Analog Devices Inc. DC1369A-H

Overview

DC1369A-H from Analog Devices (formerly Linear Technology) is a high-performance evaluation board for the LTC2261-12 12-bit, 125Msps analog-to-digital converter. It enables full characterization of AC performance (70.8dB SNR, 85dB SFDR), ultralow power operation (124mW at 125Msps), and flexible digital output modes (CMOS, DDR CMOS, DDR LVDS) in demanding RF sampling applications such as software-defined radios and cellular base stations.

For engineers reviewing the DC1369A-H datasheet, DC1369A-H pinout, DC1369A-H application, or DC1369A-H equivalent, this page provides verified hardware configuration details, validated signal integrity layout practices, supported ADC operating modes (including clock duty cycle stabilization and output randomization), and direct integration guidance with FPGA-based data capture systems using LVDS or CMOS interfaces.

Technical Context

The DC1369A-H implements a complete signal chain around the LTC2261-12, featuring a precision differential analog input network with 50Ω matched trace routing, ultra-low-jitter (<0.17ps RMS) clock distribution via SMA input and on-board oscillator options, and configurable termination for all 12-bit parallel or DDR outputs. It supports both internal (1.25V) and external reference configurations via the SENSE pin.

Board-level features include SPI interface access to the LTC2261-12's mode registers for real-time control of nap/sleep modes, output format selection (PAR/SER), clock duty cycle stabilizer enable/disable, and data output randomization - all accessible through onboard headers or USB-based demonstration software.

Key Specifications

Availability

DC1369A-H is available at Aetrix Electronics and suitable for RF test equipment development, SDR prototyping, and medical ultrasound front-end validation requiring stable component supply, calibrated evaluation platforms, and long-term design-in support.

Supply support for DC1369A-H 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 technologies, serving aerospace, communications, industrial, and healthcare markets.

The DC1369A-H belongs to ADI's Linear Technology Evaluation Board product line, designed specifically to accelerate time-to-validation for high-speed data converters by providing production-grade PCB layouts, characterized signal paths, and factory-calibrated performance benchmarks.

FAQ

What is the primary function of the DC1369A-H evaluation board?

The DC1369A-H evaluation board is a fully assembled and tested platform for evaluating the LTC2261-12 12-bit, 125Msps analog-to-digital converter. It provides calibrated analog input conditioning, low-jitter clocking, configurable digital output interfaces (CMOS/LVDS), and SPI-accessible register control - enabling engineers to validate dynamic performance (SNR, SFDR), power consumption, and system integration before committing to custom PCB design. The DC1369A-H does not contain the LTC2261-12 as a replaceable component; it is permanently mounted and factory-aligned.

Does the DC1369A-H support all three members of the LTC2261-12/LTC2260-12/LTC2259-12 family?

No - the DC1369A-H is specifically designed and calibrated for the LTC2261-12 (125Msps version) only. While the pinout is identical across the family, the board's layout, clock tree tuning, power delivery, and firmware are optimized for 125Msps operation and cannot be reliably used with the 105Msps (LTC2260-12) or 80Msps (LTC2259-12) variants without recharacterization. Using those parts on the DC1369A-H may result in degraded jitter, SNR, or timing margin violations.

How is the analog input configured on the DC1369A-H?

The DC1369A-H provides a single-ended SMA input that drives a wideband balun (Mini-Circuits TC3-1T+) to generate a differential signal for the LTC2261-12's AIN+/AIN– inputs. Input range is selectable via the SENSE pin: 2VP-P (SENSE = VDD), 1VP-P (SENSE = GND), or user-defined ±0.8×V_SENSE (external reference applied). The analog path includes matched 50Ω microstrip routing and dedicated ground plane isolation to preserve 800MHz full-power bandwidth and minimize harmonic distortion.

Can the DC1369A-H operate in DDR LVDS mode with proper termination?

Yes - the DC1369A-H supports DDR LVDS output mode with on-board 100Ω differential termination enabled via jumpers. When configured for DDR LVDS, pins D0_1± through D10_11± and CLKOUT± drive into matched 100Ω loads, and the OVDD rail is set to 1.8V. The board includes series resistors and controlled-impedance routing to maintain signal integrity up to 250Mbps per lane, meeting ANSI/TIA/EIA-644-A LVDS specifications as implemented in the LTC2261-12.

Is SPI communication functional on the DC1369A-H, and how is it accessed?

Yes - SPI communication is fully functional on the DC1369A-H and is routed to a 10-pin header (J2) for connection to external controllers or ADI's demonstration software. The PAR/SER pin is hardwired to ground to enable serial programming mode, making CS, SCK, SDI, and SDO active. The SDO line includes a 2kΩ pull-up resistor to 1.8V, and all signals comply with 1.8V logic levels. Register reads/writes allow real-time control of nap mode, output randomization, clock duty cycle stabilizer, and output format selection.