Analog Devices Inc. DC1369A-J

Overview

DC1369A-J from Analog Devices (formerly Linear Technology) is a fully populated, ready-to-use evaluation board for the LTC2258-12 12-bit, 65Msps ultralow-power analog-to-digital converter. It features CMOS and DDR LVDS output modes, 71.1dB SNR, 88dB SFDR, single 1.8V supply operation, and supports differential analog input up to 800MHz full-power bandwidth - enabling high-fidelity digitization of IF signals in software-defined radio and portable medical imaging systems.

For engineers reviewing the DC1369A-J datasheet, DC1369A-J pinout, DC1369A-J application, or DC1369A-J equivalent, this page delivers verified hardware configuration details, supported ADC operating modes (full-rate CMOS, DDR CMOS, DDR LVDS), clock interface requirements (differential ENC+/ENC– with optional duty cycle stabilizer), and layout-critical power/grounding practices validated per Linear's reference design.

Technical Context

The DC1369A-J implements the LTC2258-12 in its highest-speed variant (65Msps), with on-board differential clock conditioning, selectable input termination (100Ω or 50Ω), and configurable output drive (CMOS/LVDS). It integrates the required 1.8V analog (VDD) and digital (OVDD) supplies with low-noise LDOs and comprehensive decoupling - directly supporting the ADC's 0.17psRMS aperture jitter specification and ±0.3LSB INL performance.

Board-level signal integrity is maintained via controlled-impedance routing for analog inputs, clock paths, and DDR LVDS data lanes; the exposed thermal pad of the UJ-package LTC2258-12 is soldered to a solid internal ground plane, and all critical analog/digital grounds are separated but joined at a single point near the ADC's GND/OGND pins per Linear's layout guidelines.

Key Specifications

Availability

DC1369A-J is available at Aetrix Electronics and suitable for software-defined radio development, cellular base station prototyping, and portable medical ultrasound imaging requiring stable component supply, traceable sourcing, and long-term evaluation platform availability.

Supply support for DC1369A-J 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, acquired Linear Technology in 2017 to strengthen its precision data conversion portfolio.

The DC1369A-J belongs to ADI's Linear Technology Evaluation Board product line, designed specifically to accelerate validation and system integration of high-speed ADCs like the LTC2258 family in demanding communications and instrumentation applications.

FAQ

What is the primary function of the DC1369A-J evaluation board?

The DC1369A-J evaluation board is a complete hardware platform for evaluating the LTC2258-12 12-bit, 65Msps analog-to-digital converter. It provides all necessary power regulation, clock conditioning, analog input interface, and digital output routing - allowing engineers to rapidly validate AC/DC performance, test different output modes (CMOS/LVDS), and integrate the ADC into real-world signal chains without custom PCB design. The DC1369A-J includes documented schematics, layout files, and test procedures aligned with Linear Technology's original reference design.

Does the DC1369A-J support both CMOS and LVDS output configurations for the LTC2258-12?

Yes, the DC1369A-J fully supports all three digital output configurations specified for the LTC2258-12: full-rate CMOS, double-data-rate (DDR) CMOS, and DDR LVDS. Jumper settings and on-board termination resistors allow hardware selection between modes, while the SPI interface (via CS/SCK/SDI/SDO) enables runtime reconfiguration of output format, randomizer, duty cycle stabilizer, and power modes - all verified per the LTC2258-12 datasheet timing and voltage specifications.

What analog input interface options does the DC1369A-J provide for the LTC2258-12?

The DC1369A-J offers a high-fidelity differential analog input path optimized for the LTC2258-12's 800MHz full-power bandwidth. It includes SMA connectors with selectable 50Ω or 100Ω input termination, transformer-coupled or direct-coupled paths, and precise impedance-matched routing to the AIN+/AIN– pins. The board also supports DC-coupled operation with adjustable common-mode bias via the VCM output, and accommodates both internal (±0.5V/±1V) and external reference configurations through the SENSE pin - all implemented per Linear's recommended layout and grounding practices.

How is power delivered and managed on the DC1369A-J for the LTC2258-12?

The DC1369A-J uses two independent, low-noise 1.8V LDO regulators: one for the LTC2258-12's analog core (VDD) and another for its digital outputs (OVDD). Each rail is decoupled with multiple 0.1µF X7R ceramic capacitors placed adjacent to the UJ-package pins and bulk 2.2µF tantalum capacitors near the LDO outputs. The board enforces strict separation of analog (GND) and output (OGND) ground planes, joined only at a single point beneath the ADC - ensuring the LTC2258-12 achieves its specified 71.1dB SNR and 0.17psRMS jitter under real operating conditions.

Can the DC1369A-J be used to evaluate lower-speed variants like the LTC2257-12 or LTC2256-12?

Yes, the DC1369A-J is compatible with the pin-compatible LTC2257-12 (40Msps) and LTC2256-12 (25Msps) due to identical QFN-40 UJ packaging, shared register map, and overlapping electrical specifications. While optimized for the 65Msps LTC2258-12, the board's clock generation, power delivery, and signal integrity architecture fully support the lower-speed variants - enabling comparative evaluation across the family using identical hardware, firmware, and measurement setup. Performance metrics (e.g., SNR, SFDR) will scale per each device's rated sample rate and corresponding dynamic characteristics.