Analog Devices Inc. EVAL-AD7400AEDZ

Overview

EVAL-AD7400AEDZ from Analog Devices is an evaluation board for the AD7400A isolated sigma-delta modulator, enabling rapid characterization of 16-bit, ±250 mV differential analog input performance with on-chip digital isolation and 10 MHz clock output. It supports shunt current sensing and isolated voltage monitoring in motor control and data acquisition systems.

For engineers reviewing the EVAL-AD7400AEDZ datasheet, EVAL-AD7400AEDZ pinout, EVAL-AD7400AEDZ application, or EVAL-AD7400AEDZ equivalent, this board provides verified reference design, layout-optimized signal integrity, calibrated test points for MDAT/MCLKOUT timing validation, and direct interface to FPGA/DSP-based sinc3 decimation filters.

Technical Context

The EVAL-AD7400AEDZ implements a complete test environment for the AD7400A IC, including precision low-noise power regulation for VDD1 (5 V) and VDD2 (3.3 V/5 V), differential analog input conditioning with RC network (22 Ω/47 pF), and buffered MCLKOUT/MDAT access via SMA connectors and test points. It replicates production-level grounding and creepage/clearance per IEC 60747-17 (VDE 0884-17).

Board-level features include solder jumpers for VIN+ reference selection (GND1 or external), configurable VDD2 supply source (LDO or external), and dedicated ground planes for isolated (GND1) and non-isolated (GND2) domains to maintain >645 V_PEAK reinforced insulation integrity during evaluation.

Key Specifications

Availability

EVAL-AD7400AEDZ is available at Aetrix Electronics and suitable for AC motor controls, shunt current monitoring, and industrial data acquisition systems requiring stable component supply and validated evaluation infrastructure.

Supply support for EVAL-AD7400AEDZ 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 Wilmington, MA.

The EVAL-AD7400AEDZ belongs to Analog Devices' precision isolation evaluation platform family, designed to accelerate development of reinforced-insulation systems for industrial motor drives, energy metering, and factory automation.

FAQ

What is the primary function of the EVAL-AD7400AEDZ?

The EVAL-AD7400AEDZ is an evaluation board purpose-built to characterize the AD7400A isolated sigma-delta modulator. It provides full hardware support-including regulated dual-supply rails, differential analog input conditioning, and buffered digital outputs-to validate timing, noise, INL/DNL, and isolation performance under real-world conditions before system integration.

Does the EVAL-AD7400AEDZ support both single-ended and differential analog inputs?

The EVAL-AD7400AEDZ is configured exclusively for differential analog input operation, matching the AD7400A's native architecture. It includes matched RC networks on VIN+ and VIN− pins and supports only the specified ±250 mV differential range-not single-ended configurations-per AD7400A datasheet Section "Analog Input" and Figure 23.

Can the EVAL-AD7400AEDZ be used to verify VDE 0884-17 compliance?

Yes-the EVAL-AD7400AEDZ layout adheres to DIN EN IEC 60747-17 (VDE 0884-17) requirements, including ≥7.8 mm creepage/clearance between GND1 and GND2 domains and reinforced insulation trace routing. It enables functional validation of VIORM = 645 V_PEAK and transient immunity ≥25 kV/µs as specified for the AD7400A in Table 5 and Table 3.

What decimation filter implementations are validated with the EVAL-AD7400AEDZ?

The EVAL-AD7400AEDZ is validated with Sinc3 digital filters using 256× decimation, producing 16-bit output words at ~39 kHz when paired with the AD7400A's 10 MHz MCLKOUT. Verilog reference code for Xilinx Spartan-II FPGAs is provided in the AD7400A datasheet (Rev. F, pp. 15–16), and the board's signal integrity supports clean MDAT sampling at both rising and falling clock edges.

Is external power required, or does the EVAL-AD7400AEDZ include on-board regulation?

The EVAL-AD7400AEDZ includes on-board LDOs to generate stable VDD1 (5 V) and VDD2 (3.3 V or 5 V) from a single 5 V or 12 V input, eliminating need for external supplies. It also supports direct external connection to VDD2 for custom voltage testing, with solder jumpers enabling flexible power configuration per AD7400A operating conditions in Table 1.