Analog Devices Inc. DC2289A-B

Overview

DC2289A-B from Analog Devices (formerly Linear Technology) is a fully assembled, RoHS-compliant demonstration board for the LTC2368-24 24-bit, 1Msps pseudo-differential unipolar SAR ADC with integrated digital averaging filter. It supports VREF from 2.5V to 5.1V, delivers ±4.5ppm INL max and 98dB SNR at full speed, and enables real-time averaging from 1 to 65536 samples - used in high-precision seismology and medical imaging signal chains.

For engineers reviewing the DC2289A-B datasheet, DC2289A-B pinout, DC2289A-B application, or DC2289A-B equivalent, this board provides validated layout, reference clocking, low-noise analog front-end filtering (including 10Ω/3.3nF RC network and 47µF X7R REF decoupling), daisy-chain SPI interface verification, and thermal management for the 16-lead MSOP or DFN package of the LTC2368-24 under industrial temperature conditions.

Technical Context

The DC2289A-B implements the LTC2368-24 in its default 16-lead MSOP configuration with dedicated GND plane partitioning, precision 2.5V LDO (LT3045) for VDD, and independent OVDD rail support for 1.8V–5V logic compatibility. It integrates the recommended external components: 10µF + 0.1µF VDD/OVDD bypassing, 47µF X7R (1210) REF decoupling, and 10Ω/3.3nF anti-aliasing filter on IN+/IN–.

Board-level timing validation includes CNV-triggered acquisition with BUSY-synchronized readout, SCK up to 100MHz (10ns min period), and chain-mode daisy-chain operation using RDL/SDI and CHAIN pins - all verified per LTC2368-24's electrical characteristics across –40°C to +85°C operating range.

Key Specifications

Availability

DC2289A-B is available at Aetrix Electronics and suitable for high-precision data acquisition, seismic sensor conditioning, and medical imaging subsystem development requiring stable component supply, traceable evaluation hardware, and documented performance validation.

Supply support for DC2289A-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 semiconductors, serving industrial, automotive, communications, and healthcare markets.

The DC2289A-B belongs to Analog Devices' Linear Technology legacy evaluation board portfolio, designed specifically to accelerate prototyping and validation of ultra-high-resolution SAR ADCs in noise-sensitive, low-power, wide-dynamic-range applications.

FAQ

What is the primary function of the DC2289A-B evaluation board?

The DC2289A-B evaluation board is a ready-to-use hardware platform for evaluating the LTC2368-24 24-bit SAR ADC. It provides complete signal chain implementation - including precision voltage regulation, analog input filtering, reference decoupling, and SPI interface routing - enabling immediate characterization of DC2289A-B's supported device under real-world conditions without custom PCB design.

Does the DC2289A-B support both MSOP and DFN packages of the LTC2368-24?

Yes, the DC2289A-B board features dual footprints compatible with both the 16-lead MSOP (e.g., LTC2368CMS-24) and 4mm × 3mm DFN (e.g., LTC2368CDE-24) variants of the LTC2368-24. The layout maintains identical analog grounding, power delivery, and signal integrity for either package, as confirmed by Linear Technology's DC2289A-B user guide and schematic.

Can the DC2289A-B be used to validate daisy-chain SPI operation of the LTC2368-24?

Yes, the DC2289A-B includes hardware support for daisy-chain mode: the CHAIN pin (Pin 1) is routed to a jumper option, and RDL/SDI (Pin 12) is accessible for cascading multiple LTC2368-24 devices. Timing compliance with tSCKCH = 13.5ns minimum and SDO-to-SCK setup/hold requirements has been verified per the LTC2368-24 datasheet.

What reference voltage configuration does the DC2289A-B use for the LTC2368-24?

The DC2289A-B provides an external VREF input connector supporting 2.5V to 5.1V, with onboard provision for the recommended 47µF X7R ceramic capacitor (1210 size, 10V rating) placed directly at REF pins 7 and 8. No internal reference is generated - VREF must be supplied externally, matching the LTC2368-24's specified operating range.

Is thermal management implemented on the DC2289A-B for extended industrial operation?

Yes, the DC2289A-B incorporates thermal design aligned with LTC2368-24's specifications: exposed-pad DFN variants connect the GND pad (Pin 17) to a large internal ground plane, and the MSOP variant uses multi-layer copper pours with thermal vias. Board-level testing confirms stable operation from –40°C to +85°C, consistent with the LTC2368IMS-24 and LTC2368IDE-24 temperature grades.