Analog Devices Inc. EVAL-AD7984SDZ

Overview

EVAL-AD7984SDZ from Analog Devices is an evaluation board designed specifically for the AD7984 - a 18-bit, 1.33 MSPS PulSAR® successive-approximation ADC in a 10-lead MSOP package. It provides full signal chain support including on-board ADR435 5.0 V reference, ADA4841-1 ADC drivers, and dual-rail ±7.5 V/–2.5 V analog supply generation. The board enables high-fidelity dynamic testing (SNR > 100 dB, THD < –110 dB) of the AD7984 in fully differential or single-ended configurations.

For engineers reviewing the EVAL-AD7984SDZ datasheet, EVAL-AD7984SDZ pinout, EVAL-AD7984SDZ application, or EVAL-AD7984SDZ equivalent, this page delivers verified hardware interface details, software-controlled FFT/histogram analysis capabilities, SDP-compatible SPORT interface timing, and factory-configured analog input conditioning optimized for 18-bit precision ADC validation.

Technical Context

The EVAL-AD7984SDZ implements a modular analog front-end with SMA-connected inputs (J6/J10), unity-gain buffered amplifiers (U12/U14), and programmable common-mode voltage (VCM) derived from the ADR435 reference. It supports both differential and single-ended input modes via solder link SL10 configuration.

It interfaces to the EVAL-SDP-CB1Z system demonstration platform via a 120-pin connector using SPORT serial protocol, with clocking managed by ADSP-BF527 DSP logic and AND-gate glue logic (U9–U11). Power is supplied either by included 9 V wall adapter or external bench supply via screw terminals J2/J3.

Key Specifications

Availability

EVAL-AD7984SDZ is available at Aetrix Electronics and suitable for precision data acquisition, industrial sensor interface, and medical instrumentation applications requiring stable component supply and validated ADC performance characterization.

Supply support for EVAL-AD7984SDZ 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.

This evaluation board belongs to Analog Devices' PulSAR® ADC evaluation platform family, engineered to accelerate validation of high-resolution SAR ADCs in test, measurement, and precision control systems.

FAQ

What is the primary function of the EVAL-AD7984SDZ?

The EVAL-AD7984SDZ is a dedicated evaluation board for the AD7984 18-bit, 1.33 MSPS PulSAR ADC. It provides complete signal conditioning, precision reference, dual-rail analog power, and SPORT-based digital interface to enable accurate dynamic and static performance characterization - including SNR, SINAD, THD, and INL/DNL - without requiring custom PCB design. The EVAL-AD7984SDZ integrates all necessary circuitry to isolate and validate the true performance of the AD7984 under real-world conditions.

Which ADCs does the EVAL-AD7984SDZ support besides the AD7984?

The EVAL-AD7984SDZ supports the full 10-lead PulSAR ADC family, including AD7685, AD7686, AD7687, AD7688, AD7690, AD7691, AD7693, AD7942, AD7946, AD7980, AD7982, AD7983, AD7988-5, AD7989-5, AD7915, and AD7916. However, the EVAL-AD7984SDZ is configured and calibrated for optimal operation with the AD7984, particularly its 18-bit resolution and 1.33 MSPS throughput. Other devices require appropriate solder link (SL10) and reference voltage adjustments per UG-340.

How does the EVAL-AD7984SDZ connect to a PC for data acquisition?

The EVAL-AD7984SDZ connects to a PC via the EVAL-SDP-CB1Z system demonstration platform using a 120-pin ribbon cable and standard USB A-to-Mini-B cable. The SDP board handles SPORT communication with the AD7984 on the EVAL-AD7984SDZ and relays captured data to the host PC. The bundled Windows software - installed before hardware connection - detects the SDP board in Device Manager and enables real-time waveform, FFT, and histogram analysis without additional drivers beyond those provided in the installation package.

What power supplies are required to operate the EVAL-AD7984SDZ?

The EVAL-AD7984SDZ operates from a supplied 9 V wall adapter, which powers on-board regulators (ADP7102, ADP7104, ADP2301) to generate +7.5 V, –2.5 V, +5 V, +3.3 V, and +2.5 V rails. Alternatively, it can be powered from an external bench supply via screw terminals J2/J3, requiring jumper reconfiguration (SL1 = B, SL2 = B, SL3 = B, SL7 = B, SL4 = B). All supplies are decoupled locally, and a single ground plane minimizes noise coupling critical for 18-bit measurement integrity.

Does the EVAL-AD7984SDZ include software, and what analysis functions does it provide?

Yes - the EVAL-AD7984SDZ includes downloadable Windows software that performs time-domain waveform capture, AC/DC histogram analysis (mean, std dev, code distribution), FFT-based spectral analysis (SNR, SINAD, THD, SFDR, SFDR), and consolidated summary reporting. It supports .tsv file export for post-processing and offline analysis. The software auto-detects the connected ADC, enforces valid SCLK/sample rate relationships, and adjusts settings when out-of-range values are entered - ensuring reliable operation aligned with the AD7984's timing and resolution specifications.