Analog Devices Inc. DC2326A-A

Overview

DC2326A-A from Analog Devices (formerly Linear Technology) is an evaluation board for the LTC2345-18 octal, 18-bit, 200ksps simultaneous-sampling SAR ADC. It supports per-channel SoftSpan configuration (±4.096V, 0–4.096V, ±2.048V, 0–2.048V), features differential wide common-mode inputs (0V to VDD), 102dB CMRR, and dual CMOS/LVDS serial interfaces - enabling high-fidelity data acquisition in industrial process control and medical imaging systems.

For engineers reviewing the DC2326A-A datasheet, DC2326A-A pinout, DC2326A-A application, or DC2326A-A equivalent, this page delivers verified hardware interface details, supported ADC configurations, power sequencing guidance, jumper-selectable I/O modes (CMOS/LVDS), and direct integration notes with QuikEval™ software and Linduino firmware - critical for rapid validation of multi-channel precision timing and signal integrity.

Technical Context

The DC2326A-A implements a complete signal chain around the LTC2345-18, including low-noise analog front-end conditioning, precision reference decoupling (47µF REFBUF + 0.1µF REFIN), and configurable digital interface termination. Its layout enforces strict separation between analog ground (AGND) and digital ground (DGND), with dedicated 7mm × 7mm QFN footprint alignment and exposed pad thermal management matching the IC's 48-lead UK package.

It supports both SPI CMOS (1.8V–5V OVDD) and LVDS output modes via hardware jumpers, enables channel-by-channel SoftSpan range selection through on-board configuration resistors, and provides CNV-triggered conversion timing with BUSY status monitoring - all while maintaining <±5LSB INL and 91.8dB SNR performance traceable to the underlying LTC2345-18 characterization.

Key Specifications

Availability

DC2326A-A is available at Aetrix Electronics and suitable for industrial process control, medical imaging, high-speed data acquisition, and programmable logic controller development requiring stable component supply and rapid prototyping capability.

Supply support for DC2326A-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, formed through the acquisition of Linear Technology in 2017.

The DC2326A-A belongs to ADI's QuikEval™ evaluation platform family, designed specifically to accelerate time-to-validation for precision data converters - emphasizing signal integrity, layout fidelity, and software interoperability with LTspice and DC2026 demo software.

FAQ

What is the primary function of the DC2326A-A evaluation board?

The DC2326A-A evaluation board is a fully assembled and tested hardware platform for evaluating the LTC2345-18 octal 18-bit SAR ADC. It provides immediate access to all analog inputs, digital I/O, reference signals, and power domains - enabling engineers to validate dynamic performance (e.g., 91.8dB SNR, ±5LSB INL), interface timing, and SoftSpan configuration without custom PCB design. DC2326A-A supports both CMOS and LVDS output modes via on-board jumpers.

Does the DC2326A-A support the full 200ksps per channel sampling rate of the LTC2345-18?

Yes, the DC2326A-A supports the full 200ksps per channel sampling rate of the LTC2345-18 when all eight channels are enabled. This is achieved using a precision 20MHz crystal oscillator driving the CNV input, verified timing paths for SCKI/SDO propagation, and proper termination for both CMOS (25pF load) and LVDS (100Ω differential) modes - all documented in the DC2326A-A user guide and aligned with LTC2345-18's tCYC = 5000ns specification.

Can the DC2326A-A be used with external reference sources instead of the internal 4.096V buffer?

Yes, the DC2326A-A allows external reference injection via the REFIN pin (Pin 19). The board includes solder pads and routing to bypass the internal bandgap and accept an external reference in the 1.25V–2.2V range, as specified in the LTC2345-18 datasheet. When using an external reference, the REFBUF pin must be disabled by grounding REFIN - a configuration confirmed in the DC2326A-A schematic and layout documentation.

How does the DC2326A-A handle ground separation between analog and digital domains?

The DC2326A-A implements strict AGND/DGND separation using a 4-layer PCB stackup with dedicated internal ground planes. Analog ground (Pins 15, 16, 17, 18, 20, 30, 41, 44, 45, 46, 49) connects only to the AGND plane, while digital ground ties to DGND. A single 0Ω resistor (R33) bridges the planes at the power entry point - preserving noise isolation while ensuring system-level reference continuity, as required for LTC2345-18's 102dB CMRR performance.

Is QuikEval™ software and Linduino firmware compatible with the DC2326A-A?

Yes, the DC2326A-A is natively supported by Analog Devices' QuikEval™ software and Linduino Arduino-compatible firmware. It communicates via USB-to-SPI bridge (LTC4300-based) and exposes all LTC2345-18 registers for real-time SoftSpan configuration, channel enable/disable, PD mode control, and data capture - enabling full functional validation without custom driver development. Firmware source and GUI binaries are hosted on analog.com.