Analog Devices Inc. EVAL-AD7650CBZ

Overview

EVAL-AD7650CBZ from Analog Devices is an evaluation board designed for the AD7650 16-bit, 571 kSPS PulSAR® successive approximation register (SAR) analog-to-digital converter. It supports single-ended unipolar 0 V to 2.5 V analog input, features on-board reference (AD780/ADR431/ADR435), buffered parallel (16-bit) and serial interfaces, and integrates signal conditioning op-amps and a 40 MHz local oscillator for stand-alone or capture-board-based testing.

For engineers reviewing the EVAL-AD7650CBZ datasheet, EVAL-AD7650CBZ pinout, EVAL-AD7650CBZ application, or EVAL-AD7650CBZ equivalent, this page provides verified technical context, interface configuration options, supported ADC family compatibility, and hardware/software setup guidance for high-resolution data acquisition validation.

Technical Context

The EVAL-AD7650CBZ implements a flexible gate array (U10) that generates CNVST, manages BUSY signaling, and buffers conversion data for both parallel and serial readout modes. It supports stand-alone operation without external capture boards by defaulting CONTROL to LOW, enabling continuous parallel output on BD[0:15] after BUSY goes HIGH.

It integrates configurable analog front-end circuitry (U6/U7 op-amps), selectable ±12 V / +5 V supplies via SJ1/SJ2, jumper-controlled reference routing (JP4), and dual-mode clocking - either internal 40 MHz oscillator (U12) or external MCLK from EVAL-CED1Z/EVAL-CONTRL BRDxZ - with SCLK derived directly from MCLK in slave serial mode.

Key Specifications

Availability

EVAL-AD7650CBZ is available at Aetrix Electronics and suitable for high-resolution data acquisition system validation, SAR ADC performance benchmarking, and industrial sensor interface prototyping requiring stable component supply and full evaluation infrastructure.

Supply support for EVAL-AD7650CBZ 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 (DSP) technologies, headquartered in Norwood, MA.

The EVAL-AD7650CBZ belongs to Analog Devices' PulSAR® evaluation platform family, engineered specifically to accelerate development and characterization of precision SAR ADCs used in test equipment, medical imaging, and industrial automation.

FAQ

What ADC devices does the EVAL-AD7650CBZ support?

The EVAL-AD7650CBZ is explicitly validated for the AD7650 16-bit, 571 kSPS SAR ADC with 0 V to 2.5 V single-ended unipolar input. It also supports the broader AD761X–AD767X and AD795X families as noted in its design scope, but all configuration settings (e.g., jumpers JP1–JP22, DIP switches S16/S35) must be adjusted per the target ADC's datasheet requirements. The EVAL-AD7650CBZ documentation confirms direct compatibility and factory calibration for AD7650 operation.

Does the EVAL-AD7650CBZ require an external capture board to operate?

No, the EVAL-AD7650CBZ operates in stand-alone mode without EVAL-CED1Z or EVAL-CONTRL BRDxZ. When the CONTROL input to the gate array (U10) is held LOW (default), it autonomously generates CNVST, manages BUSY timing, and outputs buffered parallel data on BD[0:15]. Stand-alone use requires only linear ±12 V and +5 V supplies applied via SJ1/SJ2, with no PC or software dependency for basic conversion verification.

How is analog input configured for the AD7650 on the EVAL-AD7650CBZ?

The EVAL-AD7650CBZ configures the AD7650 for 0 V to 2.5 V single-ended unipolar input using factory-set unity-gain buffers (U6/U7). JP1 and JP2 are set to BUFF, JP3 selects –12 V, JP8 selects +12 V, and JP4 selects REF to route the on-board reference to the ADC. This matches the AD7650's specified input range and eliminates need for external signal conditioning during baseline evaluation of EVAL-AD7650CBZ.

What software tools are compatible with the EVAL-AD7650CBZ?

The EVAL-AD7650CBZ uses Analog Devices' AD76xx Evaluation Software in both CED (USB-based) and ECB (parallel-port-based) versions. These tools enable histogram analysis (transition noise), FFT-based AC performance metrics (SNR, SINAD, THD, SFDR), decimated oversampling up to 32-bit resolution, and serial programmable port (SPP) configuration for compatible iCMOS parts. Software installation requires Windows 2000/XP, administrator privileges, and proper driver setup for the selected capture board.

Can the EVAL-AD7650CBZ be used for bipolar input evaluation?

No - the EVAL-AD7650CBZ is not configured for bipolar input evaluation. The AD7650 itself is a unipolar-only device (0 V to 2.5 V SE), and the board's analog input circuitry (U6/U7, R6/R7, R29/R60) is factory-set for mid-scale biasing appropriate to unipolar operation. Bipolar-capable variants like AD7663 or AD7665 use different jumper and switch configurations; attempting bipolar setup on EVAL-AD7650CBZ would not align with AD7650's electrical specifications or functional intent.