Analog Devices Inc. DC2290A-B

Overview

DC2290A-B from Analog Devices (formerly Linear Technology) is a fully assembled, RoHS-compliant evaluation board designed to demonstrate the performance of the LTC2387-16 - a 16-bit, 15Msps low-noise SAR ADC with serial LVDS interface, ±0.8 LSB INL (max), 93.8 dB SNR (typ), and 32-pin 5mm × 5mm QFN package. It supports differential analog inputs up to ±4.096 V and operates from 5 V and 2.5 V supplies.

For engineers reviewing the DC2290A-B datasheet, DC2290A-B pinout, DC2290A-B application, or DC2290A-B equivalent, this page provides verified hardware configuration details, supported ADC interface modes (one-lane/two-lane LVDS), clocking requirements (LVDS CLK±), power supply sequencing, and validated signal integrity layout practices for high-speed data acquisition systems.

Technical Context

The DC2290A-B implements the LTC2387-16 in its UH (32-pin QFN) package with full support for both one-lane and two-lane LVDS output modes, selectable via the TWOLANES jumper. It includes precision decoupling (0.1 µF + 10 µF per supply rail), matched 24.9 Ω source termination on analog inputs, and dedicated LVDS routing with controlled impedance traces.

Board-level features include configurable CNV start mode (single-ended or differential), PD-controlled power-down, TESTPAT-driven digital test pattern generation, and buffered reference path using the LTC2387-16's internal 2.048 V reference and 4.096 V reference buffer. All critical timing parameters - including tCONV (54–63 ns), tCYC (66.6 ns min), and LVDS skew (±200 ps) - are preserved per the ADC's datasheet specifications.

Key Specifications

Availability

DC2290A-B is available at Aetrix Electronics and suitable for high-speed data acquisition, medical imaging front-ends, automated test equipment (ATE), and real-time control loop prototyping requiring stable component supply and production-ready evaluation hardware.

Supply support for DC2290A-B 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 (DSP) technologies, serving industrial, automotive, communications, and healthcare markets.

The DC2290A-B belongs to ADI's Linear Technology legacy evaluation board portfolio, specifically engineered to accelerate development of precision, high-speed data conversion systems using SAR ADCs with LVDS interfaces.

FAQ

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

The DC2290A-B evaluation board is a ready-to-use hardware platform that demonstrates and validates the operation of the LTC2387-16 16-bit, 15 Msps SAR ADC. It provides all necessary power regulation, signal conditioning, LVDS interface routing, and reference circuitry to enable immediate characterization of dynamic performance (SNR, SFDR, THD), timing behavior, and system-level integration - without requiring custom PCB design. The DC2290A-B allows engineers to evaluate the LTC2387-16 under real-world conditions before committing to final system design.

Does the DC2290A-B support both one-lane and two-lane LVDS output modes for the LTC2387-16?

Yes, the DC2290A-B supports both LVDS output configurations via the TWOLANES jumper (JP1). When JP1 is installed, the LTC2387-16 operates in two-lane mode, outputting two bits per clock cycle on DA± and DB±. When JP1 is removed, it defaults to one-lane mode, using only DA±. This matches the LTC2387-16's native capability and preserves timing margins - including tCLKD (0.7–2.3 ns) and tSKEW (±200 ps) - as specified in the DC2290A-B user guide and LTC2387-16 datasheet.

How is the analog input signal conditioned on the DC2290A-B for optimal LTC2387-16 performance?

The DC2290A-B conditions analog inputs using matched 24.9 Ω series resistors on IN+ and IN−, 82 pF AC-coupling capacitors, and precise 2.048 V common-mode bias (VCM). This configuration ensures proper differential drive, minimizes reflections, maintains <1% gain error, and sustains the LTC2387-16's 93.8 dB SNR and ±0.8 LSB INL. The board also routes IN+/IN− over controlled-impedance, length-matched microstrip traces to preserve signal integrity up to 7.5 MHz Nyquist input bandwidth.

Can the DC2290A-B operate using the LTC2387-16's internal reference, or does it require an external reference?

The DC2290A-B is configured to use the LTC2387-16's internal 2.048 V reference (REFIN) and integrated 2× reference buffer (REFBUF = 4.096 V) by default. REFIN is bypassed with a 0.1 µF capacitor, and REFBUF is decoupled with a 10 µF X7R ceramic capacitor to REFGND. No external reference is required. The board includes test points and jumpers to optionally disable the internal buffer and connect an external 4.096 V reference to REFBUF if higher accuracy or lower drift is needed.

What power supply requirements must be met to operate the DC2290A-B with the LTC2387-16 at full 15 Msps throughput?

To operate the DC2290A-B at full 15 Msps, three clean, low-noise supplies are required: +5.0 V @ ≥ 35 mA for VDD (analog core), +2.5 V @ ≥ 10.3 mA for VDDL (digital logic), and +2.5 V @ ≥ 8.8 mA for OVDD (LVDS output drivers). Each rail must be independently bypassed per the board layout - 0.1 µF ceramic + 10 µF bulk for VDD/VDDL, and 0.1 µF for OVDD - to maintain the LTC2387-16's 125 mW total power dissipation and avoid supply-induced noise degradation in SNR or SFDR measurements.