Analog Devices Inc. DC919A-H

Overview

DC919A-H from Analog Devices (formerly Linear Technology) is a high-performance evaluation board for the LTC2207-14 14-bit, 105Msps analog-to-digital converter. It enables full characterization of AC/DC performance-including 77.3dB SNR, 98dB SFDR, and 80fsRMS jitter-at input frequencies up to 700MHz, with support for differential analog inputs, programmable gain amplifier (PGA), and optional internal dither. It is used in RF receiver signal chains for cellular base stations and spectrum analyzers.

For engineers reviewing the DC919A-H datasheet, DC919A-H pinout, DC919A-H application, or DC919A-H equivalent, this page provides verified hardware configuration details, supported ADC interface modes (LVDS/CMOS), clocking options (duty cycle stabilizer enabled), power sequencing requirements, and FPGA-compatible data capture timing-critical for rapid prototyping of wideband digitization systems.

Technical Context

The DC919A-H implements a complete signal chain around the LTC2207-14, including matched 50Ω differential analog input path with transformer-coupled or direct-connect options, low-noise LDO-regulated 3.3V analog and digital supplies, and configurable LVDS output termination. It supports both internal and external reference modes via the SENSE pin and allows real-time adjustment of PGA gain (0/1) and dither enable/disable through onboard jumpers.

Board-level timing is synchronized using the LTC2207-14's ENC+/ENC– differential clock inputs, with on-board SMA connectors for clock injection and CLKOUT+/CLKOUT– feedback. The board routes all 14 data bits (D0–D13), OF (out-of-range), and control signals (OE, RAND, MODE, DITH, SHDN) to a 40-pin header compatible with Digilent Pmod or custom FPGA carrier interfaces.

Key Specifications

Availability

DC919A-H is available at Aetrix Electronics and suitable for RF receiver development, automated test equipment (ATE) validation, and high-speed digitizer design requiring stable component supply, traceable evaluation hardware, and documented signal integrity performance.

Supply support for DC919A-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 communications, industrial, automotive, and instrumentation markets.

The DC919A-H belongs to ADI's Linear Technology evaluation board family, engineered specifically to accelerate adoption of precision high-speed ADCs by providing production-ready layouts, calibrated performance data, and interoperable FPGA interface options.

FAQ

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

The DC919A-H evaluation board is designed exclusively to evaluate the LTC2207-14 14-bit, 105Msps analog-to-digital converter. It provides a fully tested, impedance-matched platform for measuring dynamic performance (SNR, SFDR, jitter), validating clocking schemes (including duty cycle stabilization), and integrating the ADC into wideband receiver systems. DC919A-H includes all necessary power regulation, signal conditioning, and interface routing to eliminate prototype risk.

Does the DC919A-H support both LTC2207-14 and LTC2206-14?

No - the DC919A-H is configured and optimized for the LTC2207-14 (105Msps variant). While the LTC2206-14 shares the same pinout and package, its lower sample rate (80Msps) and distinct AC performance curves require separate evaluation setup and calibration. DC919A-H's clock distribution, power delivery, and layout are tuned for 105Msps operation; using it with LTC2206-14 is possible but not validated or characterized.

Can the DC919A-H operate with single-ended clock inputs?

Yes - the DC919A-H supports single-ended clock drive via the ENC+ input with ENC– AC-coupled to 1.6V common mode, as specified in the LTC2207-14 datasheet. The board includes a 0.1µF bypass capacitor on ENC– and jumper options to configure biasing. However, differential clocking is recommended for optimal jitter performance, and the board's SMA clock input is wired for differential LVPECL/LVDS sources.

What reference voltage options does the DC919A-H support for the LTC2207-14?

The DC919A-H supports both internal and external reference configurations for the LTC2207-14. By default, SENSE is tied to VDD to select the internal 2.5V bandgap reference (yielding 2.25VP-P full-scale range). An external 1.25V or 2.5V reference can be applied to the SENSE test point, enabling precise system-level reference sharing. All configurations are validated per LTC2207-14 specifications, and DC919A-H includes appropriate decoupling for each mode.

Is FPGA interface support built into the DC919A-H design?

Yes - the DC919A-H routes all critical LTC2207-14 signals (D0–D13, OF, OE, CLKOUT+, CLKOUT−, MODE, RAND, DITH, SHDN) to a 40-pin 0.1" header compatible with standard FPGA carrier boards and Digilent Pmod ecosystems. LVDS outputs are terminated on-board with 100Ω differential resistors, and level-shifting options allow direct connection to 3.3V/2.5V/1.8V FPGA I/O banks without external logic. Timing margins meet Xilinx and Intel FPGA setup/hold requirements at 105Msps.