Analog Devices Inc. DC2365A-C

Overview

DC2365A-C from Analog Devices is a demonstration board for the LTC2353-18 - a buffered dual 18-bit, 550ksps/channel simultaneous-sampling SAR ADC with ±10.24V differential inputs, 30V_P-P common-mode range, and integrated 4.096V reference buffer. It supports pin-selectable CMOS (1.8V–5V) or LVDS serial interfaces and enables per-channel SoftSpan configuration (±10.24V, 0–10.24V, ±5.12V, 0–5.12V) for high-voltage industrial data acquisition.

For engineers reviewing the DC2365A-C datasheet, DC2365A-C pinout, DC2365A-C application, or DC2365A-C equivalent, this board provides validated hardware for evaluating the LTC2353-18's rail-to-rail input overdrive tolerance, 124dB CMRR at 200Hz, ±3.5LSB INL (±10.24V range), 96.4dB SNR, and low 500pA input leakage at 85°C - critical for precision power line monitoring and PLC analog input module design.

Technical Context

The DC2365A-C implements the LTC2353-18 in a fully populated 48-lead LQFP (7mm × 7mm) layout with optimized analog signal routing, separate analog/digital ground planes, and decoupling per supply rail (VCC/VEE/VDD/OVDD). It integrates the required 47μF REFBUF bypass capacitor and 0.1μF REFIN capacitor to support stable wake-up timing (200ms) and minimize reference noise.

This board exposes all LTC2353-18 digital I/Os (CS, CNV, BUSY, SDO0/SDO1, SCKO/SCKI, PD) via 0.1"-spaced headers and includes jumpers for CMOS/LVDS mode selection, VREFBUF overdrive enable, and channel disable - enabling direct interface to FPGA or microcontroller SPI peripherals without level-shifting or external clock generation.

Key Specifications

Availability

DC2365A-C is available at Aetrix Electronics and suitable for industrial process control, power line monitoring, and test & measurement applications requiring stable component supply, traceable evaluation hardware, and fast-turn prototyping of high-resolution analog front-ends.

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

The DC2365A-C belongs to ADI's Linear Technology legacy evaluation board family, specifically designed to accelerate validation of high-voltage, high-accuracy SAR ADCs like the LTC2353-18 in demanding industrial sensing and energy metering systems.

FAQ

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

The DC2365A-C evaluation board is a fully assembled hardware platform for evaluating the LTC2353-18 dual 18-bit SAR ADC. It provides immediate access to all analog inputs (IN0±, IN1±), digital interfaces (CMOS/LVDS), and reference circuitry - enabling rapid characterization of DC2365A-C performance metrics including SNR (96.4dB), INL (±3.5LSB), and CMRR (124dB) under real-world signal conditions.

Does the DC2365A-C support both CMOS and LVDS digital interfaces out of the box?

Yes, the DC2365A-C supports both interfaces via onboard jumpers. Selecting CMOS mode configures SDO0/SDO1, SCKO, and SCKI for 1.8V–5V logic levels; LVDS mode enables differential signaling with internal 100Ω termination. The board's layout maintains controlled impedance and separation between analog and digital sections to preserve DC2365A-C signal integrity in either mode.

Can the DC2365A-C be used to evaluate the LTC2353-18's SoftSpan input range flexibility?

Yes, the DC2365A-C allows full evaluation of SoftSpan functionality. Jumpers and register settings let users configure each channel independently for ±10.24V, 0–10.24V, ±5.12V, or 0–5.12V ranges - directly validating the LTC2353-18's ability to digitize diverse industrial signals (e.g., ±10V sensor outputs or 0–5V thermocouple amplifiers) without external signal conditioning on the DC2365A-C board.

What power supply requirements must be met to operate the DC2365A-C with the LTC2353-18 at full specification?

To operate the DC2365A-C at full spec, supply VCC = +15V, VEE = –15V (enabling ±10.24V input range), VDD = 5V, and OVDD = 2.5V (for CMOS mode) or 3.3V (for LVDS mode). The DC2365A-C board includes screw terminals and filtering for these rails; proper sequencing (VDD before VCC/VEE) ensures reliable startup and avoids latch-up per LTC2353-18 absolute maximum ratings.

Is the DC2365A-C compatible with standard microcontroller development environments?

Yes, the DC2365A-C exposes all LTC2353-18 digital control lines (CS, CNV, BUSY, SDO0/SDO1, SCKO/SCKI) on 0.1"-spaced headers compatible with Arduino, Raspberry Pi Pico, and FPGA carrier boards. Example firmware and SPI timing diagrams are provided in the DC2365A-C user guide, enabling direct integration into existing MCU-based data acquisition stacks without custom adapter hardware.