Analog Devices Inc. EVAL-AD7476CBZ

Overview

EVAL-AD7476CBZ from Analog Devices is a dedicated evaluation board for the AD7476 12-bit, 1 MSPS successive approximation ADC. It provides full signal chain support including on-board OP467 analog input buffering, dual precision voltage references (AD780 at 2.5 V/3 V and REF195 at 5 V), and configurable bias-up circuitry for bipolar-to-unipolar conversion. Designed for lab-based ADC performance validation in high-speed data acquisition systems.

For engineers reviewing the EVAL-AD7476CBZ datasheet, EVAL-AD7476CBZ pinout, EVAL-AD7476CBZ application, or EVAL-AD7476CBZ equivalent, this board enables rapid functional verification, SNR/THD characterization, FFT/histogram analysis, and interface timing validation with the EVAL-CONTROL-BRD2 controller via its standardized 96-way DIN41612 connector.

Technical Context

The EVAL-AD7476CBZ implements a complete analog front-end for the AD7476, featuring dual independent reference paths (AD780 and REF195), an OP467 quad op amp for low-noise signal conditioning, and a configurable bias-up stage to shift ±V_IN inputs to 0–V_DD range at the ADC's VIN pin. All analog and digital grounds are separated and joined at a single point near the AD7476 to minimize noise coupling.

It supports both standalone operation (via external ±12 V, AVDD, DVDD, AGND, DGND) and controller-driven mode using the EVAL-CONTROL-BRD2 through a 96-pin edge connector. Link options LK1–LK12 configure reference selection, termination, power sourcing, clock inversion, and bias voltage routing - enabling precise adaptation to test conditions without soldering.

Key Specifications

Availability

EVAL-AD7476CBZ is available at Aetrix Electronics and suitable for high-speed data acquisition prototyping, ADC dynamic performance validation, and mixed-signal system integration requiring stable component supply and traceable evaluation hardware.

Supply support for EVAL-AD7476CBZ 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.

The EVAL-AD7476CBZ belongs to Analog Devices' precision data converter evaluation platform family, engineered to accelerate design-in of SAR ADCs in test instrumentation, medical imaging, and industrial automation applications.

FAQ

What is the primary function of the EVAL-AD7476CBZ?

The EVAL-AD7476CBZ is a dedicated evaluation board for the AD7476 12-bit, 1 MSPS SAR ADC. It provides all necessary analog signal conditioning, precision voltage references, configurable biasing, and digital interface infrastructure to validate ADC performance - including SNR, THD, INL, DNL, and timing behavior - under real-world lab conditions. The EVAL-AD7476CBZ does not operate as a standalone product but serves exclusively as a characterization tool.

Which ADC devices does the EVAL-AD7476CBZ support?

The EVAL-AD7476CBZ is specifically designed for the AD7476 12-bit ADC and shares hardware compatibility with the AD7477 10-bit variant, as confirmed by Analog Devices' documentation and bill of materials. Both devices use identical pinouts and interface protocols, allowing the same EVAL-AD7476CBZ board to evaluate either IC depending on socketed U1 configuration. The EVAL-AD7476CBZ is not compatible with other ADC families or higher-resolution SAR converters.

Does the EVAL-AD7476CBZ require the EVAL-CONTROL-BRD2 to operate?

No - the EVAL-AD7476CBZ can operate in standalone mode using external ±12 V, AVDD, DVDD, and ground supplies applied via J5 and J6 connectors. However, full functionality including serial communication, sample capture, FFT/histogram analysis, and software control requires connection to the EVAL-CONTROL-BRD2 via the 96-way edge connector (J4). Standalone use is limited to analog signal path validation without digital readout.

What reference voltages are provided on the EVAL-AD7476CBZ?

The EVAL-AD7476CBZ integrates two precision references: the AD780 (programmable 2.5 V or 3 V output, selected via LK2) and the REF195 (fixed 5 V output). These references feed the AD7476's reference input and optionally its VDD supply (via LK4/LK12), enabling flexible full-scale range selection (e.g., 0–2.5 V, 0–3 V, or 0–5 V) and accurate DC accuracy testing. The AD780 may be replaced with AD680 per design notes.

Can the EVAL-AD7476CBZ evaluate bipolar input signals?

Yes - the EVAL-AD7476CBZ includes a dedicated bias-up circuit with configurable dc offset (via LK5) and input routing (via LK11). When configured, it accepts bipolar analog inputs (e.g., ±2.5 V) at the VIN SMB socket and shifts them to a unipolar 0–VDD range at the VBIASED socket, which connects directly to the AD7476's VIN pin. This allows accurate evaluation of the EVAL-AD7476CBZ with ac-coupled or differential sources without external level-shifting circuitry.