Analog Devices Inc. DC2365A-G

Overview

DC2365A-G 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-G datasheet, DC2365A-G pinout, DC2365A-G application, or DC2365A-G 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 (max), 96.4dB SNR, and low 500pA input leakage at 85°C - critical for precision power line monitoring and PLC analog input modules.

Technical Context

The DC2365A-G implements the LTC2353-18 in a fully populated 48-lead LQFP (7mm × 7mm) layout with matched analog routing, dedicated low-noise power regulation (±15V, 5V, OVDD), and configurable termination for both CMOS and LVDS I/O modes. It integrates decoupling networks per supply rail (including VDDLBYP bypassed with 2.2µF ceramic) and supports true bipolar, fully differential, and unipolar input drive topologies via jumper-selectable front-end configurations.

Board-level design enforces strict separation between analog input paths (IN0±/IN1±), digital I/O (SDO0/SDO1/SCKI/CS/BUSY), and reference circuitry (REFIN/REFBUF), preserving the LTC2353-18's 162mW typical power dissipation and 450ns conversion time per channel. The CNV timing interface is routed to accommodate precise sampling synchronization across dual channels without inter-channel skew.

Key Specifications

Availability

DC2365A-G is available at Aetrix Electronics and suitable for industrial process control, power line monitoring, and test and measurement applications requiring stable component supply, traceable evaluation hardware, and full signal-chain validation support.

Supply support for DC2365A-G 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-G belongs to ADI's Linear Technology legacy evaluation board portfolio, specifically designed to accelerate adoption of precision high-voltage ADCs like the LTC2353-18 in demanding real-world systems where wide common-mode range, low leakage, and simultaneous sampling are mandatory.

FAQ

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

The DC2365A-G evaluation board is a fully assembled and tested hardware platform for characterizing and prototyping with the LTC2353-18 dual 18-bit SAR ADC. It provides accessible test points, configurable jumpers for input range and interface mode selection, and optimized PCB layout to preserve the IC's specified 96.4dB SNR and 124dB CMRR - enabling rapid validation of high-accuracy analog input designs before custom board spin.

Does the DC2365A-G support both CMOS and LVDS digital interfaces for the LTC2353-18?

Yes, the DC2365A-G supports both interfaces via hardware configuration. Jumpers JP1–JP4 select between CMOS (1.8V–5V OVDD) and LVDS modes, and onboard terminations match the respective signaling standards. The board routes SDO0/SDO1, SCKI, CS, BUSY, and CNV signals with controlled impedance and length matching to maintain timing integrity at up to 100MHz CMOS clock rates or 250Mbps LVDS data rates - as verified in the LTC2353-18's timing specs.

Can the DC2365A-G evaluate the LTC2353-18's ±10.24V input range with true bipolar drive?

Yes, the DC2365A-G supports true bipolar drive (IN– = 0V) for the ±10.24V SoftSpan range. Its front-end uses precision-matched resistive dividers and low-leakage op-amp buffers to condition external signals while maintaining the LTC2353-18's specified ±3.5LSB INL and 500pA input leakage at 85°C. Jumper JP5 configures the input topology, and test points TP1–TP4 allow direct probing of IN0+/IN0– and IN1+/IN1– nodes under full-scale differential excitation.

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

To achieve full 550ksps/channel operation and specified dynamic performance, the DC2365A-G requires three isolated supplies: VCC = +15V (7.5–38V), VEE = –15V (–16.5–0V), and VDD = 5V (4.75–5.25V). OVDD must be set to 2.5V for CMOS mode or 2.375–5.25V for LVDS. The board includes on-board regulators and filtering to meet the LTC2353-18's 162mW typical power dissipation and <3ps RMS aperture jitter requirements.

Is the DC2365A-G compatible with standard Arduino or Raspberry Pi microcontrollers for quick system integration?

No, the DC2365A-G is not directly compatible with Arduino or Raspberry Pi. It is a standalone evaluation platform with a 2×25-pin header (P1/P2) exposing the LTC2353-18's native SPI-compatible digital interface (CS, SCKI, SDO0, SDO1, BUSY, CNV), requiring a host controller capable of generating precise CNV pulses and handling high-speed serial data. ADI provides Linduino firmware and PC-based GUI software (via USB-to-SPI adapter) for out-of-box evaluation - not plug-and-play with hobbyist platforms.