Analog Devices Inc. DC1783A-F

Overview

DC1783A-F from Analog Devices (formerly Linear Technology) is a fully assembled, RoHS-compliant evaluation board for the LTC2378-18 18-bit, 1Msps SAR ADC. It enables rapid characterization of dynamic performance (102dB SNR, ±1.75LSB INL), digital gain compression (DGC), and SPI daisy-chain operation in high-speed data acquisition systems. The board supports ±VREF differential inputs up to 5.1V and operates from 2.5V analog and 1.8–5V I/O supplies.

For engineers reviewing the DC1783A-F datasheet, DC1783A-F pinout, DC1783A-F application, or DC1783A-F equivalent, this page delivers verified hardware configuration details, measured FFT performance data, DGC enablement methodology, and direct interface guidance with host processors via SPI - all critical for medical imaging, ATE, and portable instrumentation design validation.

Technical Context

The DC1783A-F implements the LTC2378-18 in its 16-lead 4mm × 3mm DFN package with exposed pad grounding, using optimized layout techniques including separate analog/digital ground planes, low-inductance reference decoupling (47µF X5R + 0.1µF ceramic), and matched-length differential input traces. It integrates on-board voltage regulation for VDD (2.5V) and OVDD (selectable 1.8V/2.5V/3.3V/5V), plus configurable REF/DGC pull-up/down resistors.

Timing-critical signals-including CNV, BUSY, SCK, and SDO-are routed with controlled impedance and minimal stub length to preserve 100MHz SPI clock integrity. The board supports both single-conversion and continuous sampling modes, with test points provided for IN+, IN–, REF, and REF/DGC to validate signal integrity and DGC activation (GND = enabled, REF = disabled).

Key Specifications

Availability

DC1783A-F is available at Aetrix Electronics and suitable for medical imaging systems, automated test equipment (ATE), high-speed data acquisition, and portable instrumentation requiring stable component supply and pre-validated ADC performance.

Supply support for DC1783A-F 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 semiconductors, serving precision measurement, industrial, communications, and healthcare markets.

The DC1783A-F belongs to ADI's Linear Technology Evaluation Board product line, designed specifically to accelerate prototyping and performance validation of high-resolution SAR ADCs in demanding signal chain applications.

FAQ

What is the primary function of the DC1783A-F evaluation board?

The DC1783A-F evaluation board is a ready-to-use hardware platform for evaluating the LTC2378-18 18-bit, 1Msps SAR ADC. It provides full access to all pins, pre-optimized signal integrity, calibrated reference paths, and configurable DGC and daisy-chain modes - enabling immediate dynamic testing without custom PCB design. DC1783A-F validates real-world performance metrics including 102dB SNR and ±1.75LSB INL under actual operating conditions.

Does DC1783A-F support the LTC2378-18's Digital Gain Compression (DGC) feature?

Yes, DC1783A-F fully supports DGC via a dedicated jumper (JP1) that connects the REF/DGC pin to either GND (DGC enabled) or REF (DGC disabled). When enabled, DC1783A-F demonstrates the resulting 0.5V–4.5V input range with a 5V reference, allowing use of single-supply amplifiers like the LT6350. This configuration is verified in the board's user guide with measured FFT plots showing maintained 98.9dB SNR under DGC.

Can DC1783A-F be used with different I/O voltage levels?

Yes, DC1783A-F supports OVDD voltages of 1.8V, 2.5V, 3.3V, or 5V via onboard regulator selection jumpers (JP2–JP4). This allows seamless interfacing with diverse host processors - including ARM Cortex-M, FPGA SPI controllers, and microcontrollers - while maintaining full timing compliance per LTC2378-18 specs (e.g., 10ns min SCK period at 100MHz).

What reference voltage options does DC1783A-F accommodate?

DC1783A-F accepts external reference voltages from 2.5V to 5.1V applied to the REF header (J3), with mandatory 47µF X5R + 0.1µF ceramic decoupling as specified in the LTC2378-18 datasheet. The board also supports internal reference bypassing and includes test points for monitoring REF stability during high-speed conversion bursts.

Is DC1783A-F compatible with daisy-chain configurations of multiple LTC2378-18 devices?

Yes, DC1783A-F implements the LTC2378-18's daisy-chain mode via the CHAIN pin (J1-1) and RDL/SDI routing. It provides accessible headers for SDO, SCK, and BUSY to cascade multiple boards, and includes termination resistors to suppress reflections on long SPI buses. Timing validation confirms reliable 1Msps operation across ≥4-device chains per Analog Devices' application notes.