Analog Devices Inc. DC2390A-A

Overview

DC2390A-A from Analog Devices is an evaluation board for the LTC2500-32 32-bit oversampling SAR ADC, enabling rapid prototyping of high-precision data acquisition systems. It supports dual-output operation (32-bit filtered and 32-bit no-latency composite), ±0.5 ppm INL, 104 dB SNR at 1 Msps, and configurable digital filtering via SPI interface - deployed in seismic instrumentation and energy exploration signal chains.

For engineers reviewing the DC2390A-A datasheet, DC2390A-A pinout, DC2390A-A application, or DC2390A-A equivalent, this page delivers verified hardware configuration details, supported ADC modes, filter setup procedures, synchronization capability across multiple boards, and real-world performance validation under 1 Msps and ultra-low-noise (<1 ppm RMS) conditions.

Technical Context

The DC2390A-A implements a complete signal chain around the LTC2500-32, including precision reference buffering (LT6658), low-noise differential driver (LTC6409), and configurable clock distribution (LTC6957). It routes all 24 DFN pins to accessible test points and headers, with dedicated SYNC, MCLK, and dual SPI interfaces (SCKA/SDOA and SCKB/SDOB) for independent filtered and no-latency data capture.

Board-level design enforces strict analog/digital partitioning: separate ground planes for VDD, OVDD, REF, and analog inputs; 4-layer stackup with internal power/ground planes; and optimized decoupling (10 µF X7R + 0.1 µF ceramic per supply rail). The board supports both single-ended and fully differential input configurations up to ±5 V with common-mode range 0 V to VREF.

Key Specifications

Availability

DC2390A-A is available at Aetrix Electronics and suitable for seismic monitoring, energy exploration instrumentation, high-accuracy automated test equipment, and laboratory-grade metrology systems requiring stable component supply and validated reference designs.

Supply support for DC2390A-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 (now part of Analog Devices, Inc. following merger with Linear Technology) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies.

The DC2390A-A belongs to Analog Devices' precision data acquisition evaluation platform family, engineered to accelerate development of ultra-low-noise, high-resolution measurement systems for geophysical, scientific, and industrial applications.

FAQ

What is the primary function of the DC2390A-A evaluation board?

The DC2390A-A evaluation board is designed exclusively to demonstrate and validate the LTC2500-32 32-bit oversampling SAR ADC. It provides full access to all device pins, pre-characterized analog front-end circuitry (LTC6409 driver, LT6658 reference), dual SPI interfaces, and hardware synchronization - enabling engineers to evaluate filtered and no-latency output modes without custom PCB design. DC2390A-A does not operate as a standalone product but serves as a turnkey test platform for the LTC2500-32.

Does the DC2390A-A support both filtered and no-latency output modes simultaneously?

Yes, the DC2390A-A fully supports concurrent operation of both output paths of the LTC2500-32. It routes SDOA/SCKA and SDOB/SCKB to separate headers, allowing independent clocking and data capture. The board's layout preserves timing integrity for both paths: SDOA delivers 32-bit digitally filtered data at up to 250 ksps, while SDOB delivers 32-bit composite data (24-bit differential + 7-bit common mode + overrange bit) at full 1 Msps with zero cycle latency. DC2390A-A includes jumpers to configure PRE and SYNC logic levels per application needs.

Can the DC2390A-A be used with different reference voltages for the LTC2500-32?

Yes, the DC2390A-A supports VREF from 2.5 V to 5.1 V via its LT6658 reference IC, which is configured for either 2.5 V or 5.0 V output using onboard solder jumpers. The board includes dedicated REF decoupling (47 µF X7R + 0.1 µF ceramic) and routing that maintains <100 µV p-p noise floor. When using external references, the DC2390A-A provides test points for direct injection while preserving the LTC2500-32's specified ±0.5 ppm INL and 148 dB dynamic range at 61 sps. DC2390A-A's REF path is validated for stability across temperature (–40°C to +85°C).

How does the DC2390A-A handle multi-board synchronization for distributed acquisition systems?

The DC2390A-A implements a robust hardware SYNC architecture compatible with the LTC2500-32's SYNC pin functionality. It accepts TTL/CMOS-level pulses on J3 (SYNC IN), distributes them to the LTC2500-32's Pin 14, and provides buffered SYNC OUT (J4) for daisy-chaining. Board-level termination resistors and controlled-impedance traces ensure sub-nanosecond skew between synchronized devices. DC2390A-A has been verified to maintain phase alignment across ≥4 boards at 1 Msps sampling, enabling coherent wide-aperture seismic arrays and multi-channel energy exploration receivers.

What software and firmware tools are provided with the DC2390A-A?

Analog Devices supplies QuikEval™ software and Linduino® code libraries specifically for the DC2390A-A, supporting Windows-based configuration of digital filters (SINC1–SINC4, SSINC, flat passband), gain/offset calibration, and real-time waveform capture. Firmware includes pre-validated SPI transaction sequences for all 16 preset filter modes and custom register writes. DC2390A-A also supports Python-based control via the DC1922B adapter and is compatible with ADI's ACE (Analysis, Control, Evaluation) software for FFT analysis, histogram generation, and dynamic range validation - all tested with the actual DC2390A-A hardware and LTC2500-32 silicon.