Analog Devices Inc. AD9265-125EBZ

Overview

AD9265-125EBZ from Analog Devices is a high-speed analog-to-digital converter (ADC) evaluation board designed to fully characterize the AD9265BCPZ-125, a 16-bit, 125 MSPS pipeline ADC in a 64-lead LFCSP package. It supports differential analog input up to 250 MHz, SPI-based configuration, and offers flexible clocking via on-board oscillator or AD9517-4 PLL, with dual power supply options (LDO or ADP2108 switching regulators).

For engineers reviewing the AD9265-125EBZ datasheet, AD9265-125EBZ pinout, AD9265-125EBZ application, or AD9265-125EBZ equivalent, this board enables rapid ac performance validation-including SNR (76.5 dB), SFDR (88.0 dBc), and FFT analysis-using VisualAnalog and SPIController software with HSC-ADC-EVALCZ FPGA capture hardware.

Technical Context

The AD9265-125EBZ implements a complete signal chain for evaluating the AD9265BCPZ-125 ADC under real-world conditions: it integrates balun-coupled analog input path (50 Ω, double-balun), configurable reference (1.0 V internal or programmable), and low-jitter clock routing supporting LVPECL, CMOS, or transformer-coupled inputs. Default clock source is a 125 MHz Valpey Fisher oscillator installed at Y1.

Power architecture includes selectable LDO regulation (for low-noise bias) or ADP2108 step-down DC/DC converters for AVDD/DRVDD rails, enabling efficiency vs. noise trade-off analysis. Output data is buffered via 74VCX162827MTDX and routed to P2 for connection to the HSC-ADC-EVALCZ FPGA platform using CMOS-level signals.

Key Specifications

Availability

AD9265-125EBZ is available at Aetrix Electronics and suitable for high-speed data acquisition, radar signal processing, and communications test equipment requiring stable component supply and validated reference design support.

Supply support for AD9265-125EBZ 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 Wilmington, MA.

The AD9265-125EBZ belongs to Analog Devices' high-speed converter evaluation platform family, engineered to accelerate development of precision digitization systems in defense, instrumentation, and broadband infrastructure applications.

FAQ

What is the primary function of the AD9265-125EBZ?

The AD9265-125EBZ is an evaluation board-not an IC or discrete component-designed exclusively to assess the performance of the AD9265BCPZ-125 analog-to-digital converter. It provides all necessary support circuitry including clock generation, analog input conditioning, power regulation, SPI control interface, and FPGA-compatible data output buffering. The AD9265-125EBZ itself contains no active conversion functionality; its role is system-level validation of the AD9265BCPZ-125 under controlled lab conditions.

Which ADC does the AD9265-125EBZ evaluate?

The AD9265-125EBZ evaluates the AD9265BCPZ-125: a 16-bit, 125 MSPS pipeline analog-to-digital converter in a 64-lead LFCSP package. While the board's documentation references both AD9265 and AD9255 families, the "-125" suffix in AD9265-125EBZ explicitly denotes compatibility with the 125 MSPS variant of the AD9265, confirmed by the on-board 125 MHz oscillator (Y1) and default jumper settings described in UG-074 Rev. 0.

Does the AD9265-125EBZ include the AD9265BCPZ-125 IC?

Yes-the AD9265-125EBZ evaluation board ships populated with the AD9265BCPZ-125 IC as the device under test (DUT), referenced in the Bill of Materials (Item No. 17) as "Analog-to-digital converter, Analog Devices/AD9265BCPZ-125". The board is not a bare PCB; it is a fully assembled, tested platform ready for immediate connection to the HSC-ADC-EVALCZ capture kit and PC-based analysis software.

What software tools are required to operate the AD9265-125EBZ?

Two primary software tools are required: VisualAnalog for FFT-based performance analysis (SNR, SFDR, harmonic distortion) and SPIController for register-level configuration of the AD9265BCPZ-125 via its serial peripheral interface. Both are provided free by Analog Devices and integrate directly with the HSC-ADC-EVALCZ FPGA platform. The AD9265-125EBZ user guide (UG-074) details setup sequences, template selection, and SPI register mapping specific to the AD9265BCPZ-125.

Can the AD9265-125EBZ be powered by bench supplies instead of the included wall adapter?

Yes-the AD9265-125EBZ supports external bench power via jumpers P27, P28, P31, P30, P32, and P29 to disconnect on-board LDO outputs, allowing independent biasing of AVDD (1.8 V, 1 A), SVDD (1.8 V, 1 A), DRVDD (1.8 V, 1 A), 3V_DIG (1.8 V, 1 A), and optional amplifier rails (5V_AVDD/3V_AVDD, each 1 A). This enables precise rail-by-rail characterization and noise isolation testing beyond the capabilities of the default 6 V switching supply.