Analog Devices Inc. DC1565A-E

Overview

DC1565A-E from Analog Devices (formerly Linear Technology) is a high-performance 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 flexible analog input termination - enabling precise characterization of SNR (68.5dB), SFDR (90dB), and 1.25GHz full-power bandwidth in demanding RF sampling applications such as software-defined radios and cellular basestations.

For engineers reviewing the DC1565A-E datasheet, DC1565A-E pinout, DC1565A-E application, or DC1565A-E equivalent, this page delivers verified hardware configuration details, supported ADC operating modes (Nap/Sleep), SPI register mapping, differential input drive requirements, and layout-critical decoupling guidance for high-fidelity wideband digitization.

Technical Context

The DC1565A-E implements a complete signal chain around the LTC2152-12, featuring transformer-coupled and balun-based analog input paths with selectable AC/DC coupling, on-board 1.8V LDOs for VDD/OVDD, and impedance-matched 100Ω differential LVDS routing to SMA connectors. Clock conditioning includes both external differential clock injection (via SMA) and internal generation using the LTC6957-3, supporting jitter-sensitive undersampling up to 907MHz.

It supports all LTC2152-12 functional modes via on-board jumpers and SPI interface: DDR LVDS current selection (1.75mA/3.5mA), clock duty cycle stabilizer enable/disable, Nap/Sleep mode entry, and PAR/SER programming mode selection - with real-time register readback through the USB-SPI interface and LTspice-compatible schematic documentation.

Key Specifications

Availability

DC1565A-E is available at Aetrix Electronics and suitable for software-defined radio development, high-definition video capture systems, and test & measurement instrument design requiring stable component supply and proven reference hardware for ultra-wideband ADC validation.

Supply support for DC1565A-E 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 DC1565A-E belongs to ADI's Linear Technology Evaluation Board product line, engineered specifically to accelerate time-to-validation for high-speed data converters by providing production-ready layouts, calibrated performance data, and comprehensive firmware tools.

FAQ

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

The DC1565A-E evaluation board is designed exclusively to evaluate the LTC2152-12 12-bit, 250Msps analog-to-digital converter. It provides full hardware and firmware support for characterizing dynamic performance (SNR, SFDR), validating DDR LVDS timing, configuring SPI-accessible modes (Nap, Sleep, duty cycle stabilization), and implementing real-world RF sampling signal chains - all without requiring custom PCB development. The DC1565A-E enables immediate lab testing of the LTC2152-12 under specified conditions.

Does the DC1565A-E support all three members of the LTC215x-12 family?

No - the DC1565A-E is specifically optimized and validated for the LTC2152-12 (250Msps). While the LTC2151-12 (210Msps) and LTC2150-12 (170Msps) share identical pinouts and register maps, the DC1565A-E's clock distribution network, power delivery stability margins, and layout parasitics are tuned for 250Msps operation. Using it with lower-speed variants is possible but not characterized or guaranteed to meet datasheet AC specs at full resolution.

How is analog input drive implemented on the DC1565A-E?

The DC1565A-E provides two independent analog input paths: one using a Mini-Circuits TC3-1T+ broadband transformer (50Ω to 100Ω differential), and another using an LT5560 active balun for single-ended-to-differential conversion. Both paths include selectable AC/DC coupling, 50Ω input termination, and direct connection to the LTC2152-12's AIN+/AIN– pins. Input common-mode bias is sourced from the LTC2152-12's VCM pin, ensuring compliance with the required 1.5VP-P differential swing centered at 0.439×VDD.

Can the DC1565A-E generate its own sampling clock?

Yes - the DC1565A-E integrates an LTC6957-3 low-jitter clock generator that accepts an external 10MHz reference and synthesizes a precise, programmable sampling clock (up to 250MHz) with adjustable phase and duty cycle. This eliminates dependency on external clock sources during bench validation and allows jitter sensitivity analysis. The LTC6957-3 output drives the ENC+/ENC– inputs of the LTC2152-12 directly, and its duty cycle stabilizer feature is fully accessible via the board's SPI interface.

What software tools are provided for the DC1565A-E?

Analog Devices supplies the DC1565A-E with the LTC2152-12 Demo Manual (DC1565A-E-12), LTspice simulation models for the full signal chain, and the QSPI GUI software - a Windows-based application that enables real-time SPI register read/write, automatic FFT acquisition via connected oscilloscopes, and export of SNR/SFDR plots. All firmware, schematics, and PCB layout files are available under ADI's open evaluation board license for derivative design reuse.