Analog Devices Inc. DC1369A-K

Overview

DC1369A-K from Analog Devices (formerly Linear Technology) is a demonstration board for the LTC2258-12, a 12-bit, 65Msps ultralow-power analog-to-digital converter. It features 71.1dB SNR, 88dB SFDR, single 1.8V supply operation, and supports CMOS, DDR CMOS, or DDR LVDS digital outputs in a 40-pin QFN package. It is designed for high-frequency signal digitization in communications infrastructure.

For engineers reviewing the DC1369A-K datasheet, DC1369A-K pinout, DC1369A-K application, or DC1369A-K equivalent, this board enables rapid evaluation of the LTC2258-12's undersampling performance at IF frequencies up to 140MHz, its low-jitter (0.17psRMS) acquisition, configurable input range (1–2VP-P), and SPI-configurable modes including duty cycle stabilization and output randomization.

Technical Context

The DC1369A-K implements the full reference design for the LTC2258-12 ADC, including optimized layout for analog input path integrity, differential clock conditioning, and decoupled analog/digital power domains. It supports all three output formats-full-rate CMOS, double-data-rate CMOS, and double-data-rate LVDS-with selectable termination and output voltage swing via OVDD.

It integrates the required external components for internal reference operation (VREF = 1.25V, VCM = 0.9V), provides access to all mode-control pins (PAR/SER, CS, SCK, SDI, SDO), and exposes critical analog nodes (AIN+, AIN–, REFH/REFL, SENSE) for signal injection, bias tuning, and reference validation under real-world RF front-end conditions.

Key Specifications

Availability

DC1369A-K is available at Aetrix Electronics and suitable for cellular base station development, software-defined radio prototyping, portable medical imaging subsystems, and multi-channel data acquisition systems requiring stable component supply and validated high-speed ADC evaluation platforms.

Supply support for DC1369A-K 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 communications, industrial, automotive, and healthcare markets.

The DC1369A-K belongs to ADI's Linear Technology legacy evaluation board portfolio, specifically engineered to accelerate time-to-test for high-speed, low-power pipeline ADCs used in demanding wideband receiver applications.

FAQ

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

The DC1369A-K evaluation board is a fully assembled and tested hardware platform designed exclusively to demonstrate and evaluate the LTC2258-12 12-bit, 65Msps analog-to-digital converter. It provides all necessary power regulation, clock conditioning, analog input coupling, and digital output interfacing to validate AC performance-including 71.1dB SNR and 88dB SFDR-at IF frequencies up to 140MHz. The DC1369A-K enables immediate lab characterization without custom PCB design.

Does the DC1369A-K support all output modes of the LTC2258-12?

Yes, the DC1369A-K supports all three digital output configurations of the LTC2258-12: full-rate CMOS, double-data-rate (DDR) CMOS, and DDR LVDS. Jumper settings and on-board resistors allow selection between these modes, and the board includes proper termination networks-such as 100Ω on-chip LVDS termination and configurable pull-ups for CMOS outputs-to ensure signal integrity across all modes. This flexibility makes the DC1369A-K ideal for verifying system-level timing and interface compatibility.

How is the analog input range configured on the DC1369A-K?

The DC1369A-K implements the LTC2258-12's SENSE pin functionality to configure input range: connecting SENSE to ground selects ±0.5V, to VDD selects ±1V, and applying an external voltage (0.625V–1.3V) sets ±0.8×VSENSE. The board provides test points and solder jumpers for all three options, enabling direct verification of dynamic range trade-offs-such as SNR vs. full-scale headroom-under real signal conditions. This matches the exact behavior documented in the LTC2258-12 datasheet.

Can the DC1369A-K be used with external clock sources?

Yes, the DC1369A-K accepts differential clock inputs via the ENC+/ENC– terminals and supports single-ended clocks by grounding ENC–. It accommodates sine wave, PECL, LVDS, TTL, and CMOS clock signals per the LTC2258-12 specification. The board includes AC-coupling capacitors and optional transformer-based clock conditioning to minimize jitter injection-critical for achieving the device's specified 0.17psRMS aperture jitter. This ensures accurate evaluation of undersampling performance in RF receiver designs.

Is SPI configuration supported on the DC1369A-K for the LTC2258-12?

Yes, the DC1369A-K provides full access to the LTC2258-12's SPI interface through dedicated headers for CS, SCK, SDI, and SDO. It supports both write and readback operations for configuring features such as the data output randomizer, clock duty cycle stabilizer, nap/sleep modes, and output format selection. The board includes pull-up/pull-down resistors aligned with the LTC2258-12's logic thresholds, ensuring reliable communication at up to 25MHz SCK frequency as specified in the datasheet.