Analog Devices Inc. DC2365A-B

Overview

DC2365A-B from Analog Devices is an evaluation board for the LTC2357-18 - a buffered quad 18-bit, 350ksps/channel simultaneous-sampling SAR ADC with ±10.24V differential inputs, 30V_P-P common-mode range, and SoftSpan™ per-channel input range selection. It enables high-precision digitization of industrial voltage signals in PLCs, power monitoring, and test equipment.

For engineers reviewing the DC2365A-B datasheet, DC2365A-B pinout, DC2365A-B application, or DC2365A-B equivalent, this board provides verified hardware reference design, SPI/LVDS interface validation, full-speed timing characterization, and direct connection to the LTC2357-18's picoamp-input buffers and integrated 4.096V reference buffer - critical for evaluating rail-to-rail overdrive tolerance and 128dB CMRR in real-world signal chains.

Technical Context

The DC2365A-B implements the complete analog front-end and digital interface for the LTC2357-18, including precision ±15V analog supply conditioning, 47µF/0.1µF REFBUF/REFIN decoupling, LVDS/CMOS I/O termination networks, and configurable CNV/CS timing control. It supports all four SoftSpan input ranges (±10.24V, 0–10.24V, ±5.12V, 0–5.12V) via on-board jumpers and delivers validated 96.4dB SNR and −110dB THD at 2kHz under true bipolar drive.

Designed for functional verification of simultaneous sampling across four channels, the board routes each IN+/IN− pair with matched-length 50Ω-controlled impedance traces, integrates GND plane segmentation to isolate analog/digital domains, and provides test points for VCC, VEE, VDD, OVDD, and all 48 LQFP pins - enabling accurate measurement of acquisition time (625–835ns), aperture jitter (3ps_RMS), and channel-to-channel crosstalk (−109dB).

Key Specifications

Availability

DC2365A-B is available at Aetrix Electronics and suitable for industrial process control, power line monitoring, and automated test equipment requiring stable component supply, rapid prototyping validation, and production-ready reference design fidelity.

Supply support for DC2365A-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 (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.

The DC2365A-B belongs to ADI's Linear Technology evaluation board family, engineered to accelerate development of precision data acquisition systems using their high-resolution SAR ADCs - specifically targeting applications demanding simultaneous sampling, wide dynamic range, and robust noise immunity.

FAQ

What is the primary function of the DC2365A-B evaluation board?

The DC2365A-B evaluation board is designed exclusively to demonstrate and validate the performance of the LTC2357-18 18-bit quad SAR ADC. It provides a fully populated, tested hardware platform with calibrated analog front-end circuitry, configurable digital interfaces (CMOS/LVDS), and precise power delivery - enabling engineers to evaluate DC2365A-B's simultaneous sampling accuracy, SoftSpan range flexibility, and 96.4dB SNR in real system conditions before integration.

Does the DC2365A-B support both CMOS and LVDS digital interfaces for the LTC2357-18?

Yes, the DC2365A-B supports both interfaces via on-board jumpers and termination networks. It implements full LVDS differential signaling with 100Ω termination and common-mode biasing, as well as CMOS-level I/O compatible with 1.8V to 5V OVDD. The board validates timing parameters for both modes - including tSCKI (10ns min for CMOS, 4ns min for LVDS) and SDO-to-SCKO skew (±1ns) - ensuring reliable operation of the DC2365A-B across interface configurations.

Can the DC2365A-B be used to evaluate the LTC2357-18's SoftSpan™ input range configuration?

Yes, the DC2365A-B includes dedicated header jumpers and configuration resistors that allow hardware-selectable SoftSpan ranges for each channel: ±10.24V, 0–10.24V, ±5.12V, and 0–5.12V. These settings directly control the LTC2357-18's internal range registers via GPIO-compatible signals, enabling functional verification of per-channel range switching - a core capability confirmed in DC2365A-B's schematic and user guide.

What power supplies are required to operate the DC2365A-B with the LTC2357-18?

The DC2365A-B requires three isolated DC supplies: ±15V for analog rails (VCC/VEE), +5V for core logic (VDD), and +2.5V for digital I/O (OVDD). It also conditions the internal 4.096V reference buffer (REFBUF) using a 47µF tantalum and 0.1µF ceramic capacitor network. All supplies are monitored and filtered on-board to meet the stringent PSRR (>100dB below 10kHz) and noise requirements of the DC2365A-B's target ADC.

Is the DC2365A-B compatible with standard Arduino or Raspberry Pi microcontrollers for control and data capture?

No, the DC2365A-B is not natively compatible with Arduino or Raspberry Pi. It features a 20-pin IDC header for connection to ADI's DC2026C controller board (or similar USB-based interface), which handles SPI/LVDS protocol translation, timing generation (CNV, CS), and data streaming. Direct interfacing with generic microcontrollers would require custom firmware to replicate the precise timing sequences (e.g., tCNVH = 40ns, tBUSYLH = 30ns) specified for the DC2365A-B's LTC2357-18 interface.