Analog Devices Inc. EVAL-AD5321DBZ

Overview

EVAL-AD5321DBZ from Analog Devices is a dedicated daughterboard evaluation kit for the AD5321 12-bit, single-channel, voltage-output DAC in a 6-lead SOT-23 package (AD5321BRTZ). It provides I²C interface support, on-board reference selection (2.5 V, 4.096 V, 5 V, or VDD), and configurable power-down modes, enabling rapid prototyping of precision analog output circuits in industrial sensor calibration and process control systems.

For engineers reviewing the EVAL-AD5321DBZ datasheet, EVAL-AD5321DBZ pinout, EVAL-AD5321DBZ application, or EVAL-AD5321DBZ equivalent, this board supports PC-based DAC register programming via SDP-B controller, real-time power-down mode configuration, flexible reference sourcing, and hardware-level link-based setup for analog/digital supply and ground isolation - all critical for validating DAC performance in mixed-signal embedded designs.

Technical Context

The EVAL-AD5321DBZ operates as a daughterboard requiring the EVAL-MBnanoDAC-SDZ motherboard and EVAL-SDP-CB1Z controller board. It interfaces exclusively via I²C (SCL/SDA) with the AD5321BRTZ DAC, supporting full 12-bit resolution and three programmable power-down states (1 µA, 2 µA, or 100 nA).

Power architecture separates analog (VDD, VSS, AGND) and digital (VLOGIC, DGND) domains, with decoupling using 10 µF tantalum and 0.1 µF ceramic capacitors per supply rail. Link LK1 sets the I²C address LSB (default low), while REF1–REF4 links select reference source per channel.

Key Specifications

Availability

EVAL-AD5321DBZ is available at Aetrix Electronics and suitable for industrial sensor calibration, closed-loop process control, and precision instrumentation applications requiring stable component supply and validated DAC evaluation infrastructure.

Supply support for EVAL-AD5321DBZ 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) technologies, headquartered in Norwood, MA, with deep expertise in precision data conversion and signal conditioning.

EVAL-AD5321DBZ belongs to the nanoDAC® evaluation platform family, designed specifically to accelerate development of low-power, high-accuracy DAC applications in industrial automation, medical instrumentation, and test equipment.

FAQ

What hardware is required to operate the EVAL-AD5321DBZ?

The EVAL-AD5321DBZ requires the EVAL-MBnanoDAC-SDZ motherboard and the EVAL-SDP-CB1Z SDP-B controller board to function. The SDP-B board connects to a Windows PC via USB and provides the I²C interface and power to the EVAL-AD5321DBZ. Without these components, the EVAL-AD5321DBZ cannot perform hardware-based DAC evaluation - though its software supports simulation-only mode.

Does the EVAL-AD5321DBZ include the AD5321 IC?

Yes, the EVAL-AD5321DBZ includes the AD5321BRTZ - a 12-bit, single-channel, voltage-output DAC in a 6-lead SOT-23 package - mounted directly on the daughterboard. This is the exact device under evaluation, not a placeholder or socketed variant. The board's schematics and BOM explicitly list U1 as AD5321BRTZ.

How is reference voltage selected on the EVAL-AD5321DBZ?

Reference voltage selection is controlled by four jumper links (REF1–REF4) located on the EVAL-MBnanoDAC-SDZ motherboard, not on the EVAL-AD5321DBZ itself. Each link chooses between VDD, 2.5 V, 4.096 V, 5 V, or external reference (EXT) for one of the four reference inputs routed to the daughterboard. Default configuration uses EXT for all four.

Can the EVAL-AD5321DBZ be used without connecting to a PC?

No - the EVAL-AD5321DBZ has no standalone operation capability. It lacks onboard microcontroller, clock source, or user interface. All DAC register writes, power-down control, and output configuration require the EVAL-AD5321DBZ evaluation software running on a Windows PC and communicating via the SDP-B controller board over USB.

What is the role of LK1 on the EVAL-AD5321DBZ daughterboard?

LK1 sets the A0 pin state of the AD5321BRTZ, determining the LSB of its 7-bit I²C address. Position B (default) pulls A0 low, resulting in I²C address 0x0D; position A pulls A0 high for address 0x0F. This enables multiple EVAL-AD5321DBZ boards to coexist on the same I²C bus when used with compatible motherboard routing.