Analog Devices Inc. DC1620A-G

Overview

DC1620A-G from Analog Devices (formerly Linear Technology) is a demonstration board for the LTC2145-14, a 14-bit, 125Msps dual-channel simultaneous-sampling ADC. It delivers 73.1dB SNR, 90dB SFDR, and ultralow 0.08psRMS jitter, operating from a single 1.8V supply with CMOS/DDR CMOS/DDR LVDS output options. It supports high-fidelity digitization in software-defined radios and portable medical imaging systems.

For engineers reviewing the DC1620A-G datasheet, DC1620A-G pinout, DC1620A-G application, or DC1620A-G equivalent, this page provides verified hardware interface details, real-world performance benchmarks, supported input ranges (1–2VP-P), clock duty cycle stabilization, and SPI-configurable modes - all critical for RF receiver front-end and multi-channel data acquisition design validation.

Technical Context

The DC1620A-G implements the LTC2145-14 in full-rate CMOS or DDR LVDS output mode, with independent analog input channels (AIN1±, AIN2±), programmable reference selection via SENSE pin, and configurable encode timing using ENC+/ENC– differential or single-ended clocking. It integrates on-board clock conditioning, reference decoupling (REFH/REFL, VREF), and common-mode bias generation (VCM1/VCM2).

Hardware configuration is managed through PAR/SER mode selection, enabling either serial SPI programming (CS/SCK/SDI/SDO) or parallel logic control. The board supports optional data randomization, nap/sleep power states, and external reference injection - all accessible via documented jumper and header configurations per the DC1620A-G user guide.

Key Specifications

Availability

DC1620A-G is available at Aetrix Electronics and suitable for software-defined radio development, portable ultrasound front-ends, and multi-channel test instrumentation requiring stable component supply and validated reference design implementation.

Supply support for DC1620A-G 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 DC1620A-G belongs to ADI's Linear Technology evaluation board portfolio, designed specifically to accelerate prototyping and characterization of high-speed precision ADCs in demanding RF and instrumentation applications.

FAQ

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

The DC1620A-G evaluation board is a fully assembled and tested hardware platform for evaluating the LTC2145-14 dual 14-bit 125Msps ADC. It provides immediate access to all device pins, configurable output modes (CMOS/LVDS), reference options, and SPI-based register control - enabling rapid validation of dynamic performance, timing margins, and system integration without custom PCB design. DC1620A-G includes calibrated clock distribution and analog input conditioning circuits.

Does the DC1620A-G support both differential and single-ended clock inputs for the LTC2145-14?

Yes, the DC1620A-G supports both differential (ENC+/ENC–) and single-ended (ENC+ to GND) clock drive modes for the LTC2145-14, as specified in the LTC2145-14 datasheet. The board routes ENC+/ENC– to SMA connectors with AC-coupling and termination options, and includes jumpers to tie ENC– to ground for single-ended operation. This flexibility allows DC1620A-G users to match their system clock architecture without signal integrity compromise.

Can the DC1620A-G be used to evaluate the LTC2144-14 or LTC2143-14 variants?

Yes, the DC1620A-G is compatible with the pin-compatible LTC2144-14 (105Msps) and LTC2143-14 (80Msps) variants, as confirmed by the LTC2145-14/LTC2144-14/LTC2143-14 family datasheet and DC1620A-G documentation. All three devices share identical 64-pin QFN packaging, pinout, power sequencing, and register map - allowing DC1620A-G to serve as a unified evaluation platform across the speed-grade family with only firmware and clock source adjustments required.

What output interface modes are physically implemented and tested on the DC1620A-G?

The DC1620A-G implements and validates all three output interface modes supported by the LTC2145-14: full-rate CMOS, double-data-rate (DDR) CMOS, and DDR LVDS. Each mode is enabled via dedicated onboard jumpers and verified with oscilloscope eye diagrams and FPGA capture. DDR LVDS outputs include matched 100Ω differential routing and on-die termination, while CMOS modes support OVDD from 1.2V to 1.8V - all documented in the DC1620A-G user guide.

How does the DC1620A-G handle analog input common-mode biasing for the LTC2145-14?

The DC1620A-G uses the LTC2145-14's internal VCM1 and VCM2 pins to generate precise 0.9V common-mode bias (at VDD = 1.8V) for both analog input channels, routed directly to AIN1± and AIN2± via low-inductance paths. Onboard 0.1μF ceramic bypass capacitors stabilize each VCM output, and SMA input connectors include DC-blocking capacitors and resistor networks to preserve common-mode integrity - ensuring optimal SNR and linearity per the LTC2145-14 specification.