Analog Devices Inc. EVAL-AD7682EDZ

Overview

EVAL-AD7682EDZ from Analog Devices is an evaluation board designed for the AD7682, AD7689, AD7699, and AD7949 14- to 16-bit PulSAR® successive approximation register (SAR) analog-to-digital converters. It supports up to 500 kSPS throughput, 4–8 channel configurations, and features on-board ADR435 reference, FPGA-based serial-to-parallel conversion, and configurable analog signal conditioning for precision DC/AC testing.

For engineers reviewing the EVAL-AD7682EDZ datasheet, EVAL-AD7682EDZ pinout, EVAL-AD7682EDZ application, or EVAL-AD7682EDZ equivalent, this page delivers verified hardware interface details, ADC family compatibility, stand-alone and CED1Z-coupled operation modes, reference selection options, and software-controlled configuration of input range, bandwidth, and channel mapping - all critical for high-resolution data acquisition system validation.

Technical Context

The EVAL-AD7682EDZ implements a 6-layer PCB layout with strict analog/digital ground separation under the ADC to preserve SNR and SFDR performance. Its on-board FPGA (U6) handles CNV timing generation, serial interface buffering (SDO/SCK/DIN/CNV), and 16-bit parallel data transfer to the EVAL-CED1Z via a 96-pin DIN connector.

Analog front-end flexibility includes SMB connectors (J1/J2) for CH0/CH1, IDC header P1 for all 4 or 8 channels, jumper-configurable COM/VCM reference point (J3), and op-amp-based signal conditioning (U13–U20) with selectable ±5V/±7V supplies (VDRV−/VDRV+) and unity-gain factory default configuration.

Key Specifications

Availability

EVAL-AD7682EDZ is available at Aetrix Electronics and suitable for precision data acquisition, sensor signal chain validation, and SAR ADC performance benchmarking requiring stable component supply, traceable sourcing, and long-term lifecycle support.

Supply support for EVAL-AD7682EDZ 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 Norwood, MA, with design centers worldwide and a legacy of precision converter innovation.

The EVAL-AD7682EDZ belongs to Analog Devices' PulSAR® evaluation platform family, engineered specifically to accelerate development of high-resolution, low-power, multi-channel data acquisition systems for industrial instrumentation, medical diagnostics, and automated test equipment.

FAQ

What ADC devices does the EVAL-AD7682EDZ support?

The EVAL-AD7682EDZ supports four specific PulSAR® ADCs: AD7682 (4-channel, 14-bit), AD7689 (8-channel, 14-bit), AD7699 (8-channel, 16-bit), and AD7949 (8-channel, 14-bit). All share pin-compatible footprints and serial interface protocols, allowing the same EVAL-AD7682EDZ board to validate multiple members of the family without hardware modification. Each device's unique channel count and resolution are preserved in software configuration.

Does EVAL-AD7682EDZ require the EVAL-CED1Z to operate?

No - EVAL-AD7682EDZ supports both stand-alone and EVAL-CED1Z-coupled operation. In stand-alone mode, users can access raw serial signals (SDO/SCK/DIN/CNV) at test points or via IDC header P3, and power the board using discrete analog/digital supplies. The EVAL-CED1Z is required only for USB-hosted software control, histogram/FFT analysis, and buffered parallel data capture - not for basic ADC functionality verification.

How is the reference configured on EVAL-AD7682EDZ?

EVAL-AD7682EDZ offers three reference sources: on-chip (2.5 V or 4.096 V, software-selectable), on-board ADR435 (4.096 V or 2.5 V, jumper P5), or external reference via TP17. Jumpers P6 (buffer enable), P7 (REF/REFIN routing), and JP9–JP11 (voltage selection) determine signal path and drive strength. Default configuration uses buffered ADR435 output at 4.096 V, routed to ADC REF through P5/P6/P7 jumpers set to middle positions.

Can EVAL-AD7682EDZ be used for bipolar input measurements?

Yes - EVAL-AD7682EDZ supports bipolar operation by configuring jumper P8 to "VCM" (middle position), which sets the common-mode voltage to VREF/2, and selecting "Bipolar" input mode in software. This allows differential or pseudo-differential inputs centered at mid-scale, enabling full utilization of the ADC's dynamic range for AC-coupled or dual-supply sensor signals without external level-shifting circuitry.

What software tools are provided for EVAL-AD7682EDZ?

Analog Devices provides the PulSAR Evaluation Software (Eval PulSAR CED.exe), compatible with Windows XP, for controlling EVAL-AD7682EDZ via EVAL-CED1Z. It enables histogram (DC noise), FFT (SNR/SINAD/THD/SFDR), and oscilloscope (time-domain) analysis; supports configurable sample rate, input range, channel selection, bandwidth filtering, and reference source. Configuration files (.dat) and HTML/spreadsheet exports are supported for repeatable test documentation.