Analog Devices Inc. DC919A-A

Overview

DC919A-A from Analog Devices (formerly Linear Technology) is a demonstration board for the LTC2207 16-bit, 105Msps analog-to-digital converter, designed to digitize high-frequency wide-dynamic-range signals up to 700MHz input bandwidth with 78.2dBFS noise floor and 100dB spurious-free dynamic range (SFDR). It supports differential analog inputs, programmable gain amplifier (PGA), and optional internal dither for demanding RF receiver and spectrum analysis applications.

For engineers reviewing the DC919A-A datasheet, DC919A-A pinout, DC919A-A application, or DC919A-A equivalent, this evaluation platform enables rapid validation of high-speed ADC performance-including undersampling capability, clock jitter sensitivity, SFDR vs. input frequency, and PGA-configurable input ranges-in real-world signal chain designs.

Technical Context

The DC919A-A implements the LTC2207 in a fully populated, impedance-controlled layout optimized for 105Msps sampling, featuring matched 50Ω differential analog input paths, low-noise 3.3V analog supply regulation, and configurable LVDS/CMOS output termination. It integrates on-board clock conditioning with selectable duty cycle stabilization and supports both offset binary and 2's complement data formats via MODE pin configuration.

Signal integrity is maintained through dedicated ground planes, controlled-impedance routing for ENC+/ENC– and CLKOUT±, and decoupling per LTC2207 datasheet recommendations-including 2.2μF at VCM and multiple 0.1μF ceramics at VDD/OVDD pins. The board provides test points for all critical analog and digital signals, including AIN+, AIN–, ENC+, ENC–, D0–D15, CLKOUT+, CLKOUT–, and OF.

Key Specifications

Availability

DC919A-A is available at Aetrix Electronics and suitable for RF receiver development, spectrum analyzer prototyping, and high-speed data acquisition systems requiring stable component supply and proven reference design validation.

Supply support for DC919A-A 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, acquired Linear Technology in 2017 to strengthen its precision and high-speed data conversion portfolio.

The DC919A-A belongs to ADI's high-speed ADC evaluation platform family, engineered specifically to accelerate time-to-validation for communications infrastructure, defense EW, and test equipment designers needing production-ready signal chain reference designs.

FAQ

What is the primary function of the DC919A-A evaluation board?

The DC919A-A evaluation board is a fully assembled and tested hardware platform designed to demonstrate and validate the performance of the LTC2207 16-bit, 105Msps analog-to-digital converter. It provides all necessary power regulation, clock conditioning, signal routing, and interface connectors to enable immediate characterization of AC/DC specifications-including SFDR, SNR, INL/DNL, and aperture jitter-under real-world operating conditions. The DC919A-A is not a standalone product but a tool for evaluating the LTC2207.

Does the DC919A-A support both LTC2207 and LTC2206 devices?

No, the DC919A-A is specifically configured and optimized for the LTC2207 (105Msps version); it is not compatible with the LTC2206 (80Msps version) due to differences in timing margins, clock drive requirements, and layout tuning for maximum sample rate. While both share the same 48-pin QFN package and pinout, the DC919A-A's PCB stack-up, trace lengths, and power delivery are calibrated for 105Msps operation and do not guarantee stable functionality at the lower 80Msps rate without revalidation. Use DC919A-B for LTC2206 evaluation.

How is clock jitter managed on the DC919A-A board?

The DC919A-A incorporates a low-jitter clock distribution network with matched-length ENC+ and ENC– traces, on-board 0.1μF bypassing at ENC–, and support for external ultra-low-jitter sources (<80fs RMS). It also enables the LTC2207's internal clock duty cycle stabilizer via MODE pin configuration, allowing high-performance sampling across wide input clock duty cycles (40%–60%). This ensures aperture jitter remains within specification even when driven by non-ideal clock sources, directly preserving the DC919A-A's measured 78.2dBFS noise floor.

Can the DC919A-A be used for undersampling applications above Nyquist?

Yes, the DC919A-A is explicitly designed to support undersampling of RF signals up to 700MHz input frequency, leveraging the LTC2207's 700MHz full-power bandwidth and ultralow 80fsRMS aperture jitter. With proper anti-alias filtering and clock source selection, users can directly digitize IF or RF bands (e.g., 200–500MHz) while maintaining >90dB SFDR-enabling simplified receiver architectures in spectrum analyzers and broadband communications systems using the DC919A-A as a validated proof point.

What output data formats and interface options does the DC919A-A support?

The DC919A-A supports both offset binary and 2's complement output formats via the MODE pin, and delivers parallel CMOS data (D0–D15) with programmable output voltage swing (0.5V–3.6V via OVDD). It provides LVDS-compatible CLKOUT+ and CLKOUT– signals for synchronous latching, with <0.6ns data-to-clock skew. The board includes jumpers and test points to configure OE (output enable), RAND (data randomization), and DITH (internal dither), enabling flexible integration into FPGA-based capture systems using the DC919A-A.