Analog Devices Inc. EVAL-AD7609EDZ

Overview

EVAL-AD7609EDZ from Analog Devices is an evaluation board for the AD7609 8-channel, 18-bit, true differential, simultaneous-sampling ADC. It supports ±20 V/±10 V bipolar input ranges, operates from a single 5 V analog supply with 2.3–5.25 V VDRIVE, delivers 200 kSPS per channel, and integrates antialiasing filters, on-chip 2.5 V reference, and parallel/serial (SPI-compatible) interfaces - used for validating high-accuracy power line monitoring and multiaxis industrial data acquisition systems.

For engineers reviewing the EVAL-AD7609EDZ datasheet, EVAL-AD7609EDZ pinout, EVAL-AD7609EDZ application, or EVAL-AD7609EDZ equivalent, this page provides verified board-level specifications, interface configuration options, host controller integration guidance, power sequencing requirements, and hardware validation procedures specific to the AD7609 DAS IC evaluation platform.

Technical Context

The EVAL-AD7609EDZ implements a complete signal chain for the AD7609 IC, including precision analog front-end conditioning, configurable oversampling digital filtering, dual conversion start control (CONVST A/B), and flexible parallel/serial readout modes. It supports both internal 2.5 V reference and external reference inputs via REFIN/REFOUT and REF SELECT pins.

Board-level design includes dedicated decoupling networks for AVCC, VDRIVE, REFCAPA/REFCAPB, and REGCAP rails; clamp protection circuitry rated for ±16.5 V on each analog input; and second-order antialiasing LPFs with −3 dB points at 32 kHz (±20 V) and 23 kHz (±10 V). The board enables full characterization of SNR (98 dB typical), THD (−107 dB), and channel-to-channel isolation (−95 dB).

Key Specifications

Availability

EVAL-AD7609EDZ is available at Aetrix Electronics and suitable for power line monitoring, multiphase motor control, instrumentation systems, and multiaxis positioning applications requiring stable component supply, rapid prototyping support, and validated reference designs for high-resolution bipolar data acquisition.

Supply support for EVAL-AD7609EDZ 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 technologies for precision measurement and control applications.

The EVAL-AD7609EDZ belongs to Analog Devices' precision data acquisition evaluation platform family, designed to accelerate development of industrial, energy, and test equipment systems using simultaneous-sampling, high-resolution ADCs.

FAQ

What is the primary function of the EVAL-AD7609EDZ evaluation board?

The EVAL-AD7609EDZ evaluation board is a fully assembled and tested platform for evaluating the AD7609 8-channel, 18-bit, simultaneous-sampling ADC. It enables hardware validation, interface timing analysis, dynamic performance testing (SNR, THD), and system-level integration of the AD7609 in industrial data acquisition applications. The board includes all necessary decoupling, filtering, and reference circuitry required to operate the AD7609 per its datasheet specifications.

Does the EVAL-AD7609EDZ support both internal and external reference configurations for the AD7609?

Yes, the EVAL-AD7609EDZ supports both reference modes. When REF SELECT is set high, the AD7609 uses its internal 2.5 V reference routed to REFIN/REFOUT. When REF SELECT is low, the board accepts an external 2.5 V reference applied to REFIN/REFOUT. Decoupling capacitors (10 μF ceramic) are placed at REFCAPA/REFCAPB and REFIN/REFOUT per the AD7609 datasheet requirements to ensure stable reference operation in either mode.

How does the EVAL-AD7609EDZ handle analog input protection and signal conditioning?

The EVAL-AD7609EDZ implements the AD7609's integrated analog input clamp protection, tolerating up to ±16.5 V on each input pin. It retains the device's 1 MΩ input impedance and second-order antialiasing filter per channel, with −3 dB cutoffs at 32 kHz (±20 V range) and 23 kHz (±10 V range). No external op amps or bipolar supplies are needed - the board validates the AD7609's self-contained front-end architecture as specified in the Rev. D datasheet.

Can the EVAL-AD7609EDZ be used to evaluate oversampling and digital filtering features of the AD7609?

Yes, the EVAL-AD7609EDZ supports full evaluation of the AD7609's pin-driven digital filter, including oversampling ratios of 2× to 64×. OS0–OS2 pins are accessible for configuration, enabling measurable SNR improvement (e.g., +2 dB with 16× oversampling) and bandwidth reduction. Timing parameters such as tCONV (up to 315 μs at 64×) and FRSTDATA behavior are directly observable on the board using standard logic analyzers or oscilloscopes.

What interface options does the EVAL-AD7609EDZ provide for connecting to host processors or FPGAs?

The EVAL-AD7609EDZ supports both parallel and serial interfaces as defined by the AD7609. In parallel mode (PAR/SER SEL = low), it exposes DB[15:0], RD, CS, BUSY, and CONVST signals. In serial mode (PAR/SER SEL = high), it routes DOUTA/DOUTB, SCLK (RD/SCLK), and CS for SPI-compatible communication. All interface signals are brought out to 0.1"-spaced headers compatible with standard ribbon cables and logic analyzers.