Analog Devices Inc. EVAL-AD7172-2SDZ

Overview

EVAL-AD7172-2SDZ from Analog Devices is a USB-connected evaluation kit for the AD7172-2 24-bit, 31.25 kSPS sigma-delta ADC with true rail-to-rail analog input buffers, integrated 2.5 V reference, and on-board LDO regulation delivering 5 V, 3.3 V, and −2.5 V supplies. It supports standalone operation and PC-based evaluation via the EVAL-SDP-CB1Z (SDP-B) controller board.

For engineers reviewing the EVAL-AD7172-2SDZ datasheet, EVAL-AD7172-2SDZ pinout, EVAL-AD7172-2SDZ application, or EVAL-AD7172-2SDZ equivalent, this kit enables rapid validation of high-precision dc and low-frequency sensor signal chains in industrial process control, weigh scales, and precision instrumentation systems requiring <10 ppm INL and 105 dB SNR at 10 SPS.

Technical Context

The EVAL-AD7172-2SDZ integrates the AD7172-2 ADC with full SPI interface connectivity to the SDP-B controller board, supporting real-time register configuration and waveform capture. On-board power sequencing includes ADP7118 (5 V/3.3 V), ADP7182 (−2.5 V), and ADM660 (−5 V) regulators, enabling single-supply (7–9 V) or split-supply (±2.5 V + 3.3 V) operation.

It provides flexible analog input routing via J6 terminal block and A0–A4 SMB connectors, configurable gain stages using ADA4528-2 and AD8475 amplifier options, and on-board noise test modes (LK8–LK12) that short inputs to REFOUT for zero-input performance characterization.

Key Specifications

Availability

EVAL-AD7172-2SDZ is available at Aetrix Electronics and suitable for precision sensor interface evaluation, industrial data acquisition system prototyping, and metrology-grade ADC validation requiring stable component supply and full technical support.

Supply support for EVAL-AD7172-2SDZ 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-AD7172-2SDZ belongs to Analog Devices' precision ADC evaluation platform family, designed specifically to accelerate development of high-resolution, low-noise measurement systems for industrial automation, scientific instrumentation, and energy monitoring.

FAQ

What is the primary function of the EVAL-AD7172-2SDZ?

The EVAL-AD7172-2SDZ is a fully featured evaluation kit for the AD7172-2 24-bit sigma-delta ADC. It enables engineers to configure, characterize, and validate the device's performance-including INL, noise, settling time, and reference stability-using the AD717x Eval+ software and SDP-B controller. The EVAL-AD7172-2SDZ supports both lab-based and standalone testing with flexible power and analog input options.

Which host controller is required to operate the EVAL-AD7172-2SDZ?

The EVAL-AD7172-2SDZ requires the EVAL-SDP-CB1Z (SDP-B) controller board to interface with a Windows PC via USB. The SDP-B provides SPI communication, power management, and GPIO control for the AD7172-2. No other host controller is supported-the EVAL-AD7172-2SDZ is not a standalone USB device and does not include an onboard USB interface controller.

Does the EVAL-AD7172-2SDZ support split-supply operation?

Yes, the EVAL-AD7172-2SDZ 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 enabled by removing R49–R51, inserting 0 Ω resistors at R67/R85, setting LK1 to Position B, and applying appropriate voltages to J9. The on-board ADP7182 LDO generates −2.5 V, and ADM660 provides −5 V for biasing.

Can the EVAL-AD7172-2SDZ be used without connecting to a PC?

Yes, the EVAL-AD7172-2SDZ supports limited standalone operation. With the SDP-B disconnected, users can access test points for SPI signals (CS, SCLK, DIN, DOUT/RDY) and analog inputs, or use the PMOD-compatible header (A7) for integration into custom digital capture systems. However, full functionality-including register configuration, real-time analysis, and noise metrics-requires the AD717x Eval+ software running on a Windows PC.

What software is included with the EVAL-AD7172-2SDZ?

The EVAL-AD7172-2SDZ ships with AD717x Eval+ evaluation software on CD, which provides an interactive GUI for configuring the AD7172-2 registers, capturing time-domain waveforms, generating histograms, performing noise analysis (rms, peak-to-peak, ENOB), and visualizing filter step response. It supports simulation mode for all AD717x-family devices, including the AD7172-2, even without hardware connected.