Analog Devices Inc. DC2425A-C

Overview

DC2425A-C from Analog Devices (formerly Linear Technology) is a fully assembled, RoHS-compliant evaluation board for the LTC2311-14 14-bit + sign differential SAR ADC. It enables rapid characterization of key performance metrics-including 5Msps throughput, ±0.75LSB typical INL, 80dB SNR at 2.2MHz, and 8VP-P differential input range-under real-world PCB layout and power delivery conditions. Designed for high-speed data acquisition systems requiring wide dynamic range and high common-mode rejection, it supports both CMOS and LVDS serial interface modes.

For engineers reviewing the DC2425A-C datasheet, DC2425A-C pinout, DC2425A-C application, or DC2425A-C equivalent, this page delivers verified hardware configuration details, measured performance benchmarks, supported interface modes (CMOS/LVDS), onboard reference management (4.096V internal / 1.25V external), and thermal/power behavior across –40°C to 125°C operation.

Technical Context

The DC2425A-C implements the LTC2311-14 in a 16-lead MSOP package with exposed pad grounding, using optimized analog routing, dedicated 10µF X5R ceramic decoupling on REFIN/REFOUT, and low-inductance 1µF VDD/OVDD bypassing. It supports dual I/O modes via CMOS/LVDS pin strapping and includes configurable termination for LVDS clock/data lines.

Board-level design incorporates precision 25Ω series resistors and 47pF capacitors on AIN+ and AIN– to match the LTC2311-14's input impedance model and minimize sampling transient errors. The layout separates analog, digital, and power domains while maintaining controlled-impedance SCK/SDO traces for reliable 105MHz CMOS or 100Ω-differential LVDS timing compliance.

Key Specifications

Availability

DC2425A-C is available at Aetrix Electronics and suitable for high-speed data acquisition systems, optical networking signal conditioning, and multiphase motor control applications requiring stable component supply, traceable sourcing, and long-term lifecycle support.

Supply support for DC2425A-C 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 technologies for precision measurement and high-speed conversion.

The DC2425A-C belongs to Analog Devices' LTC evaluation board family, engineered specifically to accelerate prototyping and validation of high-resolution, high-throughput SAR ADCs in demanding industrial, automotive, and communications applications.

FAQ

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

The DC2425A-C evaluation board is designed exclusively to demonstrate and validate the performance of the LTC2311-14 14-bit + sign differential SAR ADC. It provides all necessary power regulation, reference buffering, signal conditioning, and interface circuitry-including configurable CMOS/LVDS I/O-to enable accurate measurement of key parameters such as SNR, THD, INL, DNL, and timing behavior under real-world operating conditions. DC2425A-C does not contain additional processors or firmware.

Does the DC2425A-C support both CMOS and LVDS interface modes for the LTC2311-14?

Yes, the DC2425A-C supports both interface modes via hardware configuration. The CMOS/LVDS pin (Pin 10 of the LTC2311-14) is routed to a solder jumper: grounding it selects CMOS mode (1.8V–2.5V OVDD logic), connecting it to OVDD selects standard LVDS mode, and leaving it floating enables low-power LVDS mode. The board includes 100Ω differential termination networks for SCK and SDO in LVDS mode, and proper single-ended routing for CMOS operation.

How is the internal reference configured on the DC2425A-C, and can an external reference be used?

The DC2425A-C defaults to the LTC2311-14's internal 4.096V temperature-compensated reference (REFOUT), decoupled with a 10µF X5R ceramic capacitor. An external 1.25V reference may be applied to the REFIN pin; doing so disables the internal REFOUT buffer, allowing the external source to drive REFOUT directly within 1.25V to VDD. The board provides test points and routing access to both REFIN and REFOUT for flexible reference validation.

What analog input configurations does the DC2425A-C support for the LTC2311-14?

The DC2425A-C supports all three operational modes of the LTC2311-14: fully differential (±4.096V span), pseudo-differential bipolar (±2.048V span), and pseudo-differential unipolar (0–4.096V span). Its AIN+ and AIN– inputs are terminated with matched 25Ω series resistors and 47pF capacitors to preserve bandwidth and minimize settling error. No jumpers or configuration registers are required-the ADC automatically adapts based on input voltage relationships.

Is the DC2425A-C compatible with the full industrial temperature range of the LTC2311-14?

Yes, the DC2425A-C is built with components rated for –40°C to 125°C operation and has been validated to maintain specified LTC2311-14 performance across that full range. It uses the LTC2311HMSE-14 variant (H-grade), and its PCB layout, decoupling strategy, and thermal relief design ensure stable reference output, consistent timing margins, and reliable LVDS/CMOS signaling even at temperature extremes.