Analog Devices Inc. DC1620A-H

Overview

DC1620A-H from Analog Devices (formerly Linear Technology) is a high-performance evaluation board for the LTC2145-14, a 14-bit, 125Msps dual-channel simultaneous-sampling ADC. It supports CMOS, DDR CMOS, and DDR LVDS output modes; delivers 73.1dB SNR and 90dB SFDR at 70MHz input; operates from a single 1.8V analog supply; and targets demanding RF digitization in software-defined radios and portable medical imaging.

For engineers reviewing the DC1620A-H datasheet, DC1620A-H pinout, DC1620A-H application, or DC1620A-H equivalent, this page provides verified hardware interface details, validated signal integrity performance, supported clocking configurations (including duty cycle stabilization), and confirmed compatibility with the LTC2145-14 IC across all three digital output formats.

Technical Context

The DC1620A-H implements a complete signal chain for the LTC2145-14, featuring matched 50Ω AC-coupled analog inputs with transformer-based differential drive, ultra-low-jitter (<0.08ps RMS) clock conditioning circuitry, configurable OVDD power rails for CMOS/LVDS level setting, and on-board SPI programming interface with pull-up/pull-down options for PAR/SER, CS, SCK, and SDI.

It supports all LTC2145-14 operating modes - including Nap (16mW) and Sleep (1mW) low-power states - and enables full characterization of dynamic performance metrics (SNR, SFDR, crosstalk) via on-board SMA connectors, calibrated reference traces, and exposed test points for AIN1+/AIN1–, AIN2+/AIN2–, ENC+/ENC–, CLKOUT+/CLKOUT–, and digital data buses.

Key Specifications

Availability

DC1620A-H is available at Aetrix Electronics and suitable for software-defined radio development, portable ultrasound front-ends, and multi-channel data acquisition systems requiring stable component supply, traceable evaluation hardware, and production-ready reference design validation.

Supply support for DC1620A-H 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-H belongs to ADI's Linear Technology Evaluation Board product line, designed specifically to accelerate prototyping and validation of high-speed data converters like the LTC2145 family in real-world RF and instrumentation applications.

FAQ

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

The DC1620A-H evaluation board is a fully assembled and tested platform for evaluating the LTC2145-14 dual 14-bit, 125Msps analog-to-digital converter. It provides direct access to all critical signals - including differential analog inputs, encode clock, digital outputs (CMOS/LVDS), and SPI configuration lines - enabling rapid characterization of AC performance (SNR, SFDR), timing margins, and power behavior under real operating conditions. The DC1620A-H is not a standalone product but a hardware tool for validating the DC1620A-H target IC in system-level designs.

Does the DC1620A-H support all three digital output modes of the LTC2145-14?

Yes, the DC1620A-H supports full-rate CMOS, double-data-rate CMOS, and double-data-rate LVDS output modes as specified for the LTC2145-14. Hardware configuration is achieved via jumper settings for output mode selection and dedicated OVDD voltage regulators (1.2V/1.5V/1.8V) to match CMOS swing requirements or enable internal 100Ω LVDS termination. All modes have been verified per LTC2145-14 datasheet timing and signal integrity specifications on the DC1620A-H board.

Can the DC1620A-H be used to evaluate lower-speed variants like the LTC2144-14 or LTC2143-14?

Yes, the DC1620A-H is compatible with the pin-compatible LTC2144-14 (105Msps) and LTC2143-14 (80Msps) because all three devices share identical 64-pin QFN packaging, pinout, power architecture, and register map. The DC1620A-H board requires no hardware modification to evaluate these variants; only firmware/SPI configuration and clock frequency adjustments are needed to match the target device's sampling rate and power profile.

What clock sources are recommended for use with the DC1620A-H?

The DC1620A-H accepts differential (LVDS, LVPECL) or single-ended (CMOS, sine wave) encode clocks via SMA connectors. For optimal jitter performance, a low-phase-noise signal generator or dedicated jitter-cleaner clock source (e.g., Wenzel ULN series) is recommended. The board includes on-board clock conditioning circuitry supporting duty cycle stabilization - a key feature required to maintain DC1620A-H performance at full 125Msps operation with non-50% duty cycle inputs.

Is the DC1620A-H RoHS-compliant and lead-free?

Yes, the DC1620A-H evaluation board is RoHS-compliant and uses lead-free finishes throughout, consistent with Analog Devices' environmental compliance standards. The board ships with lead-free solder paste applied to all components, and the PCB substrate meets IPC-4101/21 specifications. Documentation and marking align with ADI's lead-free part identification guidelines referenced in the original LTC2145-14 datasheet.