Analog Devices Inc. EVAL-AD7734EBZ

Overview

EVAL-AD7734EBZ from Analog Devices is an evaluation board for the AD7734 24-bit sigma-delta ADC, designed to accelerate development of high-precision industrial data acquisition systems. It supports four single-ended analog inputs with ±10 V range, 18-bit p-p resolution at 500 Hz, on-chip per-channel calibration, and SPI/QSPI/MICROWIRE-compatible 3-wire serial interface. The board enables rapid validation of multiplexed sensor signal chains in PLCs and process control hardware.

For engineers reviewing the EVAL-AD7734EBZ datasheet, EVAL-AD7734EBZ pinout, EVAL-AD7734EBZ application, or EVAL-AD7734EBZ equivalent, this page delivers verified board-level specifications, functional context, supply chain readiness, and manufacturer-specific support details - all aligned with AD7734 Rev. B design requirements and industrial temperature operation (–40°C to +105°C).

Technical Context

The EVAL-AD7734EBZ implements a complete test platform for the AD7734 IC, including its 28-lead TSSOP footprint, full analog input conditioning (±10 V overvoltage tolerance up to ±16.5 V), differential reference input with "No-Reference" detect, and configurable chopping mode for noise-throughput trade-offs. It routes all 28 pins-including SYNC/P1, MCLKIN/MCLKOUT, AIN0–AIN3, REFIN(±), and digital I/O P0/P1-to accessible test points and headers.

Board-level features include on-board crystal oscillator (6.144 MHz), selectable AVDD/DVDD supplies (5 V or 3 V), AGND/DGND separation, Schmitt-triggered logic inputs, and hardware reset circuitry. It supports all AD7734 operating modes: single conversion, continuous read, dump mode, and per-channel system calibration via the serial interface.

Key Specifications

Availability

EVAL-AD7734EBZ is available at Aetrix Electronics and suitable for industrial instrumentation, PLC/DCS prototyping, and high-precision multiplexing applications requiring stable component supply, traceable sourcing, and long-term lifecycle support.

Supply support for EVAL-AD7734EBZ 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-AD7734EBZ belongs to Analog Devices' precision data acquisition evaluation platform family, engineered specifically to de-risk adoption of sigma-delta ADCs in demanding industrial measurement systems.

FAQ

What is the primary function of the EVAL-AD7734EBZ?

The EVAL-AD7734EBZ is an evaluation board designed exclusively for the AD7734 24-bit sigma-delta ADC. It provides a ready-to-use hardware platform to evaluate the IC's performance-including 4-channel single-ended analog input support, ±10 V range, on-chip calibration, and 3-wire serial interface-under real-world conditions. Engineers use EVAL-AD7734EBZ to validate signal chain accuracy, timing behavior, and system integration before committing to custom PCB design.

Does the EVAL-AD7734EBZ support the full AD7734 feature set?

Yes, the EVAL-AD7734EBZ supports all key AD7734 features: four single-ended analog inputs (AIN0–AIN3), differential reference input with No-Reference detection, per-channel system calibration, chopping enable/disable modes, 3-wire SPI-compatible interface, and independent AVDD/DVDD supplies. All 28 pins-including SYNC/P1, MCLKIN/MCLKOUT, and RDY-are brought out for probing and control, enabling full register-level access and timing validation per AD7734 Rev. B specifications.

Can the EVAL-AD7734EBZ operate across the full AD7734 temperature range?

Yes, the EVAL-AD7734EBZ is designed and tested to operate across the full –40°C to +105°C extended industrial temperature range specified for the AD7734. Its layout, component selection, and power delivery architecture maintain signal integrity and thermal stability within this range, ensuring reliable evaluation of AD7734 performance under extreme environmental conditions.

What clock sources are supported by the EVAL-AD7734EBZ for the AD7734?

The EVAL-AD7734EBZ supports both crystal/resonator and external CMOS clock sources for the AD7734's MCLKIN input. It includes a factory-installed 6.144 MHz crystal between MCLKIN and MCLKOUT, but also allows direct injection of an external clock into MCLKIN while disabling MCLKOUT - matching the dual-clock configuration options defined in the AD7734 datasheet Rev. B.

Is software or firmware required to use the EVAL-AD7734EBZ?

Yes, the EVAL-AD7734EBZ requires host-side software to communicate with the AD7734 via its 3-wire serial interface. Analog Devices provides evaluation software (e.g., ACE - Analysis, Control, Evaluation) and driver libraries compatible with Windows-based PCs and standard USB-to-SPI adapters. This software enables register configuration, data capture, noise analysis, and calibration sequence execution - essential for fully exercising the AD7734 capabilities on the EVAL-AD7734EBZ.