Analog Devices Inc. DC1751A-F

Overview

DC1751A-F from Analog Devices (formerly Linear Technology) is an evaluation board for the LTM9008-14 - an 8-channel, simultaneous-sampling, 14-bit, 65Msps low-power octal ADC with serial LVDS outputs, 73dB SNR, 90dB SFDR, and integrated bypass capacitance in a 140-pin BGA package. It enables high-fidelity digitization of wideband RF signals up to 800MHz full-power bandwidth in multichannel SDR and medical imaging systems.

For engineers reviewing the DC1751A-F datasheet, DC1751A-F pinout, DC1751A-F application, or DC1751A-F equivalent, this page provides verified board-level specifications, supported ADC variants (LTM9008-14/LTM9007-14/LTM9006-14), interface configuration options (SPI, LVDS serialization modes), power sequencing guidance, and real-world performance validation data including FFT plots and SNR/SFDR vs frequency curves.

Technical Context

The DC1751A-F implements a complete signal chain for the LTM9008-14 ADC, featuring differential analog input conditioning with transformer-coupled or direct-connect options, precision clock distribution via SMA inputs supporting single-ended (TTL/CMOS) or differential (LVDS/PECL) encode signals, and configurable LVDS output termination. It supports all three speed grades (65/40/25 Msps) and both 1-lane and 2-lane serialization modes.

Board-level design includes on-board 1.8V analog (VDD) and output (OVDD) regulation, dedicated ground planes for analog/digital domains, flow-through pinout routing to minimize crosstalk, and SPI interface access for register configuration of gain, offset, shutdown, and nap modes. The layout adheres to high-speed ADC layout best practices including controlled-impedance traces and localized decoupling.

Key Specifications

Availability

DC1751A-F is available at Aetrix Electronics and suitable for cellular base station development, software-defined radio prototyping, portable medical ultrasound front-ends, and multichannel data acquisition systems requiring stable component supply and rapid time-to-test.

Supply support for DC1751A-F 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 instrumentation, communications, and industrial applications.

The DC1751A-F belongs to Analog Devices' high-speed ADC evaluation platform family, designed specifically to accelerate adoption of µModule® ADCs like the LTM9008 series by providing production-ready reference layouts, validated timing margins, and comprehensive characterization data.

FAQ

What is the primary function of the DC1751A-F evaluation board?

The DC1751A-F evaluation board is a fully assembled and tested platform for evaluating the LTM9008-14, LTM9007-14, and LTM9006-14 octal ADCs. It provides all necessary signal conditioning, clocking, power regulation, and digital interface circuitry to validate AC/DC performance, verify LVDS serialization behavior, and integrate the ADC into multichannel systems. DC1751A-F enables immediate bench testing without custom PCB design.

Which ADC variants are supported by the DC1751A-F?

The DC1751A-F supports all three members of the LTM900x-14 family: LTM9008-14 (65Msps), LTM9007-14 (40Msps), and LTM9006-14 (25Msps). Each variant shares identical pinout, package (140-pin BGA), and register map, allowing the same DC1751A-F board to be used across speed grades with only firmware and clock rate adjustments. DC1751A-F documentation includes separate performance plots for each variant.

Does the DC1751A-F support both 1-lane and 2-lane LVDS serialization modes?

Yes, the DC1751A-F fully supports both serialization modes. In 2-lane mode, each ADC channel outputs two bits per clock cycle on dedicated OUT#A+/– and OUT#B+/– pairs. In 1-lane mode, only OUT#A+/– is active per channel, reducing pin count and power. Mode selection is controlled via the PAR/SER pin and confirmed in the LTM9008-14's mode registers. DC1751A-F includes jumpers and documentation for seamless switching between modes.

How is clock jitter managed on the DC1751A-F to preserve ADC performance?

The DC1751A-F routes the encode clock (ENC+/–) with matched-length, 100Ω differential microstrip traces and includes a dedicated SMA input with internal 50Ω termination. The LTM9008-14's integrated duty cycle stabilizer (DCS) is enabled by default, reducing sensitivity to input clock asymmetry. Measured aperture jitter on DC1751A-F is ≤0.15ps RMS at 65Msps, directly enabling the 73dB SNR specification of the DC1751A-F's target ADC.

Can the DC1751A-F be used for production-level signal integrity validation?

Yes - the DC1751A-F uses production-grade layout practices: 4-layer stackup with solid ground/power planes, controlled-impedance LVDS traces (100Ω differential), localized 0.1µF ceramic decoupling at each VDD/OVDD pin, and optimized analog input return paths. Its measured performance (e.g., 90dB SFDR at 70MHz input) matches datasheet specifications, making DC1751A-F suitable for pre-compliance testing and reference design validation prior to custom board spin.