Analog Devices Inc. EVAL-AD7652EDZ

Overview

EVAL-AD7652EDZ from Analog Devices is an evaluation board designed specifically for the AD7652 - a 16-bit, 500 kSPS single-ended unipolar PulSAR® successive approximation register (SAR) analog-to-digital converter. It provides buffered parallel (16-bit) and serial interfaces, on-board precision reference (AD780/ADR431/ADR435), clock oscillator, analog signal conditioning circuitry, and digital prototyping area. The board supports stand-alone operation or integration with the EVAL-CED1Z capture board for DSP and data acquisition system development.

For engineers reviewing the EVAL-AD7652EDZ datasheet, EVAL-AD7652EDZ pinout, EVAL-AD7652EDZ application, or EVAL-AD7652EDZ equivalent, this page delivers verified technical context, interface configuration options, power supply routing guidance, jumper and DIP switch mappings, and real-world test setup considerations for ADC characterization including histogram (DC noise) and FFT (AC performance) analysis.

Technical Context

The EVAL-AD7652EDZ implements a flexible gate array (U10) that generates CNVST, controls BUSY timing, buffers ADC output data (BD[0:15]), and manages parallel/serial read modes. It supports both internal CNVST generation (via 40 MHz MCLK from U12 or EVAL-CED1Z) and external CNVST injection via SMB connector J3.

Analog input conditioning uses dual op-amps (U6, U7) configured as unity-gain buffers by default, with selectable ±12V/±5V supplies and configurable input ranges (0–2.5V factory setting for AD7652). Power domains are split into isolated analog (AVDD, REF, front-end) and digital (DVDD, OVDD, gate array) planes connected only under the ADC to preserve SNR.

Key Specifications

Availability

EVAL-AD7652EDZ is available at Aetrix Electronics and suitable for high-resolution data acquisition systems, industrial sensor signal chains, and embedded test instrumentation requiring stable component supply, full-characterization support, and rapid ADC evaluation.

Supply support for EVAL-AD7652EDZ 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-AD7652EDZ belongs to Analog Devices' PulSAR® evaluation platform family, engineered to accelerate validation of precision SAR ADCs in demanding measurement and control applications where resolution, speed, and noise floor are critical.

FAQ

What ADCs does the EVAL-AD7652EDZ support?

EVAL-AD7652EDZ is explicitly validated for the AD7652 - a 16-bit, 500 kSPS single-ended unipolar SAR ADC with 0–2.5V input range. It is part of the broader EVAL-AD76XXEDZ platform supporting AD761X through AD767X and AD795X families, but each board variant is calibrated and configured for its designated device. The AD7652-specific settings include jumper JP4 (REF), JP9 (DVDD), and S16/S35 switch defaults optimized for its timing and power requirements.

How is the EVAL-AD7652EDZ powered in stand-alone mode?

In stand-alone mode, EVAL-AD7652EDZ requires two independent linear power supplies applied via solder jumpers SJ1 (analog domain: AVDD, reference, op-amps) and SJ2 (digital domain: DVDD, OVDD, gate array U10). Default configuration uses ±12V for analog and +5V for digital, with R27 (20Ω) isolating AVDD from DVDD if sharing a source. JP9 must be set to VDIG or 2.5V depending on ADC voltage tolerance, and JP6 selects OVDD at 3.3V per AD7652 specifications.

Can the EVAL-AD7652EDZ be used without the EVAL-CED1Z?

Yes, EVAL-AD7652EDZ operates fully in stand-alone mode. When CONTROL input to gate array U10 is pulled LOW (default), it autonomously generates CNVST, manages BUSY signaling, and buffers BD[0:15] continuously on P2. S16/S35 DIP switches configure interface mode (parallel/serial), data format, and read timing. No software or USB connection is required for basic DC/AC testing using on-board VREF/2 or external SMB sources.

What analog input configurations are supported for the AD7652 on this board?

EVAL-AD7652EDZ is factory configured for the AD7652's native 0–2.5V unipolar input range using unity-gain op-amp buffers (U6/U7) and ±12V supplies. Input impedance is 1 kΩ (R6/R29 to GND). To change range (e.g., 0–5V), reconfigure solder pads S1–S7 per schematics and datasheet guidance. JP1/JP2 select buffer use, JP3/JP8 set op-amp supply rails, and JP4 determines whether on-board reference or AVDD serves as ADC reference.

Which software tools are compatible with the EVAL-AD7652EDZ?

EVAL-AD7652EDZ is supported by Analog Devices' PulSAR Evaluation Software (v.x.x), which runs on Windows XP and requires the EVAL-CED1Z capture board for USB-based control and data transfer. The software enables histogram (transition noise), FFT (SNR, SINAD, THD, SFDR), and time-domain analysis. Stand-alone operation does not require software, but full AC/DC characterization and automated reporting depend on this official toolset installed via CD-ROM or Analog Devices website download.