Analog Devices Inc. EVAL-AD7091R-2SDZ

Overview

EVAL-AD7091R-2SDZ from Analog Devices is a full-featured evaluation board designed specifically for the AD7091R-2 12-bit ultralow power successive approximation ADC. It supports standalone operation and SDP-based PC control via EVAL-SDP-CB1Z, integrates on-board AD8031/AD8032 op amps, ADP3303 LDO, and REF193 3.0 V reference, and enables DC/AC testing including histogram and FFT analysis of converter performance.

For engineers reviewing the EVAL-AD7091R-2SDZ datasheet, EVAL-AD7091R-2SDZ hardware setup, EVAL-AD7091R-2SDZ software interface, or EVAL-AD7091R-2SDZ compatibility with EVAL-SDP-CB1Z, this page provides verified functional context, supply configuration guidance, signal routing options, and real-world test capability details essential for rapid ADC characterization and system integration validation.

Technical Context

The EVAL-AD7091R-2SDZ implements a complete analog front-end for the AD7091R-2, featuring dual-rail-to-rail op amp buffering (AD8031 single, AD8032 dual), configurable bias-up circuitry for bipolar input conditioning, and multiplexer-based channel selection across eight unipolar inputs (VIN0–VIN7). It supports both internal (2.5 V) and external reference modes via LK12 jumper.

Power management includes selectable VDD (2.7–5.25 V) and VDRIVE (1.65–5.25 V or fixed 3.3 V) sourcing via LK9/LK11 and LK3/LK8 links, on-board 5 V and 3.3 V regulators (ADP3303, REF193), and decoupling with 10 µF tantalum + 100 nF ceramic capacitors per rail. Ground separation maintains AGND/DGND isolation with single-point connection near the ADC.

Key Specifications

Availability

EVAL-AD7091R-2SDZ is available at Aetrix Electronics and suitable for precision data acquisition, industrial sensor interface, and portable instrumentation applications requiring stable component supply, traceable sourcing, and long-term evaluation platform continuity.

Supply support for EVAL-AD7091R-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 Norwood, MA, with design and manufacturing operations worldwide.

The EVAL-AD7091R-2SDZ belongs to Analog Devices' precision ADC evaluation platform family, engineered to accelerate prototyping and validation of ultralow-power, high-accuracy data conversion systems in resource-constrained environments.

FAQ

What is the primary function of the EVAL-AD7091R-2SDZ?

The EVAL-AD7091R-2SDZ is a dedicated evaluation board for the AD7091R-2 12-bit SAR ADC. It provides complete hardware infrastructure-including signal conditioning, power regulation, reference generation, and SDP interface-to enable rapid functional verification, parametric testing (e.g., INL/DNL, SNR, THD), and system-level integration assessment without custom PCB development. The board directly supports the AD7091R-2's native serial interface and register map.

Which host interface does the EVAL-AD7091R-2SDZ require to operate with a PC?

The EVAL-AD7091R-2SDZ requires the EVAL-SDP-CB1Z System Demonstration Platform board as an intermediary USB-to-SPI bridge. It connects via the 120-way J13 header and relies on Analog Devices' proprietary SDP firmware and Windows evaluation software. No direct USB or UART interface is implemented on the EVAL-AD7091R-2SDZ itself - standalone use is limited to manual signal injection and test point probing.

Can the EVAL-AD7091R-2SDZ evaluate bipolar input signals?

Yes - the EVAL-AD7091R-2SDZ includes dedicated bias-up circuitry accessible via J10 (BIPOLAR IN) and J14 (UNIPOLAR OUT). When a bipolar signal is applied to J10, it is level-shifted by +VREF/2 (1.25 V when using internal 2.5 V reference) and routed to any unipolar ADC input (e.g., J5–J8 or J16–J19). This allows full-scale utilization of the AD7091R-2's 0 V to VREF input range for ±1.25 V signals.

What power supplies are needed to operate the EVAL-AD7091R-2SDZ?

The EVAL-AD7091R-2SDZ ships with a 9 V dc wall adapter that connects to J1 and powers all on-board regulators (5 V and 3.3 V). When used with EVAL-SDP-CB1Z, only this 9 V supply is required. For standalone operation, external 2.7–5.25 V must be applied to VDD (via J9 or LK9/LK11), and 1.65–5.25 V (or 3.3 V) to VDRIVE (via J4 or LK3/LK8), with proper AGND/DGND connection and decoupling.

Does the EVAL-AD7091R-2SDZ support all three members of the AD7091R-x family?

No - while the EVAL-AD7091R-2SDZ shares mechanical layout and core circuitry with EVAL-AD7091R-4SDZ and EVAL-AD7091R-8SDZ, it is electrically configured and validated specifically for the AD7091R-2 (2-channel variant). Pinout, multiplexer routing, and default link settings (e.g., LK13/LK14) are optimized for the AD7091R-2's channel count and register structure. Use of AD7091R-4 or AD7091R-8 on this board is not supported per UG-633.