Analog Devices Inc. DC1298A-LA

Overview

DC1298A-LA from Analog Devices (formerly Linear Technology) is an evaluation board built around the LTM9002 - a 14-bit dual-channel IF/baseband receiver subsystem integrating RF amplifiers, anti-alias filters, and ADCs in a µModule package. It supports single-ended 50Ω RF input on channels A and B, delivers CMOS digital outputs, and interfaces directly with the DC890 data acquisition controller for real-time FFT analysis via PScope software.

For engineers reviewing the DC1298A-LA datasheet, DC1298A-LA pinout, DC1298A-LA application, or DC1298A-LA equivalent, this board enables rapid validation of high-speed dual-channel receiver performance in communications infrastructure, radar front-ends, and spectrum monitoring systems - with emphasis on SNR, SFDR, and clock jitter sensitivity.

Technical Context

The DC1298A-LA implements the LTM9002's dual 14-bit, 135 MSPS ADC architecture with integrated wideband amplifiers and anti-alias filtering. It supports both single-ended and differential input configurations via configurable jumpers JP1 and JP2, and uses on-board low-noise regulators to generate four independent supply rails (3.3V, 2.5V, 1.8V, 1.2V) from a single 3.3–6V input.

Signal integrity is maintained through 50Ω impedance-matched SMA connectors (J1, J4 for inputs; J6 for clock), transformer-coupled IF paths, and dedicated reference inputs (E1, E2) for full-scale range adjustment. The board requires external low-phase-noise clocking (e.g., DC1216) to preserve >72.5dBFS SNR and >85dBc SFDR performance.

Key Specifications

Availability

DC1298A-LA is available at Aetrix Electronics and suitable for RF receiver validation, high-speed data acquisition system prototyping, and communications test bench development requiring stable component supply and traceable evaluation hardware.

Supply support for DC1298A-LA 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 acquired Linear Technology in 2017 and maintains its µModule product line, known for highly integrated, tested, and packaged signal chain subsystems.

The DC1298A-LA belongs to Linear Technology's demonstration circuit series for high-performance analog-to-digital receiver subsystems, designed specifically to accelerate RF/IF receiver design verification and system-level performance benchmarking.

FAQ

What is the primary function of the DC1298A-LA evaluation board?

The DC1298A-LA is a fully assembled demonstration circuit for the LTM9002 dual-channel 14-bit IF/baseband receiver subsystem. Its primary function is to provide a validated, ready-to-use platform for evaluating dynamic performance metrics-including SNR, SFDR, and clock jitter sensitivity-of the LTM9002 in real-world RF receiver applications without custom PCB design.

Which ADC does the DC1298A-LA evaluate, and what are its key electrical specs?

The DC1298A-LA evaluates the LTM9002, a 14-bit, dual-channel, 135 MSPS ADC with integrated IF amplifiers and anti-alias filters. Key specs include 72.5dBFS SNR at 10MHz input, 85dBc SFDR, –154dBm/Hz input noise floor, and support for 50Ω single-ended or differential inputs - all verified using the DC1298A-LA's optimized layout and regulated power delivery.

Does the DC1298A-LA require external clocking, and why is clock quality critical?

Yes, the DC1298A-LA requires an external low-phase-noise clock applied via SMA connector J6. Clock jitter directly degrades ADC SNR; the LTM9002's 72.5dBFS SNR specification assumes ≤100fs RMS jitter. Using noisy clocks (e.g., unfiltered synthesizers) reduces measured SNR - making clock source selection and filtering essential during DC1298A-LA evaluation.

How does the DC1298A-LA interface with data acquisition and analysis tools?

The DC1298A-LA connects directly to the DC890B FastDAACS controller via a standard ribbon cable. Its CMOS digital outputs feed into the DC890B, which streams data to a Windows PC running Analog Devices' free PScope software - enabling real-time FFT, spectral analysis, histogram, and ENOB calculation without additional firmware or driver setup.

Can the DC1298A-LA operate with differential input signals, and how is it configured?

Yes, the DC1298A-LA supports differential input configuration on both channels. Jumper settings and optional external termination allow J2 (–INA) and J3 (–INB) to serve as negative inputs, converting J1/J4 into differential pairs. This configuration preserves common-mode rejection and improves noise immunity - verified in the LTM9002 datasheet and demonstrated in DC1298A-LA application notes.