Analog Devices Inc. EVAL-AD79X4CBZ

Overview

EVAL-AD79X4CBZ from Analog Devices is a full-featured evaluation board designed to characterize the AD7924 (12-bit), AD7914 (10-bit), and AD7904 (8-bit) 4-channel, 1 MSPS SAR ADCs. It supports standalone or controller-coupled operation, includes on-board analog buffering (AD712/AD713), dual voltage references (AD780/REF192), and provides BNC sockets for all four analog inputs (VIN0–VIN3), REFIN, SCLK, CS, DIN, DOUT, and bias-up circuits for bipolar signal conditioning.

For engineers reviewing the EVAL-AD79X4CBZ datasheet, EVAL-AD79X4CBZ pinout, EVAL-AD79X4CBZ application, or EVAL-AD79X4CBZ equivalent, this board enables rapid functional validation, AC/DC performance testing (SNR, THD, histogram), serial interface timing verification, and reference/buffering circuit co-design with production-grade ADCs in industrial data acquisition, sensor interface, and mixed-signal prototyping.

Technical Context

The EVAL-AD79X4CBZ interfaces directly with the EVAL-CONTROL-BRD2 via a standardized 96-way edge connector, supporting serial SPI-like communication (SCLK, DIN, DOUT, CS) and delivering synchronized power (AVDD, ±12 V, VDRIVE, DGND, AGND). Its configurable link options (LK1–LK20) allow precise control over reference selection (AD780 vs. REF192), supply sourcing, signal routing, and input termination (51 Ω).

On-board analog signal conditioning includes two independent bias-up circuits for bipolar-to-unipolar conversion, op-amp buffered inputs, and socketed ADC placement enabling direct substitution of AD7924/AD7914/AD7904. The board supports both normal mode (single-channel) and sequencer mode (multi-channel) operation, with software-configurable sampling frequency up to 1 MSPS and real-time FFT/histogram analysis.

Key Specifications

Availability

EVAL-AD79X4CBZ is available at Aetrix Electronics and suitable for industrial data acquisition systems, sensor interface prototyping, and mixed-signal test bench development requiring stable component supply, traceable evaluation hardware, and long-term design-in support.

Supply support for EVAL-AD79X4CBZ 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, serving industrial, automotive, communications, and healthcare markets.

This evaluation board belongs to Analog Devices' precision data converter evaluation platform family, engineered to accelerate ADC characterization, reference/buffering circuit validation, and system-level interface integration for engineers designing high-fidelity measurement systems.

FAQ

What ADC devices does the EVAL-AD79X4CBZ support?

The EVAL-AD79X4CBZ supports three pin-compatible SAR ADCs: AD7924 (12-bit), AD7914 (10-bit), and AD7904 (8-bit), all in 24-lead TSSOP packages. Each device is supplied as a sample in the kit and installed into the same socket on the EVAL-AD79X4CBZ board, enabling direct comparison of resolution, noise, and linearity across the family without PCB changes.

Does the EVAL-AD79X4CBZ require the EVAL-CONTROL-BRD2 to operate?

No - the EVAL-AD79X4CBZ can operate in standalone mode using external supplies (2.7–5 V for VDD, ±12 V for op amps, and VDRIVE) and external control signals (SCLK, CS, DIN). However, full functionality-including automated sampling, FFT/histogram analysis, and GUI-driven configuration-requires connection to the EVAL-CONTROL-BRD2 via its 96-way edge connector.

How are analog input signals conditioned on the EVAL-AD79X4CBZ?

The EVAL-AD79X4CBZ provides two independent bias-up circuits (for VIN0/VIN1 and VIN2/VIN3) that convert bipolar input ranges (e.g., ±2.5 V) to unipolar levels compatible with the AD79x4's 0–REFIN input range. Input buffering is performed by AD712 (single) and AD713 (quad) op amps, with link-selectable grounding (LK1–LK4) and 51 Ω termination (LK15–LK20) for impedance matching.

What reference options are available on the EVAL-AD79X4CBZ?

The EVAL-AD79X4CBZ integrates two precision references: AD780 (2.5 V or 3.0 V, selected via LK14) and REF192 (2.5 V). LK5 determines which reference drives the ADC's REFIN pin and bias-up circuits, allowing engineers to evaluate SNR, INL, and gain error sensitivity to reference voltage, noise, and temperature drift under identical test conditions.

Can the EVAL-AD79X4CBZ be used for production applications?

No - the EVAL-AD79X4CBZ is strictly intended for evaluation and development purposes. Analog Devices explicitly states it is "not authorized for use in life support devices or systems" and is supplied "as is" without warranties. Its layout, component selection, and lack of production-grade qualification preclude deployment in end equipment; it serves only to de-risk ADC selection and interface design prior to custom PCB implementation.