Analog Devices Inc. EVAL-AD7766EDZ

Overview

EVAL-AD7766EDZ from Analog Devices is an evaluation board designed for the AD7766, AD7766-1, and AD7766-2 24-bit oversampled SAR analog-to-digital converters. It supports maximum output data rates of 128 kSPS (AD7766), 64 kSPS (AD7766-1), and 32 kSPS (AD7766-2), operates from ±7.5V/–2.5V external supplies, integrates ADR445 5 V reference and dual ADA4841-1 op-amps, and enables precision ADC characterization in audio test, sensor signal conditioning, and high-resolution data acquisition systems.

For engineers reviewing the EVAL-AD7766EDZ datasheet, EVAL-AD7766EDZ pinout, EVAL-AD7766EDZ application, or EVAL-AD7766EDZ equivalent, this page delivers verified hardware configuration details, supported MCLK options (including onboard 1 MHz crystal), link settings for standalone vs. CED-integrated operation, analog input interface options (XLR differential, BNC single-ended), and software-controlled data capture via EVAL-CED1Z.

Technical Context

The EVAL-AD7766EDZ implements a full-featured hardware platform for evaluating three variants of the AD7766 family: the base AD7766 (128 kSPS), AD7766-1 (64 kSPS), and AD7766-2 (32 kSPS). All variants share 24-bit resolution, 109 dB SNR, 16-bit linearity (15 ppm), and 2.5 V AVDD1/DVDD supply with 1.8–5 V VDRIVE support.

Onboard resources include a 1 MHz crystal oscillator (Y1) for MCLK generation, configurable link options (LK1–LK3, SL1–SL11) to select power sources, clock routing, CS/SCLK/SDO paths, and common-mode voltage, plus dual ADA4841-1 op-amps powered from ±7.5V/–2.5V to drive the ADC's differential inputs at VREF/2 = 2.5 V.

Key Specifications

Availability

EVAL-AD7766EDZ is available at Aetrix Electronics and suitable for high-precision ADC validation, sensor interface prototyping, and audio test equipment development requiring stable component supply, traceable sourcing, and long-term evaluation board continuity.

Supply support for EVAL-AD7766EDZ 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.

The EVAL-AD7766EDZ belongs to Analog Devices' precision data converter evaluation platform family, engineered to accelerate validation of high-resolution ADCs in demanding measurement applications where noise floor, linearity, and timing integrity are critical.

FAQ

What is the primary function of the EVAL-AD7766EDZ?

The EVAL-AD7766EDZ is an evaluation board specifically built to characterize and validate the AD7766, AD7766-1, and AD7766-2 24-bit oversampled SAR ADCs. It provides complete signal chain support-including analog input buffering with ADA4841-1 op-amps, precision 5 V referencing via ADR445, onboard 1 MHz MCLK generation, and digital interfacing through a 96-way connector compatible with EVAL-CED1Z-enabling rapid, repeatable performance testing in lab environments.

Does the EVAL-AD7766EDZ include an onboard clock source?

Yes, the EVAL-AD7766EDZ includes a 1 MHz crystal oscillator (Y1) that supplies MCLK directly to the AD7766/-1/-2 devices. This allows immediate operation at 128 kSPS (AD7766), 64 kSPS (AD7766-1), or 32 kSPS (AD7766-2) without requiring external clock hardware. The oscillator output is routed via SL5 position B, and resistors R43/R23 can be used to level-shift its 5 V output to 2.5 V for VDRIVE compatibility.

Can the EVAL-AD7766EDZ operate without the EVAL-CED1Z?

Yes, the EVAL-AD7766EDZ supports standalone operation using external signal sources. Through solder links (e.g., SL1–SL6) and SMB connectors (J5–J11), users can apply external SCLK, CS, MCLK, DRDY, SDI, and SYNC/PD signals. Analog inputs may be fed via XLR (J4) or BNC (J2), and power is supplied via J12 (+7.5V/–2.5V) with LK1/LK2 set to Position B for ADA4841-1 amplifier compliance.

Which ADC variants does the EVAL-AD7766EDZ support?

The EVAL-AD7766EDZ supports all three members of the AD7766 family: the AD7766 (128 kSPS max), AD7766-1 (64 kSPS max), and AD7766-2 (32 kSPS max). Each variant maintains identical 24-bit resolution, 109 dB SNR, and 16-bit linearity (15 ppm), differing only in digital filter configuration and resulting output data rate. The board's link options and software allow seamless switching between variants during evaluation.

How is analog input handled on the EVAL-AD7766EDZ?

Analog input is conditioned by two ADA4841-1 op-amps configured for differential drive, referenced to VREF/2 = 2.5 V. Users may apply signals via XLR (J4) for balanced differential input or BNC (J2) for single-ended input converted internally to differential format. Common-mode voltage selection is controlled via SL11, with default sourcing from the 2.5 V DVDD star point, ensuring optimal ADC input compliance and noise rejection.