Analog Devices Inc. EVAL-AD7490SDZ

Overview

EVAL-AD7490SDZ from Analog Devices is an evaluation board for the AD7490 - a 12-bit, 1 MSPS, 16-channel successive approximation ADC with integrated sequencer and SPI-compatible serial interface. It supports single-supply operation from 2.7 V to 5.25 V, delivers 69.5 dB SNR at 50 kHz input, and enables multichannel data acquisition in battery-powered instrumentation and power line monitoring systems.

For engineers reviewing the EVAL-AD7490SDZ datasheet, EVAL-AD7490SDZ pinout, EVAL-AD7490SDZ application, or EVAL-AD7490SDZ equivalent, this board provides full hardware access to all AD7490 signals - including VIN0–VIN15, CS, SCLK, DOUT/DIN, REFIN, VDD, and VDRIVE - with on-board reference, decoupling, and header-based connectivity for rapid prototyping of high-speed analog front ends.

Technical Context

The EVAL-AD7490SDZ implements the AD7490 in its 32-lead LFCSP package (CP-32-3), with direct routing of all analog inputs, digital control lines, and reference paths to 0.1" headers. It includes a precision 2.5 V reference (ADR3425), low-ESR ceramic decoupling (100 nF + 10 µF per supply rail), and configurable jumpers for VDRIVE selection (3 V or 5 V) and REFIN sourcing (internal or external).

Board-level design follows Analog Devices' layout guidelines for high-resolution SAR ADCs: split AGND/DGND planes joined at a single point near the AD7490's exposed pad, guard rings around analog inputs, and minimized trace lengths for SCLK and CS to reduce timing skew. The board supports both straight binary and twos complement output coding via software-configurable control register bits.

Key Specifications

Availability

EVAL-AD7490SDZ is available at Aetrix Electronics and suitable for industrial data acquisition, battery-powered test equipment, and power quality monitoring requiring stable component supply, full documentation support, and long-term evaluation platform availability.

Supply support for EVAL-AD7490SDZ 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 R&D and manufacturing across North America, Europe, and Asia.

The EVAL-AD7490SDZ belongs to Analog Devices' precision data acquisition evaluation platform family, designed to accelerate validation of high-speed, multichannel SAR ADCs in real-world signal chain applications - especially where channel sequencing, low power, and flexible voltage domain interfacing are critical.

FAQ

What is the primary function of the EVAL-AD7490SDZ?

The EVAL-AD7490SDZ is a dedicated evaluation board for the AD7490 12-bit, 16-channel SAR ADC. It provides complete hardware implementation - including power regulation, reference generation, signal routing, and header-based I/O - enabling engineers to characterize conversion performance, validate timing margins, and integrate the AD7490 into system prototypes without custom PCB design. The EVAL-AD7490SDZ directly supports all AD7490 features documented in Rev. E datasheet.

Does the EVAL-AD7490SDZ support both TSSOP and LFCSP packages of the AD7490?

No. The EVAL-AD7490SDZ is specifically designed for the AD7490 in the 32-lead LFCSP package (CP-32-3), as confirmed by Analog Devices' official evaluation board documentation and schematic. It does not accommodate the 28-lead TSSOP variant. Pin mapping, thermal pad connection, and layout optimization are tailored exclusively to the LFCSP footprint and mechanical dimensions specified in the AD7490 Rev. E datasheet.

Can the EVAL-AD7490SDZ operate with an external reference instead of the onboard ADR3425?

Yes. The EVAL-AD7490SDZ provides a dedicated REFIN header (J3) and jumper options (JP1) to disconnect the onboard ADR3425 and route an external reference voltage (2.5 V ±1% for specified performance) directly to the AD7490's REFIN pin. This allows users to evaluate reference sensitivity, test alternative references (e.g., ADR4525), or match system-level reference domains without hardware modification.

What software and drivers are required to use the EVAL-AD7490SDZ with a PC?

The EVAL-AD7490SDZ interfaces with a PC via the SDP-B (System Development Platform) controller board (not included), using Analog Devices' ACE (Analysis, Control, Evaluation) software. ACE provides GUI-based register configuration, real-time waveform capture, FFT analysis, and scripting support. No custom drivers are needed - ACE installs standard USB CDC-class drivers for SDP-B communication. Firmware updates and example scripts are available from the official Analog Devices EVAL-AD7490SDZ product page.

Is the EVAL-AD7490SDZ qualified for automotive applications?

The EVAL-AD7490SDZ itself is not AEC-Q100 qualified, but it hosts the AD7490W variant - which is AEC-Q100 qualified for automotive applications (−40°C to +125°C). The board's layout, component selection (e.g., automotive-grade capacitors), and thermal design align with AD7490W requirements, making it suitable for pre-compliance validation in automotive subsystems such as battery management and powertrain sensor interfaces. Final system qualification remains the responsibility of the end customer.