Analog Devices Inc. EVAL-AD4112SDZ

Overview

EVAL-AD4112SDZ from Analog Devices is a full-featured evaluation board designed to characterize the AD4112 24-bit Σ-Δ ADC, supporting ±10 V voltage inputs (8 single-ended or 4 differential) and 0 mA to 20 mA current inputs with on-board overvoltage/overcurrent protection, integrated ADR4525 2.5 V reference, and isoPower® digital isolation for industrial automation system validation.

For engineers reviewing the EVAL-AD4112SDZ datasheet, EVAL-AD4112SDZ pinout, EVAL-AD4112SDZ application, or EVAL-AD4112SDZ equivalent, this board enables rapid PC-based performance evaluation of high-accuracy analog front ends using SDP-B platform integration, AD411X Eval+ software, and configurable SPI interface - critical for validating precision data acquisition in PLCs, DCS, and sensor signal conditioning.

Technical Context

The EVAL-AD4112SDZ interfaces directly with the AD4112 via SPI (CS, SCLK, DIN, DOUT/RDY), leveraging the SDP-B's ADSP-BF527 processor for host control and USB communication. It implements galvanic isolation up to 2.5 kV_rms using the ADuM5411, separating power and data paths between the PC and ADC side.

Hardware configuration supports dual power modes (SDP-B–supplied or external DC via J6/J7), selectable isolated supply voltages (5 V or 3.3 V via R37), and flexible reference routing (default ADR4525ARZ connected to REF+ via LK1). Analog input routing includes Phoenix Contact MC 1.5/5-G-3.81 headers for voltage (J1/J2) and current (J3) channels, with jumper-configurable VCOM and external reference options.

Key Specifications

Availability

EVAL-AD4112SDZ is available at Aetrix Electronics and suitable for industrial automation system validation, precision sensor signal conditioning, and PLC analog I/O module development requiring stable component supply and full-feature evaluation capability.

Supply support for EVAL-AD4112SDZ 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 technologies, headquartered in Norwood, MA, with deep expertise in precision data acquisition and industrial interface solutions.

The EVAL-AD4112SDZ belongs to Analog Devices' AD411x evaluation platform family, engineered specifically to accelerate design-in of high-resolution, multi-channel Σ-Δ ADCs into demanding industrial automation applications such as distributed control systems and condition monitoring equipment.

FAQ

What is the primary function of the EVAL-AD4112SDZ?

The EVAL-AD4112SDZ is an evaluation board that enables comprehensive functional and performance testing of the AD4112 24-bit Σ-Δ ADC. It provides hardware infrastructure-including isolated power, precision reference, protected analog inputs, and SPI interface-to validate the device's ±10 V voltage and 0–20 mA current measurement capabilities in real-world industrial scenarios. The EVAL-AD4112SDZ must be used with the EVAL-SDP-CB1Z platform and AD411X Eval+ software to operate.

Which host platforms are compatible with the EVAL-AD4112SDZ?

The EVAL-AD4112SDZ is natively designed for use with the EVAL-SDP-CB1Z system demonstration platform, which provides USB-to-SPI bridging via its ADSP-BF527 processor. It also supports connection to the EVAL-ADuCM3029EZ-KIT for custom firmware development. The EVAL-AD4112SDZ does not operate standalone without one of these host boards or equivalent SPI controller with proper level-shifting and isolation.

Does the EVAL-AD4112SDZ include on-board protection for analog inputs?

Yes, the EVAL-AD4112SDZ incorporates dedicated overvoltage and overcurrent protection circuitry for both voltage and current input channels - matching the AD4112's built-in fault tolerance. This allows safe connection to field instruments and industrial sensors without external protection components, preserving signal integrity while meeting IEC 61000-4-5 surge immunity requirements in typical configurations.

Can the EVAL-AD4112SDZ operate without the AD411X Eval+ software?

No - the EVAL-AD4112SDZ requires AD411X Eval+ software for configuration, data acquisition, and analysis. While the board's SPI interface is accessible via J10 for custom firmware, the default operation relies entirely on the AD411X Eval+ GUI to set ODR, input ranges, filter types, and interpret results. Without this software, no user-accessible control or visualization of ADC output is available on the EVAL-AD4112SDZ.

What isolation voltage rating does the EVAL-AD4112SDZ provide?

The EVAL-AD4112SDZ achieves 2.5 kV_rms galvanic isolation between the PC/SDP-B side and the AD4112 analog side using the ADuM5411 isoPower® digital isolator. This isolation covers both power and data lines, enabling safe evaluation in grounded industrial environments where ground loops or transient voltages could otherwise damage host equipment or corrupt measurements on the EVAL-AD4112SDZ.