Analog Devices Inc. AD9239BCPZ-250

Overview

AD9239BCPZ-250 from Analog Devices is a quad-channel, 12-bit, 250 MSPS analog-to-digital converter with serial CML outputs, on-chip temperature sensor, and 780 MHz full-power analog bandwidth. It delivers SNR = 64.1 dBFS and SFDR = 77 dBc at 85 MHz input frequency, enabling high-fidelity digitization in broadband radio receivers and radar subsystems.

For engineers reviewing the AD9239BCPZ-250 datasheet, AD9239BCPZ-250 pinout, AD9239BCPZ-250 application, or AD9239BCPZ-250 equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative parts with functional distinctions, and supply support for industrial and aerospace signal acquisition systems.

Technical Context

The AD9239BCPZ-250 implements a pipelined switched-capacitor ADC architecture with digital correction logic, sampling on the rising clock edge and achieving 40-clock-cycle pipeline latency. Each of its four independent channels features differential input buffers, a clock duty cycle stabilizer (DCS), and embedded error correction coding (ECC) per channel.

It uses current-mode logic (CML) serial outputs delivering up to 4.0 Gbps per channel, with deterministic jitter ≤10 ps and random jitter ≤6 ps rms. The on-chip PLL enables single-clock input distribution and multiplication, while programmable SPI registers control header format, pin functions (PGMx), power-down modes, and input voltage range (1.0–1.5 V p-p).

Key Specifications

Pinout & Package

The AD9239BCPZ-250 is housed in a Pb-free/RoHS-compliant 72-lead LFCSP package (CP-72-3) with an exposed thermal paddle requiring solder connection to PCB ground for θ_JA = 16.2°C/W operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9239BCPZ-250, AD9233BCPZ-250 reduces integration but increases layout complexity for multi-channel systems, while ADS54J60IRGCT delivers higher resolution and speed at significantly higher power and interface overhead - making AD9239BCPZ-250 optimal for cost-sensitive, thermally constrained 250 MSPS quad-sampling applications.

Availability

AD9239BCPZ-250 is available at Aetrix Electronics and suitable for communication receivers, radar subsystems, and test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AD9239BCPZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and aerospace markets since 1965.

The AD9239 product line delivers quad-channel, high-speed ADCs optimized for broadband signal acquisition in software-defined radios, cable infrastructure, and defense electronics - emphasizing integration, low crosstalk, and robust serial interface reliability.

FAQ

What is the maximum analog input frequency supported by the AD9239BCPZ-250?

The AD9239BCPZ-250 has a 780 MHz full-power analog bandwidth, meaning it maintains specified SNR and SFDR performance for input signals up to 780 MHz. This enables direct sampling of IF signals in the second Nyquist zone (e.g., 170–240 MHz) without degradation. Performance metrics such as SNR = 64.1 dBFS and SFDR = 77 dBc are guaranteed at 85 MHz, with measured SFDR remaining ≥74.5 dBc even at 240.3 MHz per the Rev. F datasheet Table 2.

Does the AD9239BCPZ-250 support differential or single-ended clock inputs?

The AD9239BCPZ-250 accepts differential clock inputs (CLK+, CLK−) compliant with LVPECL, LVDS, or CMOS logic levels, with internal 1.2 V common-mode bias. Single-ended CMOS drive is also supported: CLK+ driven directly, CLK− bypassed to ground via 0.1 µF capacitor and 39 kΩ resistor. The on-chip clock duty cycle stabilizer (DCS) ensures 50% internal duty cycle regardless of input duty cycle variation, preserving dynamic performance across all supported clock configurations.

How is the serial output formatted on the AD9239BCPZ-250?

The AD9239BCPZ-250 outputs serialized CML data in 64-bit packets per channel, structured as: 8-bit header, four 12-bit ADC samples (A–D), and 8-bit ECC. Each packet is transmitted at 4.0 Gbps (250 MSPS × 16-bit encoding), with deterministic jitter ≤10 ps and channel-to-channel packet skew of +1 clock cycle. The serializer embeds clock information, eliminating need for separate clock routing in high-speed PCB layouts.

Can the AD9239BCPZ-250 operate with a reduced input voltage range?

Yes - the AD9239BCPZ-250 supports programmable differential input voltage range from 1.0 V p-p to 1.5 V p-p via SPI Register 18. The default is 1.25 V p-p, which delivers optimal SNR. Reducing to 1.0 V p-p lowers full-scale headroom but may improve noise floor in low-amplitude signal chains; increasing to 1.5 V p-p enhances clipping margin for high-PAPR waveforms like OFDM, with verified linearity (DNL ±0.3 LSB, INL ±0.7 LSB) maintained across the full range.

What thermal management is required for the AD9239BCPZ-250?

The AD9239BCPZ-250 dissipates 1.634 W at 250 MSPS and requires soldering of its exposed thermal paddle to a PCB ground plane to achieve θ_JA = 16.2°C/W. Without paddle connection, junction temperature rise exceeds safe limits under continuous operation. Thermal resistance drops to θ_JC = 0.6°C/W when properly mounted, enabling reliable operation within the −40°C to +85°C industrial temperature range. Layout guidelines mandate ≥4 thermal vias under the paddle connected to inner ground layers.