Analog Devices Inc. DC2581A-B

Overview

DC2581A-B from Analog Devices (formerly Linear Technology) is a fully populated, ready-to-use demonstration board for the LTC2341-16 dual 16-bit simultaneous-sampling SAR ADC. It supports ±4.096V/0–4.096V/±2.048V/0–2.048V SoftSpan input ranges, delivers 93.4dB SNR and ±1.25LSB INL at 666ksps per channel, and enables rapid evaluation of high-precision industrial data acquisition systems.

For engineers reviewing the DC2581A-B datasheet, DC2581A-B pinout, DC2581A-B application, or DC2581A-B equivalent, this board provides validated LVDS/CMOS interface operation, on-board reference buffering (4.096V), differential analog signal conditioning, and configurable power-down sequencing - all critical for evaluating high-speed, wide-dynamic-range ADC performance in PLC and medical imaging signal chains.

Technical Context

The DC2581A-B implements the LTC2341-16 in its native 32-lead 5mm × 5mm QFN package with full signal integrity support: matched-length LVDS traces, low-noise 47μF REFBUF and 0.1μF REFIN bypassing, and isolated analog/digital ground planes. It routes all 32 pins to test points and headers, including dedicated SDO0/SDO1, SCKO+/SCKO−, and CNV/BUSY signals for timing-critical validation.

It supports both CMOS (1.8V–5V) and LVDS digital I/O modes via the LVDS/CMOS pin (Pin 14), accommodates external reference injection at REFIN (1.25V–2.2V) or REFBUF (2.5V–5V), and integrates thermal management for continuous operation up to +125°C ambient - matching the H-grade LTC2341HUH-16 specification.

Key Specifications

Availability

DC2581A-B is available at Aetrix Electronics and suitable for industrial process control, medical imaging equipment, and high-speed data acquisition systems requiring stable component supply and pre-validated ADC evaluation platforms.

Supply support for DC2581A-B 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.

The DC2581A-B belongs to Analog Devices' precision data converter evaluation platform family, designed specifically to accelerate prototyping and validation of high-resolution, multi-channel SAR ADCs in demanding industrial and medical applications.

FAQ

What is the primary function of the DC2581A-B evaluation board?

The DC2581A-B evaluation board is a complete hardware platform for evaluating the LTC2341-16 dual 16-bit simultaneous-sampling SAR ADC. It provides all necessary signal conditioning, reference buffering, digital interface routing (LVDS/CMOS), and power management to validate real-world performance - including SNR, INL, THD, and crosstalk - without custom PCB design. DC2581A-B enables immediate functional and timing verification of the LTC2341-16 in industrial and medical data acquisition use cases.

Does DC2581A-B support both LVDS and CMOS digital interfaces out of the box?

Yes, DC2581A-B supports both LVDS and CMOS interfaces via hardware configuration: the LVDS/CMOS select pin (Pin 14 of the LTC2341-16) is routed to a jumper header, allowing users to tie it to OVDD (LVDS mode) or GND (CMOS mode). The board includes proper termination (100Ω differential for LVDS; 25pF load for CMOS) and matches trace lengths for signal integrity - enabling direct oscilloscope or FPGA interface validation for either mode without modification. DC2581A-B's layout fully complies with timing specs for both interfaces as defined in the LTC2341-16 datasheet.

Can DC2581A-B be used to evaluate external reference configurations?

Yes, DC2581A-B supports external reference injection at both REFIN (1.25V–2.2V) and REFBUF (2.5V–5V) pins. The board includes solder jumpers to disconnect the internal bandgap and buffer, allowing precise external references to drive the LTC2341-16's reference system. This enables evaluation of system-level accuracy, temperature drift, and noise contribution when using ultra-stable external references - critical for metrology and calibration-grade applications. DC2581A-B maintains full signal chain integrity during such tests, preserving the specified ±1.25LSB INL and 93.4dB SNR performance.

What analog input topologies does DC2581A-B accommodate?

DC2581A-B supports fully differential, bipolar, unipolar, and arbitrary common-mode drive topologies via its dual-channel differential input structure (IN0±, IN1±). The board's front-end allows direct connection of transformers, instrumentation amplifiers, or resistor networks to implement any SoftSpan range (±4.096V, 0–4.096V, ±2.048V, 0–2.048V) while maintaining >105dB CMRR. Its wide 0V–5V input common mode range and rail-to-rail overdrive tolerance let users validate sensor interface designs - including strain gauge bridges and isolated current shunts - without level-shifting circuitry. DC2581A-B preserves the LTC2341-16's specified 22MHz –3dB bandwidth and 150ps aperture delay matching across channels.

Is DC2581A-B compatible with high-temperature operation up to 125°C?

Yes, DC2581A-B is designed to operate continuously at ambient temperatures up to +125°C, matching the LTC2341HUH-16 H-grade specification. It uses high-temperature-rated capacitors (X7R, 125°C rated), thick copper ground planes for thermal dissipation, and a layout that minimizes thermal gradients across the LTC2341-16 QFN package. All critical components - including the 47μF REFBUF bypass capacitor and 0.1μF REFIN filter - are qualified for 125°C operation. DC2581A-B maintains full functionality and meets datasheet specifications (e.g., ±1.25LSB INL, 93.4dB SNR) across the full industrial temperature range when paired with an H-grade LTC2341HUH-16 device.