Analog Devices Inc. EVAL-AD7767-2EDZ

Overview

EVAL-AD7767-2EDZ from Analog Devices is a dedicated evaluation board for the AD7767-2 - a 24-bit, single-channel, oversampled SAR ADC with 64 kSPS maximum output data rate, 109 dB SNR, and 8.5 mW power consumption. It supports standalone operation or integration with the EVAL-CED1Z control board, features on-board ADR445 5 V reference and dual ADA4841-1 op-amps, and enables precision linearity testing of high-resolution audio and instrumentation signal chains.

For engineers reviewing the EVAL-AD7767-2EDZ datasheet, EVAL-AD7767-2EDZ pinout, EVAL-AD7767-2EDZ application, or EVAL-AD7767-2EDZ equivalent, key selection considerations include MCLK source flexibility (1 MHz crystal or external 1.024 MHz), VDRIVE voltage configuration options (2.5 V via regulator, CED, or external), daisy-chain support via SDI/SDO, and compatibility with CED-based automated test workflows.

Technical Context

The EVAL-AD7767-2EDZ is designed exclusively for evaluating the AD7767-2 ADC and shares hardware compatibility with AD7767 and AD7767-1 variants. It implements differential analog input conditioning using two ADA4841-1 op-amps powered from ±7.5 V/–2.5 V supplies, with common-mode voltage set to 2.5 V (VREF/2) and precision buffered by an ADR445 5 V reference.

Signal routing is managed through a 96-way CED-compatible connector and 12 SMB sockets (J2–J15), supporting external MCLK, SCLK, CS, DRDY, SDI, SDO, SYNC/PD, and EXT_CMODE inputs. Link options (LK1–LK3, SL1–SL11) configure power sourcing, clock paths, and interface modes - including stand-alone vs. CED-coupled operation and daisy-chain verification capability.

Key Specifications

Availability

EVAL-AD7767-2EDZ is available at Aetrix Electronics and suitable for high-fidelity audio converter validation, precision instrumentation ADC characterization, and industrial sensor signal chain prototyping requiring stable component supply and traceable evaluation infrastructure.

Supply support for EVAL-AD7767-2EDZ 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-AD7767-2EDZ belongs to Analog Devices' precision data converter evaluation platform family, engineered to accelerate validation of 24-bit sigma-delta and SAR ADCs in metrology, seismic, and high-end audio applications.

FAQ

What is the primary function of the EVAL-AD7767-2EDZ?

The EVAL-AD7767-2EDZ is a dedicated evaluation board for the AD7767-2 24-bit SAR ADC. It provides complete signal conditioning, precise voltage referencing, configurable clocking, and digital interface circuitry to enable accurate performance characterization - including SNR, THD, INL, and DNL - under real-world analog input conditions. The EVAL-AD7767-2EDZ does not operate as a standalone data acquisition system but requires connection to the EVAL-CED1Z or compatible host controller for full functionality.

Which ADC variants does the EVAL-AD7767-2EDZ support?

The EVAL-AD7767-2EDZ supports three variants: AD7767 (128 kSPS), AD7767-1 (32 kSPS), and AD7767-2 (64 kSPS). All share identical pinout, power architecture, and analog front-end design. Differences in output data rate and digital filtering are configured via software-controlled register settings and MCLK selection - the EVAL-AD7767-2EDZ hardware itself is fully common across all three devices.

How is the analog input conditioned on the EVAL-AD7767-2EDZ?

The EVAL-AD7767-2EDZ uses two ADA4841-1 operational amplifiers to buffer and drive the AD7767-2's differential analog inputs. These op-amps are powered from +7.5 V and –2.5 V supplies applied at J12, and configured to deliver a 2.5 V common-mode voltage (VREF/2) with ±2.5 V differential swing. Input options include XLR (J4) for balanced audio sources and BNC (J2) for single-ended signals converted to differential mode.

Can the EVAL-AD7767-2EDZ operate without the EVAL-CED1Z?

Yes - the EVAL-AD7767-2EDZ supports stand-alone operation using external logic signals. Solder links SL1–SL6 allow routing of SCLK, CS, DRDY, SDO, and MCLK to SMB connectors (J5–J11), enabling direct interfacing with FPGA or microcontroller-based test systems. However, the included PC software and automated analysis features require the EVAL-CED1Z; stand-alone use demands custom host firmware and signal generation.

What software tools are provided with the EVAL-AD7767-2EDZ?

The EVAL-AD7767-2EDZ ships with Windows® 2000/XP-compatible evaluation software that runs only when connected to the EVAL-CED1Z. It provides real-time waveform display, FFT spectrum analysis, histogram generation, statistical metrics (SNR, THD, SFDR), and dedicated linearity evaluation with 21-bit INL/DNL plots. The software includes driver installation, automatic USB enumeration, and front-panel controls for sampling rate, buffer depth, and trigger configuration - all calibrated specifically for the EVAL-AD7767-2EDZ hardware layout and AD7767-2 timing parameters.