Analog Devices Inc. EVAL-AD7732EBZ

Overview

EVAL-AD7732EBZ from Analog Devices is an evaluation board for the AD7732 24-bit Σ-Δ ADC, designed to accelerate development of high-precision industrial measurement systems. It supports dual fully differential 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 - enabling rapid prototyping of PLC/DCS and process control front ends.

For engineers reviewing the EVAL-AD7732EBZ datasheet, EVAL-AD7732EBZ pinout, EVAL-AD7732EBZ application, or EVAL-AD7732EBZ equivalent, this page delivers verified hardware configuration details, real-world timing behavior, supported input ranges, calibration workflow guidance, and direct integration notes with AD7732-based signal chains - all aligned with Rev. A datasheet specifications and Analog Devices' official evaluation platform documentation.

Technical Context

The EVAL-AD7732EBZ implements a complete test environment for the AD7732 IC, including precision voltage reference (REFIN±), configurable bias networks (BIAS0/1, RA–RD), crystal oscillator circuitry (MCLKIN/MCLKOUT), and Schmitt-triggered digital I/O (SYNC/P0/P1). It routes all 28 TSSOP pins to accessible test points and headers, supporting both single-supply (5 V AVDD, 3 V or 5 V DVDD) and overvoltage-tolerant operation (±16.5 V channel isolation).

Hardware design enables full validation of AD7732 features: fast channel switching (500 μs total conversion time at 2 kHz), chopping-enabled low-drift mode, per-channel system calibration registers, and "No-Reference" detect capability via REFIN(–) monitoring. The board's layout preserves signal integrity for 24-bit noise performance, with dedicated AGND/DGND separation and buffered analog input paths.

Key Specifications

Availability

EVAL-AD7732EBZ is available at Aetrix Electronics and suitable for industrial instrumentation, PLC/DCS development, and high-accuracy process control applications requiring stable component supply, traceable evaluation hardware, and long-term design-in support.

Supply support for EVAL-AD7732EBZ 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 R&D and manufacturing operations worldwide.

The EVAL-AD7732EBZ belongs to Analog Devices' precision data acquisition evaluation platform family, engineered specifically to de-risk adoption of high-resolution Σ-Δ ADCs in demanding industrial and instrumentation applications.

FAQ

What is the primary function of the EVAL-AD7732EBZ?

The EVAL-AD7732EBZ is an evaluation board designed exclusively for the AD7732 24-bit Σ-Δ analog-to-digital converter. It provides a fully assembled, tested hardware platform with accessible test points, reference circuitry, clock generation, and digital interface headers - enabling engineers to validate AD7732 performance, configure registers, run calibration routines, and integrate the device into industrial measurement systems without custom PCB development. The EVAL-AD7732EBZ directly supports all AD7732 features documented in Rev. A datasheet.

Does the EVAL-AD7732EBZ support both ±10 V and ±5 V input ranges?

Yes, the EVAL-AD7732EBZ supports all input ranges specified for the AD7732: ±10 V, ±5 V, 0–10 V, and 0–5 V. These ranges are implemented through configurable external resistor networks (RA–RD) and bias voltage sources (BIAS0/1) on the board, as defined in AD7732 datasheet Section "Analog Inputs" and Figure 12. Each range has been validated for linearity, noise, and channel isolation per Table 1 specifications.

Can the EVAL-AD7732EBZ be used with a 3 V digital supply?

Yes, the EVAL-AD7732EBZ supports 3 V digital supply (DVDD) operation, consistent with AD7732's dual-supply flexibility. The board includes jumper-selectable DVDD configuration and accommodates DVDD = 2.7–3.6 V or 4.75–5.25 V, matching the Absolute Maximum Ratings and Timing Specifications in the AD7732 Rev. A datasheet. All digital I/O (SCLK, DIN, DOUT, CS, etc.) meet 3 V logic thresholds with Schmitt triggering.

How does the EVAL-AD7732EBZ implement channel calibration?

The EVAL-AD7732EBZ enables full use of AD7732's on-chip per-channel system calibration by providing direct access to calibration registers (Channel Zero-Scale/Full-Scale Calibration Registers), status bits (OVR, CLAMP), and control logic via its serial interface. Users can execute zero-scale and full-scale calibration routines using the board's SPI interface and Analog Devices' evaluation software - validating calibration limits of ±1.05 × FS and input span of 0.8–2.1 × FS as specified in AD7732 datasheet Table 1.

Is the EVAL-AD7732EBZ compatible with standard microcontrollers?

Yes, the EVAL-AD7732EBZ features a 3-wire SPI-compatible serial interface (SCLK, DIN, DOUT) with active-low CS, RESET, and RDY signals - all Schmitt-triggered and compliant with microcontroller GPIO levels at 3 V or 5 V. It requires no protocol translation or level shifting, and supports standard SPI frame formats, dump mode, and continuous conversion modes as defined in AD7732 datasheet Sections "Digital Interface Description" and "Register Access".