Analog Devices Inc. DC1620A-I

Overview

DC1620A-I from Analog Devices (formerly Linear Technology) is a demonstration board for the LTC2145IUP-14, a 14-bit, 125Msps dual-channel simultaneous-sampling ADC with 73.1dB SNR, 90dB SFDR, and 750MHz full-power bandwidth. It operates from a single 1.8V supply, supports CMOS/DDR CMOS/DDR LVDS outputs, and targets high-dynamic-range IF sampling in software-defined radios and portable medical imaging systems.

For engineers reviewing the DC1620A-I datasheet, DC1620A-I pinout, DC1620A-I application, or DC1620A-I equivalent, this page delivers verified hardware interface details, confirmed analog input conditioning, supported clocking configurations, and validated evaluation platform compatibility with LTC2145-14 family devices - all critical for rapid prototyping of wideband data acquisition systems.

Technical Context

The DC1620A-I implements a complete signal chain around the LTC2145IUP-14, including ultra-low-jitter differential clock conditioning (0.08ps RMS), precision 2V_P-P analog input front-end with VCM biasing, and configurable digital output termination for CMOS or DDR LVDS modes. It supports both internal and external reference configurations via the SENSE pin.

Board-level features include on-board LDO regulation for clean 1.8V analog and digital supplies, exposed thermal pad soldering for thermal management, and parallel/serial SPI programming interfaces accessible via headers. The design accommodates differential sine-wave, PECL, LVDS, TTL, or CMOS clock inputs and enables optional clock duty cycle stabilization.

Key Specifications

Availability

DC1620A-I is available at Aetrix Electronics and suitable for software-defined radio development, portable ultrasound systems, and multi-channel test instrumentation requiring stable component supply and proven evaluation platform validation.

Supply support for DC1620A-I 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 ICs for precision measurement and high-speed data conversion.

The DC1620A-I belongs to Analog Devices' LTC Demonstration Board product line, engineered specifically to accelerate evaluation and system integration of their high-speed, high-resolution ADC families - particularly for demanding communications and medical imaging applications.

FAQ

What is the primary function of the DC1620A-I evaluation board?

The DC1620A-I evaluation board is a fully assembled and tested hardware platform designed to demonstrate and evaluate the LTC2145IUP-14 dual-channel 14-bit 125Msps ADC. It provides all necessary power regulation, clock conditioning, analog input buffering, and digital output interfacing to enable immediate functional validation and performance characterization of the DC1620A-I target device in real-world signal chain applications.

Does the DC1620A-I support both CMOS and LVDS digital output formats?

Yes, the DC1620A-I supports full-rate CMOS, double-data-rate (DDR) CMOS, and DDR LVDS output modes as configured via the LTC2145IUP-14's PAR/SER pin and SPI register settings. The board includes appropriate termination networks and OVDD supply routing to ensure signal integrity for each mode, with OVDD selectable between 1.2V–1.8V for CMOS and 1.7V–1.9V for LVDS operation.

Can the DC1620A-I be used with the LTC2144-14 or LTC2143-14 variants?

Yes, the DC1620A-I is compatible with the entire LTC2145/LTC2144/LTC2143-14 family. All three parts share identical pinouts, package (64-pin QFN), and core architecture. The board's firmware and hardware configuration accommodate the different sample rates (125/105/80 Msps) and corresponding power profiles, making DC1620A-I a unified evaluation solution across the family.

What clock input types does the DC1620A-I accept for the LTC2145IUP-14?

The DC1620A-I accepts differential (ENC+/ENC–) or single-ended (ENC+ referenced to GND) clock inputs, supporting sine wave, PECL, LVDS, TTL, and CMOS logic levels. The board includes AC-coupling and biasing circuitry optimized for <0.08ps RMS jitter performance, and supports optional clock duty cycle stabilization via the CS pin per LTC2145IUP-14 specifications.

How is analog input range configured on the DC1620A-I?

Analog input range on the DC1620A-I is configured via the SENSE pin of the LTC2145IUP-14: connecting SENSE to GND selects ±0.5V range; to VDD selects ±1V range; and applying an external voltage (0.625V–1.3V) sets ±0.8×V_SENSE. The DC1620A-I provides test points and jumpers to implement all three configurations without soldering changes.