Analog Devices Inc. DC2290A-A

Overview

DC2290A-A from Analog Devices (formerly Linear Technology) is an evaluation board designed to demonstrate the LTC2387-18 - a low-noise, 18-bit, 15 Msps successive approximation register (SAR) analog-to-digital converter with serial LVDS interface, ±4.096 V differential input range, and internal 2.048 V reference. It enables rapid prototyping of high-speed data acquisition systems in imaging, instrumentation, and communications applications.

For engineers reviewing the DC2290A-A datasheet, DC2290A-A pinout, DC2290A-A application, or DC2290A-A equivalent, this board provides full access to the LTC2387-18's LVDS data outputs (DA/DB), DCO clock, CNV control, TWOLANES mode selection, and configurable power supplies (VDD, VDDL, OVDD), supporting both one-lane and two-lane serial output modes at 15 Msps with no pipeline latency.

Technical Context

The DC2290A-A implements the LTC2387-18 in a 32-pin 5 mm × 5 mm QFN package with exposed pad grounding, using precision layout techniques to preserve signal integrity for high-SNR operation. It incorporates dedicated 0.1 µF and 10 µF ceramic decoupling on all supply rails (VDD = 5 V, VDDL = 2.5 V, OVDD = 2.5 V) and includes matched 24.9 Ω series resistors and 82 pF capacitors on the IN+/IN– differential analog path to optimize bandwidth and settling.

Board-level features include LVDS termination (100 Ω differential), selectable single-ended or differential CNV start, jumper-configurable TWOLANES mode, TESTPAT pattern generation, and PD-controlled power-down - all aligned with the LTC2387-18's timing specifications (tCONV = 54–63 ns, tCYC = 66.6 ns minimum) and absolute maximum ratings (e.g., VDD ≤ 6 V, CLK± common-mode 0.8–1.7 V).

Key Specifications

Availability

DC2290A-A is available at Aetrix Electronics and suitable for high-speed data acquisition, medical imaging, test equipment, and communications receiver design requiring stable component supply and validated reference hardware.

Supply support for DC2290A-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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.

The DC2290A-A belongs to Analog Devices' precision high-speed ADC evaluation platform family, engineered to accelerate validation of SAR ADCs in demanding applications where dynamic range, linearity, and low-latency sampling are critical.

FAQ

What is the primary function of the DC2290A-A evaluation board?

The DC2290A-A evaluation board is a fully assembled and tested platform for the LTC2387-18 18-bit, 15 Msps SAR ADC. It provides immediate access to all critical signals - including LVDS data outputs (DA+/DA−, DB+/DB−), DCO clock, CNV control, and power rails - enabling engineers to characterize performance, validate interface timing, and integrate the DC2290A-A into system prototypes without custom PCB development.

Does the DC2290A-A support both one-lane and two-lane LVDS output modes?

Yes, the DC2290A-A supports both LVDS output configurations via the TWOLANES jumper. When enabled, the LTC2387-18 on the DC2290A-A outputs two 9-bit words per conversion cycle across DA and DB lanes; when disabled, it outputs a single 18-bit word across DA only. This flexibility allows users to match interface bandwidth and FPGA resource constraints while maintaining full 15 Msps throughput.

How is analog input signal integrity maintained on the DC2290A-A?

The DC2290A-A preserves analog integrity through symmetric 50 Ω-terminated differential input paths with 24.9 Ω series resistors and 82 pF shunt capacitors, matching the LTC2387-18's recommended drive network. The board uses solid ground planes, short low-inductance traces to the IN+/IN− pins, and tight decoupling (0.1 µF + 10 µF per supply rail) to minimize noise coupling and ensure <96 dB SNR performance as specified for the LTC2387-18.

Can the DC2290A-A operate with an external reference instead of the internal one?

Yes. The DC2290A-A allows bypassing the LTC2387-18's internal 2.048 V reference by grounding REFIN and applying a precision external 4.096 V buffered reference to REFBUF. The board includes test points and jumpers to facilitate this configuration, supporting applications requiring tighter initial accuracy or lower temperature drift than the internal reference provides.

What power-down capability does the DC2290A-A provide for the LTC2387-18?

The DC2290A-A implements the LTC2387-18's PD (power-down) function via a header jumper and onboard logic. Asserting PD low reduces total supply current to ≤10 µW, disabling the ADC core, reference buffer, and LVDS drivers. This feature enables ultra-low-power idle states in battery-operated or duty-cycled systems using the DC2290A-A as a subsystem reference.