Analog Devices Inc. DC1565A-D

Overview

DC1565A-D from Analog Devices (formerly Linear Technology) is a high-speed evaluation board for the LTC2152-12 12-bit, 250Msps analog-to-digital converter. It provides full access to DDR LVDS digital outputs, configurable clocking with duty cycle stabilization, and programmable power modes - enabling rapid validation of undersampling RF receiver architectures in cellular basestations and software-defined radios.

For engineers reviewing the DC1565A-D datasheet, DC1565A-D pinout, DC1565A-D application, or DC1565A-D equivalent, this board supports real-time FFT analysis up to 1.25GHz input bandwidth, offers SPI-configurable LVDS current (1.75mA/3.5mA), and delivers verified 68.5dB SNR and 90dB SFDR performance at 250Msps - critical for high-fidelity signal digitization in demanding communications systems.

Technical Context

The DC1565A-D implements a complete signal chain around the LTC2152-12 ADC, including transformer-coupled differential analog input with adjustable common-mode bias via VCM, low-jitter clock conditioning circuitry supporting sine wave, LVDS, or PECL inputs, and on-board termination for all DDR LVDS output pairs. The board integrates dedicated power sequencing and decoupling for both VDD (1.8V analog) and OVDD (1.8V output) rails.

It enables direct evaluation of key ADC features: optional clock duty cycle stabilizer, Nap/Sleep mode power management (<2mW sleep), serial SPI configuration interface (CS/SCK/SDI/SDO), and PAR/SER-selectable programming mode. All 40-pin QFN signals are routed to test points or edge connectors for oscilloscope probing and FPGA interfacing.

Key Specifications

Availability

DC1565A-D is available at Aetrix Electronics and suitable for cellular basestation development, software-defined radio prototyping, and high-definition video digitization requiring stable component supply and immediate lab-ready evaluation capability.

Supply support for DC1565A-D 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 semiconductors, serving precision instrumentation, communications, and industrial markets.

The DC1565A-D belongs to Analog Devices' high-speed ADC evaluation platform family, designed specifically to accelerate time-to-validation for RF-sampling data converters used in wideband receivers, spectrum analyzers, and radar front-ends.

FAQ

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

The DC1565A-D evaluation board is a fully assembled and tested hardware platform for evaluating the LTC2152-12 12-bit, 250Msps analog-to-digital converter. It provides signal conditioning, power regulation, clock interface, and DDR LVDS output routing - allowing engineers to characterize AC/DC performance, validate system integration, and develop firmware without custom PCB design. The DC1565A-D enables immediate testing of undersampling, SFDR, and SNR metrics under real-world RF conditions.

Does the DC1565A-D support all operating modes of the LTC2152-12?

Yes, the DC1565A-D supports all documented operating modes of the LTC2152-12, including DDR LVDS output current selection (1.75mA or 3.5mA), clock duty cycle stabilization, Nap mode (105mW), Sleep mode (<2mW), and serial SPI configuration via CS/SCK/SDI/SDO. The PAR/SER pin is accessible for mode selection, and all control signals are routed to headers or test points for external logic control or microcontroller interfacing.

Can the DC1565A-D be used with the LTC2151-12 or LTC2150-12?

No - the DC1565A-D is specifically designed and optimized for the LTC2152-12 (250Msps variant). While the LTC2151-12 and LTC2150-12 share the same 40-lead QFN package and pinout, the DC1565A-D's clock distribution, power delivery, and layout tuning target the higher sample rate and associated timing margins of the LTC2152-12. Using it with lower-speed variants is not recommended due to unvalidated signal integrity and thermal behavior.

What clock sources are compatible with the DC1565A-D?

The DC1565A-D accepts differential clock inputs via SMA connector and supports sine wave, LVDS, PECL, TTL, or CMOS drive levels on ENC+/ENC–. It includes onboard clock conditioning circuitry that maintains jitter performance across duty cycles, and the optional duty cycle stabilizer inside the LTC2152-12 can be enabled via SPI. The board does not include an on-board oscillator; external clock generation is required.

Is the DC1565A-D RoHS-compliant and lead-free?

Yes, the DC1565A-D evaluation board complies with RoHS Directive 2011/65/EU and uses lead-free finishes throughout. Its PCB, components, and solder mask meet IPC-J-STD-609A Class 1 requirements. The board ships with documentation confirming compliance, and all passive and active components on the DC1565A-D are qualified for lead-free reflow profiles per JEDEC J-STD-020.