Analog Devices Inc. DC1027A

Overview

DC1027A from Analog Devices (formerly Linear Technology) is a demonstration circuit board built around the LT5560 low-power active mixer IC, designed for RF down-conversion testing in 79–300MHz RF input and 3–67MHz IF output bands with 12dB RF return loss. It supports single-ended LO drive at –2dBm, delivers 2.7dB conversion gain, and operates from 2.7V to 5.3V supply voltage.

For engineers reviewing the DC1027A datasheet, DC1027A pinout, DC1027A application, or DC1027A equivalent, this page provides verified board-level performance data, measured distortion metrics (IIP3 = +9.6dBm, IIP2 = +46dBm), noise figure (8.8dB), LO leakage (–63dBm LO-to-RF), and up/down-conversion configuration guidance for HF/VHF test setups.

Technical Context

DC1027A implements the LT5560 as a double-balanced active mixer with external impedance-matching networks optimized for 79–300MHz RF input and 176–316MHz LO frequency ranges. Its design enables both down-conversion (e.g., 250MHz RF → 9/10MHz IF) and up-conversion operation using the same core IC.

The board uses resistor R1 (3Ω default) to set supply current at 10mA for optimal linearity; reducing current degrades IIP3 and increases noise figure. All signal ports (RF, LO, IF) are 50Ω matched via discrete external components, achieving ≥15dB return loss across operating bands when properly terminated.

Key Specifications

Availability

DC1027A is available at Aetrix Electronics and suitable for RF test bench validation, VHF receiver front-end characterization, and low-power transceiver development requiring stable component supply and documented mixer performance benchmarks.

Supply support for DC1027A 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 semiconductor leader specializing in high-performance analog, mixed-signal, and RF technologies for precision signal processing applications.

The DC1027A belongs to ADI's Linear Technology demonstration circuit portfolio, engineered to accelerate RF system prototyping and provide reference-grade measurement data for active mixer ICs in communications and instrumentation designs.

FAQ

What is the primary function of the DC1027A demonstration circuit?

The DC1027A demonstration circuit is a fully assembled and tested evaluation platform for the LT5560 active mixer IC. It enables rapid characterization of down-conversion performance-including conversion gain, noise figure, and intermodulation distortion-in the 79–300MHz RF band. DC1027A is not a standalone IC but a ready-to-use board with calibrated matching networks and test points for lab validation of DC1027A's specified RF/LO/IF behavior.

Does DC1027A support up-conversion applications?

Yes, DC1027A supports up-conversion applications per its Quick Start Guide, which states it "can also be optimized for HF, VHF up-converting applications." The LT5560 IC on DC1027A is inherently bidirectional; up-conversion is enabled by routing the IF signal to the RF port and the LO to its designated port, with appropriate external matching. DC1027A's layout and component selection accommodate both modes without hardware modification.

What supply voltage and current does DC1027A require for nominal operation?

DC1027A operates from a 2.7V to 5.3V DC supply, with nominal performance characterized at 3V and 10mA supply current (set by R1 = 3Ω). At 3V, the EN pin must be pulled high to enable the LT5560. Shutdown current drops to 10µA when EN is held at ≤0.3V. DC1027A's current adjustability allows trade-offs between power consumption and linearity-reducing current below 10mA degrades IIP3.

How is RF/LO/IF port matching implemented on DC1027A?

DC1027A achieves ≥15dB return loss on RF, LO, and IF ports using discrete external matching networks-not integrated baluns or transformers. These networks consist of surface-mount capacitors and inductors selected for the 79–300MHz RF and 176–316MHz LO bands. Matching is optimized for 50Ω terminations; users must maintain proper 50Ω source/load conditions during measurement to replicate DC1027A's published return loss and conversion gain specs.

Can DC1027A be used to measure second-order distortion (IM2)?

Yes, DC1027A supports IM2 measurement: the Quick Start Guide specifies measuring the 2nd-order product at 3MHz (e.g., 253MHz – 250MHz) using spectrum analyzer center frequency tuning. This exploits the board's improved output matching at 3MHz versus 1MHz. Measured IIP2 is +46dBm under 2-tone –20dBm conditions with PLO = –2dBm. DC1027A's layout and component values preserve signal integrity at low IF frequencies required for accurate IM2 assessment.