Analog Devices Inc. EVAL-AD7091R-8SDZ

Overview

EVAL-AD7091R-8SDZ from Analog Devices is a full-featured evaluation board for the AD7091R-8 12-bit ultralow power successive approximation ADC, supporting standalone operation and SDP-based PC control via USB. It integrates on-board power supplies (5 V LDO, 3.3 V regulator), precision reference (REF193), rail-to-rail op amps (AD8031/AD8032), and configurable analog input routing for up to eight unipolar or bipolar channels - enabling rapid validation of sensor signal chains in industrial monitoring systems.

For engineers reviewing the EVAL-AD7091R-8SDZ datasheet, EVAL-AD7091R-8SDZ pinout, EVAL-AD7091R-8SDZ application, or EVAL-AD7091R-8SDZ equivalent, this page delivers verified hardware configuration details, interface requirements with EVAL-SDP-CB1Z, power supply setup options (9 V DC jack, external VDD/VDRIVE), analog input termination settings (51 Ω resistors at VIN0–VIN7, BIPOLAR IN), and software-controlled acquisition modes including histogram and FFT analysis.

Technical Context

The EVAL-AD7091R-8SDZ implements a complete signal chain for the AD7091R-8 ADC, featuring dual-stage analog conditioning: front-end buffering via AD8032 (dual) and AD8031 (single) rail-to-rail op amps, followed by multiplexer selection (VIN0–VIN7), bias-up circuitry for bipolar inputs, and ADCIN routing through configurable links (LK13/LK14). Power management includes ADP3303 LDO (5 V) and on-board 3.3 V regulation, with separate AGND/DGND planes joined at a single point near the ADC.

Interface is standardized via J13 - a 120-way connector compatible with EVAL-SDP-CB1Z - enabling SPI-like serial communication (CS, CONVST, SCLK, SDI, SDO) and digital supply (VDRIVE) handshaking. All link options (LK1–LK18, SL1–SL20) are physically implemented for precise control over op amp supplies, reference source (internal vs. REF193), termination, buffering, and ADC input path selection.

Key Specifications

Availability

EVAL-AD7091R-8SDZ is available at Aetrix Electronics and suitable for industrial sensor interface validation, embedded data acquisition prototyping, and low-power ADC performance benchmarking requiring stable component supply and full documentation traceability.

Supply support for EVAL-AD7091R-8SDZ 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 and control applications.

The EVAL-AD7091R-8SDZ belongs to Analog Devices' evaluation kit product line, designed specifically to accelerate development with their ultralow power, high-speed SAR ADCs - emphasizing ease of use, signal integrity, and seamless integration with system demonstration platforms.

FAQ

What is the primary function of the EVAL-AD7091R-8SDZ?

The EVAL-AD7091R-8SDZ is an evaluation board engineered exclusively for the AD7091R-8 12-bit SAR ADC. It provides a complete, ready-to-use hardware platform with on-board power regulation, precision reference, analog signal conditioning, and SDP-based PC interface - enabling engineers to validate dynamic performance, input range behavior, and serial interface timing without custom PCB design. The EVAL-AD7091R-8SDZ supports both standalone and host-controlled operation.

Which system demonstration platform is required to operate the EVAL-AD7091R-8SDZ?

The EVAL-AD7091R-8SDZ requires the EVAL-SDP-CB1Z system demonstration platform board for USB-based PC control and data acquisition. This connection is made via the J13 120-way connector, and the EVAL-SDP-CB1Z must be ordered separately. The EVAL-AD7091R-8SDZ does not include onboard USB connectivity - its digital interface relies entirely on the SDP board for host communication, register access, and real-time waveform capture.

Can the EVAL-AD7091R-8SDZ operate without the EVAL-SDP-CB1Z board?

Yes, the EVAL-AD7091R-8SDZ supports standalone operation using test points and direct signal injection. Users can apply external clock, CONVST, CS, and power signals to evaluate the AD7091R-8 independently - for example, integrating it into custom microcontroller-based systems. However, full functionality including automated data capture, FFT/histogram analysis, and register configuration requires the EVAL-SDP-CB1Z and associated PC software. Standalone mode lacks GUI-driven control or visualization.

What analog input configurations does the EVAL-AD7091R-8SDZ support?

The EVAL-AD7091R-8SDZ supports eight unipolar analog inputs (VIN0–VIN7) accessible via dedicated connectors (J5–J8, J16–J19), each configurable with 51 Ω termination and optional unity-gain buffering. It also supports bipolar input via J10 (BIPOLAR IN), which routes through internal bias-up circuitry to shift the signal to 0–2.5 V before ADC sampling. All analog paths are routed through physical links (SL1–SL20, LK13/LK14) allowing precise signal chain customization per channel.

What power supply options are available for the EVAL-AD7091R-8SDZ?

The EVAL-AD7091R-8SDZ accepts power via a 9 V DC wall adapter (included) connected to J1, feeding on-board ADP3303 and 3.3 V regulators. Alternatively, users may supply external VDD (2.7–5.25 V) to J9 and VDRIVE (1.65–5.25 V, or 3.3 V ±5% when paired with EVAL-SDP-CB1Z) to J4. Link options LK3, LK8, LK9, and LK11 determine source selection for VDD and VDRIVE, while LK1/LK2 configure op amp supply rails - all documented in Table 2 of UG-633.