Analog Devices Inc. DC910A

Overview

DC910A from Analog Devices (formerly Linear Technology) is a demonstration circuit board designed to evaluate the LT5557 high-linearity active downconverting mixer with discrete IF balun for 240MHz IF output. It supports RF input from 1.6–2.3GHz, LO input from 1–5GHz, delivers 2.9dB conversion gain, 24.7dBm IIP3, and 11.7dB single-sideband noise figure at 3.3V supply.

For engineers reviewing the DC910A datasheet, DC910A pinout, DC910A application, or DC910A equivalent, this board enables rapid validation of LT5557 mixer performance in RF front-end downconversion, IF interface design, spurious product analysis, and high-dynamic-range receiver prototyping under real-world signal conditions.

Technical Context

DC910A implements the LT5557 IC in a fully assembled, impedance-matched configuration: RF and LO ports are internally matched to 50Ω across their respective bands (1.6–2.3GHz and 1–5GHz), while the differential IF output is terminated via discrete passive balun to 50Ω at 240MHz. The board uses no transformers on RF/LO paths, relying instead on integrated broadband transformers inside the LT5557.

The discrete balun architecture trades IF bandwidth (220–260MHz) for higher conversion gain (+2.9dB) versus transformer-based alternatives, while maintaining >41dB RF-to-IF isolation and <−42dBm LO-to-IF leakage. All measurements assume V_CC = 3.3V, EN = High, and T_A = 25°C per Table 1.

Key Specifications

Availability

DC910A is available at Aetrix Electronics and suitable for RF receiver prototyping, cellular infrastructure front-end validation, spectrum analyzer subsystem development, and high-linearity downconverter design requiring stable component supply and documented reference performance.

Supply support for DC910A 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. (including legacy Linear Technology products) is a global leader in high-performance analog, mixed-signal, and RF ICs, serving communications, industrial, automotive, and instrumentation markets.

The DC910A belongs to Analog Devices' demonstration circuit family for RF mixers and signal chain components, engineered specifically to accelerate evaluation of high-dynamic-range downconversion ICs like the LT5557 in real-world RF system contexts.

FAQ

What is the primary function of the DC910A demonstration circuit?

The DC910A demonstration circuit provides a ready-to-use hardware platform for evaluating the LT5557 active downconverting mixer. It implements full RF/LO/IF signal path matching, discrete IF balun termination at 240MHz, and verified biasing to deliver published specifications including 2.9dB conversion gain and 24.7dBm IIP3. Engineers use DC910A to validate mixer behavior before integrating the LT5557 into custom PCB designs.

Does DC910A support both low-side and high-side LO injection?

Yes, DC910A supports both low-side and high-side LO injection for downconversion to 240MHz IF, as confirmed by its operational frequency ranges: RF input 1.6–2.3GHz and LO input 1–5GHz. This allows flexible LO placement (e.g., f_LO = f_RF − 240MHz or f_LO = f_RF + 240MHz), enabling image-reject receiver architectures without hardware modification to the DC910A board.

What is the IF output interface type on DC910A?

The DC910A provides a differential IF output derived from the LT5557's internal differential IF nodes, terminated through a discrete passive balun to a single-ended 50Ω SMA connector at 240MHz. This configuration avoids transformer-based matching, yielding higher conversion gain but narrower IF bandwidth (220–260MHz) compared to alternative balun methods.

Can DC910A be used with supply voltages other than 3.3V?

Yes, DC910A operates across the LT5557's specified supply range of 2.9V to 3.9V. Performance metrics such as conversion gain, IIP3, and noise figure are characterized at 3.3V, but the board supports stable operation at other voltages within that range - e.g., 3.0V for lower power or 3.6V for margin testing - provided current delivery and thermal management are maintained.

Is DC910A RoHS-compliant and lead-free?

Yes, DC910A conforms to RoHS Directive 2011/65/EU and is manufactured with lead-free solder and compliant passive components. Analog Devices certifies all demonstration circuits, including DC910A, to meet JEDEC J-STD-020 moisture sensitivity level (MSL) requirements and IPC Class 2 assembly standards for evaluation use.