Analog Devices Inc. DC1298A-AA

Overview

DC1298A-AA from Analog Devices (formerly Linear Technology) is an evaluation board for 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 or differential RF input up to 500 MHz, delivers 73.5 dBFS SNR at 125 MSPS, and interfaces directly with DC890B data acquisition hardware via CMOS outputs.

For engineers reviewing the DC1298A-AA datasheet, DC1298A-AA pinout, DC1298A-AA application, or DC1298A-AA equivalent, this page provides verified layout practices, clock interface requirements, reference configuration options, CMOS output timing behavior, and PScope software integration details essential for high-speed receiver system validation.

Technical Context

The DC1298A-AA implements the LTM9002's full signal chain: wideband transformer-coupled inputs feed dual 14-bit 125 MSPS ADCs with integrated 2nd-order anti-alias filters and programmable gain amplifiers. Clocking is via 50Ω SMA J6 with strict low-phase-noise requirements to preserve SNR.

Reference configuration is flexible: internal VDD-based reference is default (JP2 closed), but external references can be applied at E1/E2 to adjust full-scale range of each channel independently. Output data is delivered as parallel CMOS signals compatible with DC890B's FastDAACS interface.

Key Specifications

Availability

DC1298A-AA is available at Aetrix Electronics and suitable for RF receiver validation, communications test equipment development, high-speed data acquisition system prototyping, and µModule-based IF digitization requiring stable component supply and documented reference design support.

Supply support for DC1298A-AA 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 as high-integration, fully tested subsystem solutions for power, signal chain, and RF applications.

The DC1298A-AA belongs to Linear Technology's demonstration circuit series designed specifically to validate µModule receiver subsystems like the LTM9002 in real-world RF/IF digitization scenarios with minimal external circuitry.

FAQ

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

The DC1298A-AA is a dedicated evaluation platform for the LTM9002 µModule, enabling rapid validation of its dual-channel 14-bit 125 MSPS IF/baseband receiver performance. It provides transformer-coupled 50Ω inputs, on-board regulation, CMOS outputs, and full compatibility with DC890B and PScope software - all pre-configured to demonstrate optimal signal integrity and layout practices for high-speed receiver designs using the DC1298A-AA.

Does the DC1298A-AA support differential input signals?

Yes, the DC1298A-AA supports both single-ended and differential configurations. J1 (+INA) and J2 (−INA) form channel A's differential pair; J4 (−INB) and J3 (+INB) form channel B's pair. Though J1 and J4 are impedance-matched 50Ω single-ended inputs by default, jumpers and layout allow reconfiguration to true differential mode - a capability confirmed in the DC1298 schematic and Quick Start Guide for the DC1298A-AA.

What clock source specifications are required for optimal DC1298A-AA performance?

The DC1298A-AA requires a low-phase-noise clock source applied to SMA connector J6. High jitter degrades SNR - the Quick Start Guide explicitly warns that noisy clocks degrade system SNR similarly to noisy inputs. Recommended sources include filtered RF generators (e.g., HP 8644B) or dedicated low-jitter oscillators like DC1216. The DC1298A-AA's 50Ω clock input mandates proper termination to maintain signal integrity and minimize reflections.

How does the DC1298A-AA interface with data acquisition hardware?

The DC1298A-AA connects directly to the DC890B FastDAACS demo board via standard ribbon cable. Its parallel CMOS outputs deliver time-aligned 14-bit data from both LTM9002 channels, synchronized to the same clock domain. This interface is fully supported by Linear Technology's free PScope software, which auto-detects the DC1298A-AA via on-board EEPROM U5 and configures FFT, histogram, and spectral analysis parameters accordingly.

Can the reference voltage on the DC1298A-AA be modified for each channel independently?

Yes, the DC1298A-AA allows independent full-scale range adjustment per channel. E1 (EXT REF A) and E2 (EXT REF B) provide dedicated reference inputs tied to the SENSE pins of each LTM9002 channel. By default, JP2 connects both to VDD for internal reference, but removing JP2 and applying external references to E1/E2 enables channel-specific scaling - a feature documented in Table 1 and used in calibration workflows for the DC1298A-AA.