Analog Devices Inc. EVAL-AD5755-1SDZ

Overview

EVAL-AD5755-1SDZ from Analog Devices is a full-featured evaluation board for the AD5755-1 quad-channel, 16-bit, serial-input, 4 mA to 20 mA and voltage-output DAC with dynamic power control and HART connectivity. It supports PC-based control via USB using the System Demonstration Platform (SDP) and AD575X evaluation software, and provides per-channel DC-to-DC boost, configurable link options, and dual output modes (current/voltage) for industrial process control validation.

For engineers reviewing the EVAL-AD5755-1SDZ datasheet, EVAL-AD5755-1SDZ pinout, EVAL-AD5755-1SDZ application, or EVAL-AD5755-1SDZ equivalent, this board enables rapid functional verification of HART-compatible current-loop outputs, dynamic power-controlled voltage sourcing, per-channel slew rate configuration, and SPI-based register-level control of the AD5755-1 DAC under real-world supply conditions (±15 V analog, 3.3 V digital, 5 V reference).

Technical Context

The EVAL-AD5755-1SDZ implements hardware-level interface bridging between a Windows-hosted AD575X evaluation GUI and the AD5755-1 IC via the SDP board's Blackfin-based SPI bridge. It replicates the full signal chain: AVDD/AVSS analog supplies (−15 V/+15 V), AVCC (5 V) for four independent DC-to-DC boost converters, and DVDD (3.3 V) sourced from SDP - all decoupled with 10 μF + 0.1 μF capacitors per supply rail.

Board-level configurability includes jumper-selectable reference sources (internal DAC ref, external, or on-board ADR02), per-channel +VSENSE/VOUT linking, CHART pin access for HART coupling, and VBOOST routing options (AVDD or internal dc-dc). Default link settings are preconfigured for AD5755-1 operation, including LK4–LK11 setup for voltage output mode and CHART pin enablement.

Key Specifications

Availability

EVAL-AD5755-1SDZ is available at Aetrix Electronics and suitable for industrial process automation, loop-powered transmitter development, HART-compliant field instrument validation, and precision analog output module prototyping requiring stable component supply and traceable evaluation infrastructure.

Supply support for EVAL-AD5755-1SDZ 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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement, industrial, communications, and automotive applications.

The EVAL-AD5755-1SDZ belongs to Analog Devices' precision DAC evaluation platform family, designed specifically to accelerate development of 4–20 mA/HART-enabled process control systems and validate dynamic power control, multi-range voltage/current output, and robust SPI register programming of the AD5755-1 IC.

FAQ

What is the primary function of the EVAL-AD5755-1SDZ evaluation board?

The EVAL-AD5755-1SDZ evaluation board is a dedicated hardware platform for functional and parametric validation of the AD5755-1 quad-channel 16-bit DAC. It enables complete register-level control, HART signal coupling verification via CHART pins, dynamic power-controlled current/voltage output testing, and per-channel DC-to-DC boost configuration - all through the AD575X evaluation software and System Demonstration Platform (SDP) interface. The EVAL-AD5755-1SDZ does not operate standalone and requires connection to an SDP board and Windows PC.

Which DAC variants does the EVAL-AD5755-1SDZ support besides the AD5755-1?

The EVAL-AD5755-1SDZ supports three DAC variants: AD5755, AD5755-1, and AD5757. Jumper configurations (LK0–LK15) must be adjusted per device - for example, LK5/LK7/LK9/LK11 are removed for AD5755-1 to disable –VSENSE functionality, while LK4/LK6/LK8/LK10 remain inserted to route +VSENSE to VOUT. The board ships with default links set for AD5755-1 operation, and software auto-detects the selected device to expose correct register controls and features like CHART pin enablement.

How is HART connectivity implemented on the EVAL-AD5755-1SDZ?

HART connectivity on the EVAL-AD5755-1SDZ is implemented via dedicated CHART input pins (A2, B2, C2, D2) routed per channel to the AD5755-1's HART-capable current output stage. These pins accept capacitively coupled HART FSK signals as specified in the AD5755-1 datasheet. The board provides direct screw-terminal access to each CHART pin, and default jumper settings (LK2 inserted, LK5/LK7/LK9/LK11 removed) ensure proper biasing and isolation for HART signal injection without affecting DAC output integrity during 4–20 mA loop operation.

What power supplies are required to operate the EVAL-AD5755-1SDZ?

The EVAL-AD5755-1SDZ requires four distinct power inputs: AVDD (+10.8 V to +33 V, nominal +15 V), AVSS (−10.8 V to −26.4 V, nominal −15 V or 0 V for unipolar AD5755-1 mode), AVCC (+4.5 V to +5.5 V, nominal +5 V for DC-to-DC circuitry), and DVDD (+2.7 V to +5.5 V, nominal +3.3 V supplied by the SDP board via J9). All supplies are individually decoupled with 10 μF and 0.1 μF capacitors, and AGND/PGND/DGND planes are isolated then joined at designated star points per the board layout.

Can the EVAL-AD5755-1SDZ be used without a PC or SDP board?

No - the EVAL-AD5755-1SDZ lacks onboard microcontroller or autonomous firmware and requires real-time command translation via the System Demonstration Platform (SDP) board. However, the AD575X evaluation software includes a Demonstration Mode that simulates register behavior and GUI interaction when the EVAL-AD5755-1SDZ and SDP are disconnected. This mode allows users to explore software features, configure virtual registers, and study programming sequences - but no actual DAC output or hardware control occurs without physical SDP and PC connection.