Analog Devices Inc. EVAL-AD7172-4SDZ

Overview

EVAL-AD7172-4SDZ from Analog Devices is a fully featured evaluation kit for the AD7172-4 24-bit, 31.25 kSPS sigma-delta ADC with true rail-to-rail analog input and reference buffers, on-board LDO regulation (5 V, 3.3 V, –2.5 V), and external amplifier evaluation capability. It supports PC-based control via the EVAL-SDP-CB1Z (SDP-B) controller board and USB interface.

For engineers reviewing the EVAL-AD7172-4SDZ datasheet, EVAL-AD7172-4SDZ pinout, EVAL-AD7172-4SDZ application, or EVAL-AD7172-4SDZ equivalent, this board enables rapid validation of high-precision dc and low-frequency signal acquisition in sensor interfaces, weigh scales, and industrial process monitoring systems - with full register-level configuration, time-domain waveform analysis, histogram-based noise evaluation, and modelled performance simulation.

Technical Context

The EVAL-AD7172-4SDZ implements a hardware-linked evaluation platform centered on the AD7172-4 ADC, interfacing via SPI to the ADSP-BF527 processor on the SDP-B controller. It provides configurable single-supply (5 V/3.3 V) or split-supply (±2.5 V/3.3 V) operation using ADP7118, ADP7104, ADP7182, and ADM660 regulators, with decoupled power delivery at each IC.

It integrates dual analog signal conditioning paths: direct SMB/SMA inputs (A0–A4) and terminal-block inputs (J6), both routed through solder-link-selectable crosspoint multiplexers to the AD7172-4's 8-channel input mux. Reference options include the onboard ADR445 5 V precision reference or external references via dedicated SMB footprints.

Key Specifications

Availability

EVAL-AD7172-4SDZ is available at Aetrix Electronics and suitable for high-accuracy sensor interface validation, industrial process monitoring system prototyping, and precision weigh scale development requiring stable component supply and full evaluation infrastructure.

Supply support for EVAL-AD7172-4SDZ 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 Norwood, MA, with design and manufacturing operations worldwide.

The EVAL-AD7172-4SDZ belongs to Analog Devices' precision data acquisition evaluation platform family, designed specifically to accelerate development of high-resolution, low-noise measurement systems for industrial, scientific, and instrumentation applications.

FAQ

What is the primary function of the EVAL-AD7172-4SDZ?

The EVAL-AD7172-4SDZ is an evaluation kit for the AD7172-4 24-bit sigma-delta ADC. Its primary function is to enable rapid hardware and software validation of high-precision analog-to-digital conversion - including configuration, noise analysis, and performance benchmarking - using the AD7172-4 device under real-world supply, reference, and signal conditioning conditions. The EVAL-AD7172-4SDZ supports both PC-connected and standalone test modes.

Which controller board is required to operate the EVAL-AD7172-4SDZ?

The EVAL-AD7172-4SDZ requires the EVAL-SDP-CB1Z (SDP-B) controller board for USB-based PC operation. The SDP-B provides SPI interface translation, power sequencing, and host communication. The EVAL-AD7172-4SDZ connects to the SDP-B via a 120-pin Hirose FX8 connector (J1), and the AD717x Eval+ software communicates exclusively through this link. Standalone use bypasses the SDP-B via test points or the Pmod™ header (A7).

Does the EVAL-AD7172-4SDZ support split-supply operation?

Yes, the EVAL-AD7172-4SDZ supports split-supply operation with ±2.5 V analog supplies (AVDD1/AVDD2 = +2.5 V, AVSS = –2.5 V) and 3.3 V IOVDD. This is achieved by removing R49–R51, inserting 0 Ω resistors at R67/R85, setting LK1 to Position B, and configuring SL2/SL3/SL5 accordingly. The on-board ADP7182 LDO generates –2.5 V, and the ADP7118 provides +2.5 V and 3.3 V rails.

What reference voltage sources are supported by the EVAL-AD7172-4SDZ?

The EVAL-AD7172-4SDZ includes an onboard ADR445 5 V precision reference connected to REF+/REF−. It also supports external reference sources via two dedicated SMB/SMA footprints, allowing replacement of the ADR445. Reference selection is hardware-configurable, and the AD717x Eval+ software allows user-defined reference voltage values (Ext. REF fields) to ensure accurate scaling in waveform and histogram analysis.

Can the EVAL-AD7172-4SDZ be used without connecting to a PC?

Yes, the EVAL-AD7172-4SDZ supports standalone operation. With the SDP-B disconnected, users can access SPI signals (CS, SCLK, DIN, DOUT/RDY, SYNC) via labeled test points or the Pmod™-compatible header (A7) to interface with custom digital capture hardware. Additionally, the AD717x Eval+ software includes a simulation mode that models the EVAL-AD7172-4SDZ behavior without physical hardware connection.