Analog Devices Inc. AD9284BCPZ-250

Overview

AD9284BCPZ-250 from Analog Devices is a dual-channel, 8-bit, 250 MSPS analog-to-digital converter optimized for simultaneous sampling in communications and instrumentation systems. It operates from a single 1.8 V supply, delivers 49.3 dBFS SNR at 200 MHz input, 65 dBc SFDR, and features LVDS digital outputs with 1.2 V_p-p differential analog input range.

For engineers reviewing the AD9284BCPZ-250 datasheet, AD9284BCPZ-250 pinout, AD9284BCPZ-250 application, or AD9284BCPZ-250 equivalent, key selection considerations include dual-channel synchronization, low-power 314 mW operation at full rate, on-chip reference and track-and-hold, LVDS output compatibility, and industrial temperature range (−40°C to +85°C) support.

Technical Context

The AD9284BCPZ-250 implements a pipelined ADC architecture with differential input buffers, integrated sample-and-hold amplifiers, and digital error correction logic. Each channel shares a common encode clock and supports simultaneous sampling with 10.5-cycle pipeline latency and 1.0 ns aperture delay.

It uses an internal 1.0 V reference generating a fixed 1.2 V_p-p analog input span, with on-chip common-mode bias (VCM = 1.4 V) and external RBIAS resistor (10 kΩ to AGND) setting core current. Digital outputs are LVDS-compliant with DCO± clock forwarding and tristate enable via OE pin.

Key Specifications

Pinout & Package

The AD9284BCPZ-250 is housed in a Pb-free, 48-lead LFCSP (CP-48-14) package with exposed thermal pad requiring soldering to PCB analog ground for functionality, thermal dissipation, and noise control.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, 8-bit, high-speed ADC applications.

Compared with AD9284BCPZ-250, AD9283BCPZ-250 lacks true dual-channel synchronization and doubles board area for equivalent function, while ADS52J90IRGCT trades LVDS simplicity for JESD204B scalability and 2-bit resolution gain at higher power and layout cost.

Availability

AD9284BCPZ-250 is available at Aetrix Electronics and suitable for communications infrastructure, handheld test equipment, and video-over-fiber receivers requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for AD9284BCPZ-250 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 AD9284BCPZ-250 belongs to Analog Devices' high-speed ADC product line, designed specifically for cost-sensitive, low-power, dual-channel digitization in communications, instrumentation, and video systems.

FAQ

What is the operating temperature range for the AD9284BCPZ-250?

The AD9284BCPZ-250 is specified for industrial operation from −40°C to +85°C. This range is validated across all AC and DC specifications in the Rev. B datasheet, including SNR, SFDR, and DNL. The 48-lead LFCSP package's θ_JA of 30.4°C/W ensures thermal stability under continuous 250 MSPS operation within this envelope. No derating is required for full performance across the range.

Does the AD9284BCPZ-250 require external reference components?

No, the AD9284BCPZ-250 integrates a 1.0 V internal reference that establishes its 1.2 V_p-p analog input range. External components are not needed for basic operation. However, the VREF pin supports optional external reference injection for improved accuracy or drift performance, and the RBIAS pin requires a 10 kΩ ±1% resistor to AGND to set core bias current-this is the only mandatory external component.

How does the AD9284BCPZ-250 handle clock jitter, and what is its aperture uncertainty?

Aperture uncertainty (jitter) for the AD9284BCPZ-250 is specified at 0.1 ps rms, measured under full-rate conditions with a low-jitter clock source. This ultra-low jitter enables high-fidelity digitization of wideband signals up to 200 MHz. System-level jitter performance depends critically on clock source quality and differential routing of CLK+/CLK−; transformer or balun coupling is recommended to suppress common-mode noise.

Can the AD9284BCPZ-250 output data in multiple formats, and how is it configured?

Yes, the AD9284BCPZ-250 supports offset binary (default), Gray code, and twos complement output formats. Configuration is performed via SPI register writes (Register 0x0C, bit D2–D1) or hardware pin strapping using SDIO/PWDN and CSB during power-up. Format selection affects FPGA data alignment logic but does not alter conversion accuracy or timing parameters.

What is the purpose of the DCO± pins on the AD9284BCPZ-250?

The DCO± (Data Clock Output) pins on the AD9284BCPZ-250 provide an LVDS-formatted, source-synchronous clock aligned to the output data edges. This eliminates timing margin uncertainty in FPGA or ASIC capture logic, especially at 250 MSPS. DCO± has a propagation delay of 3.7 ns and skew to data of −280 ps to +100 ps, enabling robust setup/hold timing without external delay tuning.