Analog Devices Inc. EVAL-AD7866CB

Overview

EVAL-AD7866CB from Analog Devices is a fully featured evaluation board for the AD7866 dual 12-bit, 1 MSPS SAR ADC. It provides on-board analog buffering, dual precision reference (AD780), bias-up circuitry for bipolar inputs, and serial interface control via a 96-way edge connector. Designed for lab validation of high-speed data acquisition in industrial and instrumentation systems.

For engineers reviewing the EVAL-AD7866CB datasheet, EVAL-AD7866CB pinout, EVAL-AD7866CB application, or EVAL-AD7866CB equivalent, this page delivers verified hardware configuration details, link setup guidance, software integration notes, and interface compatibility with the EVAL-BOARD CONTROLLER - all critical for rapid ADC characterization and system-level timing validation.

Technical Context

The EVAL-AD7866CB implements full signal chain support for the AD7866 dual-channel SAR ADC, including independent analog input routing (VA1/VA2/VB1/VB2), selectable unipolar/bipolar operation via bias-up circuits, and configurable reference sourcing (internal AD780 ±2.5 V/±3 V or external). All analog and digital grounds are separated and joined at a single point near the AD7866 to minimize noise coupling.

It supports both standalone and controller-coupled operation: when used with the EVAL-BOARD CONTROLLER, all power (AVDD, DVDD, ±12 V), clocks (SCLK), frame sync (TFS0), flags (FL0/FL1), and data lines (DR0/DR1) are delivered through the 96-way connector; standalone mode requires external supply connections via J2–J5 and manual link configuration per Table I.

Key Specifications

Availability

EVAL-AD7866CB is available at Aetrix Electronics and suitable for high-speed data acquisition validation, precision sensor interface prototyping, and mixed-signal test bench development requiring stable component supply and full evaluation infrastructure.

Supply support for EVAL-AD7866CB 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-AD7866CB belongs to Analog Devices' precision data converter evaluation platform family, designed specifically to accelerate development and characterization of high-speed, low-power SAR ADCs in industrial, medical, and test equipment applications.

FAQ

What is the primary function of the EVAL-AD7866CB?

The EVAL-AD7866CB is an evaluation board purpose-built for the AD7866 dual 12-bit, 1 MSPS SAR ADC. It enables complete functional validation, performance testing, and interface integration of the AD7866 in real-world signal chains. The board includes on-board analog buffering, dual reference options, bias-up circuitry for bipolar inputs, and full software-controlled operation - all centered around accurate, repeatable ADC characterization. EVAL-AD7866CB does not contain the AD7866 IC itself but hosts it as the core device under test.

How is the EVAL-AD7866CB powered, and what supply configurations are supported?

EVAL-AD7866CB supports two power modes: controller-coupled and standalone. In controller-coupled mode (via 96-way connector J1), it receives AVDD (+5 V), DVDD, ±12 V, AGND, and DGND directly from the EVAL-BOARD CONTROLLER. In standalone mode, external supplies must be applied via dedicated connectors: J2 (AVDD), J3 (DVDD), J4 (VDRIVE), and J5 (±12 V & AGND). Link settings LK9–LK11 and LK26–LK27 determine source selection, and all supplies are locally decoupled with 10 µF tantalum and 0.1 µF ceramic capacitors. EVAL-AD7866CB requires no onboard voltage regulation beyond these inputs.

Which software and configuration files are required to operate the EVAL-AD7866CB?

The EVAL-AD7866CB uses PC-based Windows software provided by Analog Devices, featuring a GUI with DSO display, FFT/histogram analysis, and sampling controls. Two configuration files are supplied: "AD7866.cfg" for 0–VREF input range and straight binary coding, and "AD7866-1.cfg" for 0–2×VREF range with 2's complement output. Loading the correct .cfg file sets sampling defaults, power requirements, and DSP program download. The software communicates via standard parallel port (LPT1/LPT2/PRN) using a Centronics cable. EVAL-AD7866CB operation is fully dependent on correct config file selection and matching link positions (e.g., LK13, LK12).

What are the key link options that affect analog input configuration on the EVAL-AD7866CB?

Link options LK1–LK4 select analog input sources for each of the four channels (VA1/VA2/VB1/VB2): position "A" routes BNC inputs directly to buffers; "B" or "C" routes them through bias-up circuitry for bipolar level-shifting; "C" or "D" ties inputs to AGND. LK20–LK25 configure bias-up reference sources (VREF, DCAPA/DCAPB, or AGND) and resistor ratios based on selected input range (0–VREF vs. 0–2×VREF). LK22/LK25 optionally add 50 Ω termination at bias-up inputs. These links must be set before power-up and matched to the loaded software configuration file. Incorrect settings on EVAL-AD7866CB will result in invalid conversions or saturation.

Is the EVAL-AD7866CB compatible with other Analog Devices evaluation controllers?

Yes - the EVAL-AD7866CB is explicitly designed for interoperability with the EVAL-BOARD CONTROLLER (order code EVAL-CONTROL BRD2), which provides all necessary power, clock, control, and data signals via the standardized 96-way edge connector. Its pinout (Table II) and link architecture align with Analog Devices' broader CB-series evaluation platform. While not guaranteed for third-party controllers, any host system replicating the J1 pin mapping - including FL0/FL1, SCLK0/TFS0, DR0/DR1, AVDD/DGND/AGND, and ±12 V - can interface with EVAL-AD7866CB in standalone mode using appropriate firmware and signal timing. Compatibility is limited to systems adhering to the documented 96-way interface specification.