured for the AD7674 on the EVAL-AD7674CBZ?

The EVAL-AD7674CBZ configures the AD7674 for 0 V to 5 V differential input by default, using op-amps U6/U7 as unity-gain buffers with ±12 V supplies (set via JP3, JP7, JP8). Input range scaling, filtering, and common-mode adjustment are supported via solder pads and configuration switches (S16/S35), per AD7674 datasheet Application Hints and AN594.

What software tools are provided for the EVAL-AD7674CBZ?

Analog Devices provides two versions of evaluation software for the EVAL-AD7674CBZ: "AD76xx Evaluation Software CED" (for USB-connected EVAL-CED1Z) and "AD76xx Evaluation Software ECB" (for parallel-port-connected EVAL-CONTROL-BRDxZ). Both support histogram, FFT, decimation, and serial programmable port (SPP) configuration for compatible iCMOS devices - with full test result export and real-time visualization.