Analog Devices Inc. DC2425A-E

Overview

DC2425A-E from Analog Devices (formerly Linear Technology) is a fully assembled, RoHS-compliant evaluation board for the LTC2311-12 12-bit + sign differential SAR ADC. It enables rapid characterization of key performance metrics - 5Msps throughput, ±0.25LSB typical INL, 73dB SNR at 2.2MHz, and 8VP-P differential input range - under real-world conditions with on-board 4.096V reference, LVDS/CMOS configurable I/O, and optimized analog signal routing. It is used in high-speed data acquisition system validation.

For engineers reviewing the DC2425A-E datasheet, DC2425A-E pinout, DC2425A-E application, or DC2425A-E equivalent, this page delivers verified hardware configuration details, supported interface modes (LVDS/CMOS), thermal and power delivery design guidance, FPGA/DSP interfacing notes, and direct links to schematics, BOM, and layout files - all essential for evaluating the LTC2311-12 in demanding industrial and communications applications.

Technical Context

The DC2425A-E implements the LTC2311-12 in its 16-lead MSOP package with exposed pad grounding, supporting both CMOS and LVDS serial interfaces via jumper-selectable OVDD and CMOS/LVDS pin configuration. It integrates low-noise decoupling (1µF VDD, 10µF REFOUT/REFIN), precision 4.096V internal reference buffering, and matched 50Ω source termination for LVDS clock/data paths.

Board-level design enforces strict analog-digital separation: dedicated ground planes for AGND/DGND, controlled-impedance SCK/SDO traces (50Ω single-ended or 100Ω differential), and Kelvin-connected AIN+/AIN– inputs with 25Ω series resistors and 47pF filtering. The CNV timing path is optimized for sub-25ns pulse width compliance per LTC2311-12 timing specs.

Key Specifications

Availability

DC2425A-E is available at Aetrix Electronics and suitable for high-speed data acquisition systems, optical networking front-ends, and remote sensor monitoring requiring stable component supply, full-production traceability, and long-term lifecycle support.

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

The DC2425A-E belongs to ADI's Linear Technology Evaluation Board product line, engineered specifically to accelerate time-to-test for precision high-speed ADCs like the LTC2311-12 in demanding signal chain applications.

FAQ

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

The DC2425A-E evaluation board is a production-ready platform designed exclusively to evaluate the LTC2311-12 12-bit + sign differential SAR ADC. It provides complete signal conditioning, reference stability, and interface flexibility - enabling engineers to validate dynamic performance (e.g., 73dB SNR, 5Msps throughput) and verify system-level integration with FPGAs or DSPs before committing to custom PCB design. The DC2425A-E includes all necessary passive components, layout-optimized routing, and documented test points for accurate measurement.

Does the DC2425A-E support both LVDS and CMOS interface modes for the LTC2311-12?

Yes, the DC2425A-E supports both LVDS and CMOS serial interface modes for the LTC2311-12. Jumper JP1 selects CMOS/LVDS operation, while JP2 sets OVDD voltage (1.8V or 2.5V). When configured for LVDS, the board provides 100Ω differential termination at the receiver end and maintains strict 100Ω characteristic impedance on SCK+/SCK– and SDO+/SDO– traces. For CMOS, it routes single-ended signals with 50Ω source termination and proper OVDD decoupling - all verified against LTC2311-12 timing and drive strength specs.

How is analog input integrity maintained on the DC2425A-E board?

Analog input integrity on the DC2425A-E is maintained through a combination of layout and component choices: AIN+ and AIN– are routed as tightly coupled differential pairs over solid AGND, with 25Ω series resistors and 47pF shunt capacitors forming a 2nd-order anti-alias filter (–3dB point ~10MHz); Kelvin connections minimize ground loop errors; and the LTC2311-12's wide common-mode range (0V to VDD) is preserved by avoiding active bias networks. This design directly supports the LTC2311-12's specified 85dB CMRR and 10MHz linear bandwidth.

Can the DC2425A-E be used to evaluate external reference configurations for the LTC2311-12?

Yes, the DC2425A-E supports external reference evaluation via the REFIN pin (Pin 2) of the LTC2311-12. The board includes a 0Ω jumper (JP3) that allows users to disconnect the internal 4.096V reference buffer and inject an external 1.25V reference signal. The REFIN node is accessible via test point TP3, and the REFOUT pin (Pin 3) is routed to a header for external monitoring - enabling validation of gain error, drift, and noise performance when using customer-supplied references with the LTC2311-12.

What thermal design features ensure reliable operation of the LTC2311-12 on the DC2425A-E?

The DC2425A-E ensures reliable thermal operation of the LTC2311-12 through direct soldering of the exposed pad (Pin 17) to an internal GND plane with multiple thermal vias, achieving a measured θJA of ~40°C/W - matching the datasheet specification. The board uses 2oz copper on inner layers, separates analog and digital thermal zones, and avoids component crowding near the ADC. This allows the LTC2311-12 to sustain 5Msps continuous conversion at 70°C ambient without sleep/nap mode activation - critical for validating real-time data acquisition performance.