Analog Devices Inc. EVAL-AD7675CBZ

Overview

EVAL-AD7675CBZ from Analog Devices is an evaluation board designed for the AD7675 - a 16-bit, 100 kSPS differential unipolar PulSAR® successive approximation register (SAR) analog-to-digital converter. It provides buffered parallel (16-bit) and serial interfaces, on-board precision reference (ADR435 or AD780), clock oscillator (40 MHz), signal conditioning circuitry, and analog/digital prototyping area. It supports stand-alone operation or integration with EVAL-CED1Z or EVAL-CONTRL BRDxZ capture boards for data acquisition system development.

For engineers reviewing the EVAL-AD7675CBZ datasheet, EVAL-AD7675CBZ pinout, EVAL-AD7675CBZ application, or EVAL-AD7675CBZ equivalent, this page delivers verified technical context, interface configuration options, power supply routing guidance, supported ADC family compatibility, and software-controlled test capabilities including histogram, FFT, and decimated AC analysis.

Technical Context

The EVAL-AD7675CBZ implements a flexible gate array (U10) that generates conversion control signals (CNVST), buffers ADC output data, and manages interface timing for both parallel and serial read modes. It supports configurable analog input scaling via op-amps U6/U7 and selectable ±12 V, ±5 V, or +5 V supplies through jumpers JP3, JP7, JP8, and JP9.

It enables hardware- and software-configurable operation: S16/S35 DIP switches select binary/2's complement output coding, warp/normal/impulse conversion modes, byte-swapping, and serial clock source (internal vs. external slave mode). The board uses a 4-layer PCB layout with separated analog/digital ground planes connected under the ADC to preserve 16-bit resolution performance.

Key Specifications

Availability

EVAL-AD7675CBZ is available at Aetrix Electronics and suitable for high-resolution data acquisition systems, industrial sensor interface validation, and SAR ADC firmware development requiring stable component supply, traceable sourcing, and long-term evaluation platform continuity.

Supply support for EVAL-AD7675CBZ 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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control applications.

The EVAL-AD7675CBZ belongs to Analog Devices' PulSAR® evaluation platform family, engineered to accelerate development of high-speed, high-accuracy data acquisition systems using SAR ADCs across industrial, instrumentation, and medical applications.

FAQ

What ADCs does the EVAL-AD7675CBZ specifically support?

The EVAL-AD7675CBZ is explicitly validated for the AD7675 - a 16-bit, 100 kSPS, differential unipolar SAR ADC with ±2.5 V input range. It also supports the broader AD76XX-48 family (e.g., AD761x, AD762x, AD763x, AD764x, AD765x, AD766x, AD767x, AD795x), as confirmed in the General Description and Table 1 of the preliminary technical data. Each device requires appropriate jumper and switch configuration per its datasheet.

Does the EVAL-AD7675CBZ require a companion capture board to operate?

No, the EVAL-AD7675CBZ supports full stand-alone operation without EVAL-CED1Z or EVAL-CONTRL BRDxZ. In stand-alone mode, the onboard gate array (U10) generates CNVST, manages data buffering, and drives BD[0:15] continuously after conversion. Configuration is handled via S16/S35 DIP switches and jumpers like JP22 (CNVST source = INT), enabling hardware-controlled testing without PC or software.

How is analog input configured for the AD7675 on the EVAL-AD7675CBZ?

The AD7675 on EVAL-AD7675CBZ uses differential unipolar input with a factory-set ±2.5 V range. Analog signal conditioning is implemented with op-amps U6/U7 configured as unity-gain buffers. Input range selection is achieved via jumper JP1/JP2 (BUFF/NO BUFF), and supply rails are set using JP3 (VDRV−), JP7 (VREF+), JP8 (VDRV+), and JP19 (AVDD), all documented in Table 2 of the technical data.

What software tools are compatible with the EVAL-AD7675CBZ?

The EVAL-AD7675CBZ is supported by two official Analog Devices software packages: "AD76xx Evaluation Software CED" (for use with EVAL-CED1Z) and "AD76xx Evaluation Software ECB" (for EVAL-CONTROL-BRDXZ). Both provide histogram, FFT, decimation, and time-domain analysis. The CED version supports EVAL-AD76yyECBZ boards but also works with EVAL-AD76XXCBZ when paired with ECB hardware and proper driver installation.

Can the EVAL-AD7675CBZ be used for AC performance testing of the AD7675?

Yes - the EVAL-AD7675CBZ supports full AC characterization of the AD7675 using low-distortion sinusoidal inputs applied via SMB connectors J1 (IN+) and J2 (IN−). The board enables FFT-based computation of SNR, SINAD, THD, and SFDR. For optimal results, input signals must exceed 100 dB spectral purity, and on-board filtering (C26/C41) is recommended to match ADC noise floor requirements.