Analog Devices Inc. DC2425A-A

Overview

DC2425A-A from Analog Devices (formerly Linear Technology) is a demonstration board for the LTC2311-16 16-bit, 5Msps differential SAR ADC. It enables rapid evaluation of high-speed data acquisition with ±3LSB INL, 81dB SNR, and wide-input common-mode range under 3.3V/5V supply. Designed for lab validation of precision analog front-ends in optical networking and motor control systems.

For engineers reviewing the DC2425A-A datasheet, DC2425A-A pinout, DC2425A-A application, or DC2425A-A equivalent, this board provides verified LVDS/CMOS interface timing, reference buffer stability testing, and real-world SNR/THD characterization at 2.2MHz input - critical for high-fidelity signal chain design and FPGA-based acquisition system integration.

Technical Context

The DC2425A-A implements the LTC2311-16 in MSOP-16 package with full support for both CMOS and LVDS serial interfaces, configurable via the CMOS/LVDS pin. It integrates decoupling (1µF VDD, 10µF REFOUT/REFIN), differential input conditioning networks (25Ω series + 47pF shunt), and OVDD-supplied I/O logic compatible with 1.8V–2.5V host systems.

Board-level features include on-board 4.096V internal reference with external 1.25V buffered REFIN option, nap/sleep mode control headers, and direct access to all 17 terminals including exposed thermal pad. Timing-critical signals (CNV, SCK, SDO) are routed with controlled impedance and minimal stub length to preserve 105MHz LVDS clock integrity.

Key Specifications

Availability

DC2425A-A is available at Aetrix Electronics and suitable for high-speed data acquisition systems, optical networking transceivers, and multiphase motor control applications requiring stable component supply and proven evaluation platform traceability.

Supply support for DC2425A-A 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 industrial, automotive, communications, and healthcare markets.

The DC2425A-A belongs to ADI's Linear Technology legacy evaluation board portfolio, specifically designed to accelerate prototyping and validation of precision, high-speed ADCs in demanding signal chain applications.

FAQ

What is the primary function of the DC2425A-A evaluation board?

The DC2425A-A evaluation board is a fully assembled and tested platform for the LTC2311-16 16-bit, 5Msps differential SAR ADC. It provides immediate access to all device pins, pre-validated power sequencing, reference configuration options, and signal conditioning networks - enabling engineers to characterize dynamic performance (SNR, THD, SFDR), verify LVDS/CMOS interface timing, and integrate the DC2425A-A into FPGA- or DSP-based acquisition systems without custom PCB development.

Does the DC2425A-A support both CMOS and LVDS interface modes for the LTC2311-16?

Yes, the DC2425A-A supports both interface modes. A dedicated jumper selects between CMOS (single-ended SDO/SCK referenced to OVDD) and LVDS (differential SDO+/SDO– and SCK+/SCK– with 100Ω termination). The board routes signals with controlled impedance and includes termination resistors and decoupling capacitors aligned with LTC2311-16 datasheet recommendations for each mode - ensuring reliable 105MHz LVDS clock operation and noise-immune CMOS communication.

Can the DC2425A-A be used with an external reference instead of the internal 4.096V REFOUT?

Yes, the DC2425A-A supports external reference operation. The REFIN pin is accessible and can be grounded to disable the internal REFOUT buffer, allowing an external 1.25V–VDD reference to drive REFOUT directly. The board includes test points and solder jumpers for clean reference injection, and its 10µF X5R ceramic capacitor on REFOUT is compatible with external reference stability requirements per LTC2311-16 specifications.

What power supply configurations are validated for the DC2425A-A?

The DC2425A-A is validated for dual-supply operation: VDD = 3.3V or 5V (with corresponding 1µF ceramic bypass) and OVDD = 1.8V or 2.5V (with 1µF bypass). All supply rails meet LTC2311-16 absolute maximum ratings and recommended operating conditions. The board includes header pins for independent supply monitoring and optional nap/sleep mode control, supporting low-power validation down to 0.5μW sleep current as specified for the underlying LTC2311-16 IC.

Is the DC2425A-A compatible with high-temperature operation up to 125°C?

No - the DC2425A-A evaluation board itself is rated for commercial/industrial temperature operation (0°C to 85°C ambient), consistent with its PCB material (FR-4), passive components, and connector specifications. While the mounted LTC2311-16H variant supports –40°C to 125°C junction temperature, the board-level thermal design, solder mask, and decoupling capacitors are not qualified for sustained 125°C ambient use. For extended temperature validation, users must perform system-level thermal analysis and component derating per IPC-2221 guidelines.