Analog Devices Inc. DC1250A-AA

Overview

DC1250A-AA from Analog Devices (formerly Linear Technology) is an evaluation board for the LTM9001 16-bit receiver subsystem, integrating a high-performance ADC driver, 16-bit SAR ADC, and on-chip reference in a µModule package. It supports single-ended RF input via 50Ω-matched J1, CMOS digital output at up to 130 MSPS, and operates from 3.8V–6V with on-board low-noise regulators.

For engineers reviewing the DC1250A-AA datasheet, DC1250A-AA pinout, DC1250A-AA application, or DC1250A-AA equivalent, key selection considerations include its role as a ready-to-use LTM9001 evaluation platform, compatibility with DC890 data acquisition hardware, CMOS/LVDS output mode configuration, input coupling flexibility (AC/DC, single-ended/differential), and PScope software integration via onboard EEPROM U5.

Technical Context

The DC1250A-AA implements a complete signal chain evaluation environment for the LTM9001 µModule, which integrates a wideband differential amplifier, 16-bit 130MSPS SAR ADC, and internal reference. Its layout follows RF-sensitive design practices including controlled-impedance traces, ground plane integrity, and transformer-coupled input (T1) for single-ended-to-differential conversion.

Board-level features include configurable gain (via JP1), amplifier enable (JP5), ADC shutdown (JP3), dither control (JP4), and output randomization (JP2). The default CMOS output format is demultiplexed A/B channel interleaving at half-data-rate per channel, while LVDS mode requires R19 removal and manual PScope reconfiguration.

Key Specifications

Availability

DC1250A-AA is available at Aetrix Electronics and suitable for high-speed data acquisition system validation, RF receiver front-end characterization, and 16-bit ADC subsystem prototyping requiring stable component supply and rapid lab evaluation capability.

Supply support for DC1250A-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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies.

The DC1250A-AA belongs to Linear Technology's demonstration circuit (DC) series, designed specifically to accelerate evaluation of µModule-based signal chain components like the LTM9001 for communications, instrumentation, and defense applications.

FAQ

What is the primary function of the DC1250A-AA evaluation board?

The DC1250A-AA is a dedicated evaluation platform for the LTM9001 16-bit receiver subsystem µModule. It provides a validated PCB layout, optimized external circuitry-including a wideband input transformer and CMOS output buffers-and seamless integration with the DC890 data acquisition board and PScope software. DC1250A-AA enables rapid performance validation of the LTM9001 in real-world signal chain configurations without custom design effort.

Does the DC1250A-AA support both CMOS and LVDS digital outputs from the LTM9001?

Yes, the DC1250A-AA supports both output modes. By default, it operates in demultiplexed CMOS mode with alternating A/B channel outputs. To enable full-data-rate LVDS output, resistor R19 must be removed to ground the LVDS pin on the LTM9001. Note that PScope requires manual reconfiguration to 2-channel mode and ignores the B channel when using LVDS mode on DC1250A-AA.

How does the DC1250A-AA handle input signal coupling and configuration?

The DC1250A-AA supports AC-coupled single-ended input (default, using transformer T1), AC-coupled single-ended without transformer (T1 replaced with 0Ω jumpers), DC-coupled single-ended (C1/C8 replaced with 0Ω jumpers), and differential input (R7 removed, R5 installed). All configurations require adherence to the LTM9001's input common-mode voltage limits-especially critical for DC-coupled operation on DC1250A-AA.

What power supply requirements does the DC1250A-AA have?

The DC1250A-AA requires a single 3.8V–6V DC input capable of delivering ≥1A. On-board low-noise linear regulators generate the three required LTM9001 supply rails: VDD (digital core), VDDA (analog), and VDDD (driver). A low-phase-noise clock source must be supplied separately via SMA connector J3, and a clean lab-grade power supply is essential to preserve SNR-noise or ripple on the input rail directly degrades LTM9001 performance on DC1250A-AA.

Is PScope software automatically configured for the DC1250A-AA?

Yes-DC1250A-AA includes EEPROM U5 programmed to identify the board to Analog Devices' PScope software, enabling automatic detection and correct parameter loading (e.g., sampling rate, channel count, data format). If auto-detection fails, users can manually configure PScope via the Configure menu, selecting "DC1250A-AA" under device type and verifying settings such as 2-channel demultiplexed CMOS mode and appropriate clock rate.