Analog Devices Inc. DC854D-H

Overview

DC854D-H from Analog Devices (formerly Linear Technology) is a high-performance 16-bit, 80Msps analog-to-digital converter optimized for wideband signal digitization in communications infrastructure. It features 2.75V_P-P differential input range, 85fs_RMS aperture jitter, 81.5dBFS noise floor, and 100dB spurious-free dynamic range (SFDR), enabling undersampling of RF signals up to 400MHz in cellular base station receivers and spectrum analyzers.

For engineers reviewing the DC854D-H datasheet, DC854D-H pinout, DC854D-H application, or DC854D-H equivalent, key selection considerations include its LVDS/CMOS dual-output flexibility, internal clock duty cycle stabilizer, optional dither and data randomizer, and compatibility with demanding wideband IF sampling architectures requiring low noise and high SFDR at Nyquist and beyond.

Technical Context

The DC854D-H implements a 16-bit pipelined ADC core with integrated sample-and-hold amplifier and internal reference generator, supporting full-power bandwidth up to 400MHz. Its architecture enables direct RF sampling of IF signals in the 70MHz–140MHz band while maintaining >95dB SFDR even at –25dBFS input levels when dither is enabled.

It supports three digital output configurations: single-bus CMOS (full-rate), demultiplexed CMOS (half-rate dual buses), and standard or low-power LVDS. Clock interface accepts differential (LVDS/PECL) or single-ended (TTL/CMOS) inputs, with an on-chip duty cycle stabilizer ensuring timing integrity across 40%–60% input clock duty cycles.

Key Specifications

Pinout & Package

DC854D-H is housed in a 64-lead (9mm × 9mm) plastic QFN package with exposed thermal pad (Pin 65 = GND). The package supports high-density RF layout with dedicated analog/digital ground separation and symmetric differential I/O routing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DC854D-H, AD9268BCPZ-80 trades parallel interface flexibility for serial density and FPGA integration, while LTC2217IUP#PBF extends sampling rate and SFDR at the cost of increased power and thermal load-both require revalidation but share mechanical and signal integrity compatibility.

Availability

DC854D-H is available at Aetrix Electronics and suitable for cellular infrastructure, test equipment, spectrum monitoring, and radar subsystems requiring stable component supply, long-term obsolescence management, and traceable sourcing.

Supply support for DC854D-H 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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving aerospace, communications, industrial, and medical markets.

The DC854D-H belongs to ADI's high-speed precision ADC product line, designed specifically for wideband communications and instrumentation applications demanding ultra-low jitter, high SFDR, and flexible digital interfacing in harsh RF environments.

FAQ

What is the maximum analog input frequency supported by the DC854D-H?

The DC854D-H supports a full-power bandwidth of 400MHz, meaning it can accurately digitize analog input signals up to 400MHz while maintaining specified SNR and SFDR performance. This makes it suitable for undersampling IF signals in communications receivers and spectrum analysis applications without requiring additional anti-alias filtering for frequencies below this limit.

Does the DC854D-H require an external reference voltage?

No-the DC854D-H includes an internal 2.5V bandgap reference and generates a fixed 2.75V_P-P input range. The SENSE pin can be tied to VDD to select the internal reference; alternatively, a 2.5V or 1.25V external reference may be applied to SENSE to maintain the same full-scale range, providing flexibility for system-level reference sharing or improved temperature stability.

How does the internal dither function improve performance in the DC854D-H?

When enabled via the DITH pin, the DC854D-H injects controlled noise into the ADC transfer function, breaking harmonic correlation and reducing deterministic spurs. This improves SFDR by up to 20dB at low input levels (e.g., –25dBFS), making it especially valuable in ATE and spectrum analysis where low-level signal fidelity is critical-verified in datasheet Figure G14 and G53.

Can the DC854D-H operate with a single-ended clock input?

Yes-the ENC+ and ENC– inputs accept both differential and single-ended clock signals. For single-ended operation, drive ENC+ with a TTL/CMOS/PECL waveform and tie ENC– to the appropriate common-mode voltage (typically 1.6V); the internal 6.2kΩ bias resistors simplify interface design without requiring external termination networks.

What is the data latency of the DC854D-H in demultiplexed CMOS mode?

In demultiplexed CMOS output mode, the DC854D-H exhibits a fixed data latency of 7 clock cycles from encode edge to valid output data on either the DA or DB bus. This deterministic latency simplifies timing closure in FPGA-based signal processing pipelines and enables precise synchronization across multiple ADC channels in phased-array systems.