Analog Devices Inc. EVAL-AD5422LFEBZ

Overview

EVAL-AD5422LFEBZ from Analog Devices is a full-featured evaluation board designed to validate the AD5422 16-bit current source and voltage output DAC in industrial process control systems, supporting HART connectivity, 4 mA–20 mA loop configuration, and ±10 V bipolar voltage output with on-board ADR435 reference and AD7321 ADC for real-time output monitoring.

For engineers reviewing the EVAL-AD5422LFEBZ datasheet, EVAL-AD5422LFEBZ pinout, EVAL-AD5422LFEBZ application, or EVAL-AD5422LFEBZ equivalent, this board enables rapid functional validation of AD5422-based transmitter designs via USB PC control, configurable power supply routing (AVDD up to 40 V, AVSS down to −26.4 V), jumper-selectable reference sources (internal/ADR435/external), and dual-package support (TSSOP/LFCSP) - all without requiring custom firmware or hardware adaptation.

Technical Context

The EVAL-AD5422LFEBZ implements a complete signal chain for AD5422 evaluation: CY7C68013A USB microcontroller handles host communication and register-level DAC control; on-board ADR435 provides a stable 5 V reference for both DAC and AD7321 ADC; AD7321 simultaneously monitors VOUT and IOUT with readback capability enabled via LK14 and LK5 jumpers.

Power architecture supports independent analog/digital domains: AVDD (10.8 V–40 V), AVSS (0 V or −26.4 V), V+ (10.8 V–16.5 V), and V− (0 V or −16.5 V), with link options (LK9/LK16) preventing overvoltage damage to ADR435 and AD7321 when AVDD exceeds 16.5 V or AVSS magnitude exceeds 16.5 V.

Key Specifications

Availability

EVAL-AD5422LFEBZ is available at Aetrix Electronics and suitable for industrial process transmitters, HART-enabled field instruments, loop-powered sensor interfaces, and precision analog output validation requiring stable component supply and full-feature evaluation capability.

Supply support for EVAL-AD5422LFEBZ 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 (DSP) ICs, serving industrial, automotive, communications, and healthcare markets with precision data conversion and signal conditioning solutions.

The EVAL-AD5422LFEBZ belongs to Analog Devices' precision DAC evaluation platform family, engineered specifically to accelerate development of 4–20 mA and bipolar voltage output systems compliant with industrial process control standards including HART physical layer requirements.

FAQ

What is the primary function of the EVAL-AD5422LFEBZ?

The EVAL-AD5422LFEBZ is a dedicated evaluation board for the AD5422 16-bit current source and voltage output DAC. It enables full functional verification of the AD5422's programmable 4 mA–20 mA current loop, ±10 V voltage output, HART compatibility, and fault diagnostics - using either USB PC control or external SPI interface. The board includes all necessary support circuitry, including ADR435 reference and AD7321 ADC for real-time output monitoring, making EVAL-AD5422LFEBZ ideal for transmitter design validation.

Does the EVAL-AD5422LFEBZ support both TSSOP and LFCSP packages of the AD5422?

No - the EVAL-AD5422LFEBZ is specifically configured for the AD5422 in the 40-lead LFCSP package. A separate board, EVAL-AD5422EBZ, supports the 24-lead TSSOP variant. The schematic (Figure 8), bill of materials (Table 5), and user guide explicitly identify U1 as "AD5422BCPZ" (LFCSP part number), confirming EVAL-AD5422LFEBZ's exclusive compatibility with the LFCSP footprint and pinout.

How is the EVAL-AD5422LFEBZ powered, and what supply ranges are supported?

EVAL-AD5422LFEBZ requires multiple independent supplies: AVDD (10.8 V–40 V), AVSS (0 V or −26.4 V), V+ (10.8 V–16.5 V), and V− (0 V or −16.5 V). Digital circuitry can be powered via USB (5 V, default) or external 5 V/3.3 V via J7 or LK8. Link options LK9 and LK16 protect ADR435 and AD7321 from overvoltage when AVDD > 16.5 V or |AVSS| > 16.5 V - ensuring safe operation across the full AD5422 analog supply range.

Can the EVAL-AD5422LFEBZ measure both voltage and current outputs simultaneously?

Yes - the EVAL-AD5422LFEBZ integrates the AD7321BRUZ 12-bit ADC to monitor both outputs: VOUT is routed to VIN0 via LK14, and IOUT is sensed across a 51 Ω shunt (LK5 in Position B) and fed to VIN1. Software displays measured values in volts and milliamperes with ~1% accuracy, providing immediate feedback during DAC programming without external test equipment - a core capability confirmed in the "Measure Output Voltage/Current" section of UG-442.

Is PC software provided for the EVAL-AD5422LFEBZ, and what OS versions does it support?

Yes - Analog Devices provides self-installing Windows evaluation software compatible with Windows 2000, NT, and XP. The software provides full register-level control (Input, Control, Status, Reset), real-time output programming (voltage/current), and measurement readback. Installation must precede USB connection to ensure proper driver recognition. No Linux or macOS support is included or referenced in UG-442 Rev. C.