Analog Devices Inc. DC1369A-G

Overview

DC1369A-G from Analog Devices (formerly Linear Technology) is a fully populated, USB-powered evaluation board for the LTC2261-12 12-bit, 125Msps analog-to-digital converter. It features differential analog input, selectable CMOS/LVDS DDR outputs, 70.8dB SNR, 85dB SFDR, and ultralow 0.17psRMS jitter - enabling high-fidelity undersampling of IF signals in software-defined radio and portable medical imaging systems.

For engineers reviewing the DC1369A-G datasheet, DC1369A-G pinout, DC1369A-G application, or DC1369A-G equivalent, this board provides validated signal integrity, SPI-configurable ADC modes (Nap/Sleep, randomizer, duty cycle stabilizer), and direct interface to PC via USB 2.0 for real-time FFT analysis and dynamic performance validation at 125Msps.

Technical Context

The DC1369A-G implements the LTC2261-12 in full-rate CMOS and double-data rate LVDS output configurations, with on-board clock conditioning, precision reference decoupling (2.2µF + 0.1µF per REFH/REFL), and matched 50Ω differential input path supporting up to 800MHz full-power bandwidth. It supports both internal (±1V or ±0.5V) and external reference modes via the SENSE pin.

Board-level design includes isolated analog/digital grounds, dedicated OVDD/VDD regulation, and configurable PAR/SER mode selection for serial (SPI) or parallel control of encode timing, output format, and power states - all accessible through the LTSpice-compatible demo software and open-source firmware.

Key Specifications

Availability

DC1369A-G is available at Aetrix Electronics and suitable for software-defined radio development, cellular base station prototyping, and portable ultrasound imaging systems requiring stable component supply, traceable evaluation hardware, and production-ready signal chain validation.

Supply support for DC1369A-G 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 for precision measurement and high-speed data conversion.

The DC1369A-G belongs to Analog Devices' high-speed ADC evaluation platform family, engineered to accelerate time-to-validation for RF sampling, communications infrastructure, and medical imaging applications demanding sub-0.2ps jitter and >70dB SNR at 100+ Msps.

FAQ

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

The DC1369A-G is a ready-to-run evaluation platform for the LTC2261-12 12-bit, 125Msps ADC. It enables immediate characterization of dynamic performance (SNR, SFDR, jitter), configuration via SPI, and interface to host PC using USB 2.0 - eliminating custom PCB design for proof-of-concept and pre-compliance testing of the DC1369A-G's target signal chain.

Does the DC1369A-G support both CMOS and LVDS output modes for the LTC2261-12?

Yes, the DC1369A-G supports all three digital output configurations specified for the LTC2261-12: full-rate CMOS, double-data rate CMOS, and double-data rate LVDS. Output mode is selected via the SCK pin (parallel mode) or SPI register write, and the board includes proper termination, routing, and level-shifting for each mode as defined in the DC1369A-G hardware design files.

Can the DC1369A-G operate with an external analog input clock, and what are the requirements?

Yes, the DC1369A-G accepts differential (ENC+/ENC–) or single-ended (ENC+ only, ENC– grounded) clock inputs. Supported frequencies range from 1MHz to 125MHz, with <50% duty cycle tolerance when the duty cycle stabilizer is disabled, and wide tolerance (20%–80%) when enabled - as verified in the DC1369A-G user guide and confirmed by onboard clock conditioning circuitry.

How is the reference voltage configured on the DC1369A-G, and what input ranges does it support?

The DC1369A-G uses the LTC2261-12's SENSE pin to configure reference mode: tied to VDD for ±1V internal range, grounded for ±0.5V, or driven with 0.625V–1.3V for ±0.8×VSENSE. The board includes jumpers and test points to verify SENSE voltage and supports both internal (1.25V VREF) and external reference topologies per the DC1369A-G schematic.

Is the DC1369A-G compatible with standard PC-based data capture and analysis tools?

Yes, the DC1369A-G includes USB 2.0 connectivity and ships with Analog Devices' free Digital Signal Analyzer (DSA) software, which supports real-time FFT, histogram, SNR/SFDR calculation, and export to MATLAB/CSV. All register-level control and data streaming for the DC1369A-G are implemented via documented HID-class USB commands and open-source drivers.