Analog Devices Inc. DC1565A-B

Overview

DC1565A-B from Analog Devices (formerly Linear Technology) is a high-performance evaluation board for the LTC2152-14 14-bit, 250Msps analog-to-digital converter. It provides full access to DDR LVDS digital outputs, configurable clocking with duty cycle stabilization, SPI-based register control, and optimized analog input path supporting 1.5VP-P differential signals up to 1.25GHz bandwidth. Designed for RF sampling in SDR and communications infrastructure.

For engineers reviewing the DC1565A-B datasheet, DC1565A-B pinout, DC1565A-B application, or DC1565A-B equivalent, this page delivers verified hardware configuration details, signal integrity guidance for 250Msps DDR LVDS interfaces, layout-critical power delivery recommendations, and validated test setup procedures for SNR/SFDR characterization per LTC2152-14 specifications.

Technical Context

The DC1565A-B implements a complete signal chain around the LTC2152-14 ADC, including ultra-low-jitter clock conditioning via the HMC7044 clock generator, matched 50Ω differential analog input path with transformer-coupled or balun-driven options, and on-board termination for all 14-bit DDR LVDS data lanes and CLKOUT/OF signals. It supports both internal and external reference modes via SENSE pin routing.

Board-level features include programmable LVDS output current (1.75mA or 3.5mA), SPI interface accessible via USB-SPI adapter or header, Nap/Sleep mode control, and thermal management via exposed pad soldering to multi-layer ground plane. All critical timing paths-including ENC± skew, tD/tC delays, and pipeline latency (6 cycles)-are preserved per LTC2152-14 spec.

Key Specifications

Availability

DC1565A-B is available at Aetrix Electronics and suitable for cellular basestation development, software-defined radio prototyping, and high-definition video digitization requiring stable component supply, traceable evaluation hardware, and documented performance validation against LTC2152-14 datasheet limits.

Supply support for DC1565A-B 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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving precision instrumentation, communications, and industrial markets.

The DC1565A-B belongs to Analog Devices' Linear Technology Evaluation Board product line, engineered to accelerate time-to-test for high-speed ADCs by providing production-ready layouts, calibrated measurement setups, and application-specific firmware examples.

FAQ

What is the primary function of the DC1565A-B evaluation board?

The DC1565A-B evaluation board is a fully assembled and tested platform designed specifically for evaluating the LTC2152-14 14-bit, 250Msps analog-to-digital converter. It enables engineers to validate AC performance (SNR, SFDR), DC accuracy (INL/DNL), timing behavior, and system integration without custom PCB design. The DC1565A-B includes all necessary clocking, power regulation, signal conditioning, and interface circuitry required to operate the LTC2152-14 under real-world conditions.

Does the DC1565A-B support both internal and external voltage references for the LTC2152-14?

Yes, the DC1565A-B supports both reference configurations. It routes the SENSE pin to a jumper-selectable option: connecting SENSE to VDD enables the internal 1.25V reference and ±0.75V input range, while applying an external 1.2–1.3V reference to SENSE selects a ±0.6 × VSENSE input range. The board includes dedicated test points and filtering for clean external reference injection, ensuring compliance with LTC2152-14's ±1mV SENSE leakage and ±30ppm/°C VREF drift specs.

How is DDR LVDS output termination handled on the DC1565A-B?

The DC1565A-B leverages the LTC2152-14's integrated 100Ω on-chip termination resistors between each differential LVDS pair (e.g., D0_1+, D0_1–). No external termination is required on the board itself-only proper 100Ω differential routing and connector impedance matching (e.g., Samtec QSH/QTH headers) are needed. This matches the LTC2152-14's specified VOD (247–454mV) and VOS (1.125–1.375V) under 100Ω load, enabling direct connection to FPGA or ASIC receivers compliant with ANSI TIA/EIA-644-A.

Can the DC1565A-B be used to evaluate lower-speed variants like the LTC2151-14 or LTC2150-14?

Yes-the DC1565A-B is mechanically and electrically compatible with the pin-compatible LTC2151-14 (210Msps) and LTC2150-14 (170Msps) due to identical 40-lead (6mm × 6mm) QFN packaging, shared pinout, and identical power/signal interface requirements. Firmware and test scripts may require minor clock rate adjustments, but no hardware modification is needed. All DC1565A-B documentation references LTC2152-14/LTC2151-14/LTC2150-14 collectively.

What clock sources are supported for the ENC± inputs on the DC1565A-B?

The DC1565A-B accepts differential clock inputs via SMA connectors routed directly to the ENC+ (Pin 11) and ENC– (Pin 12) of the LTC2152-14. It supports sine wave, PECL, LVDS, TTL, or CMOS drive per LTC2152-14 spec, with onboard 50Ω series termination and AC coupling. The board also integrates the HMC7044 clock generator for jitter-cleaned, duty-cycle-stabilized clocks-critical for achieving the datasheet's 0.15psRMS aperture jitter and 70dB SNR at 250Msps.