Analog Devices Inc. DC795A

Overview

The DC795A from Analog Devices is a demonstration board designed to evaluate the LT5527 high-linearity, broadband downconverting mixer IC in cable and wireless infrastructure receiver/transmitter systems. It supports RF input from 1.7GHz to 2.7GHz, IF output centered at 240MHz, LO range of 1200MHz–4000MHz, operates from a single 5V supply, and features integrated 50Ω LO matching and transformer-coupled RF input.

For engineers reviewing the DC795A datasheet, DC795A pinout, DC795A application, or DC795A equivalent, this demo board enables rapid validation of mixer conversion gain, IIP3, LO-to-IF leakage, and high-signal-level performance under real-world test configurations with minimal external components.

Technical Context

The DC795A implements the LT5527 as a fully assembled, impedance-matched evaluation platform with calibrated RF/LO/IF ports, on-board enable control (TP1), and optimized layout for repeatable S-parameter and distortion measurements. It includes no active components beyond the LT5527 IC and passive matching networks.

Test setup support includes explicit single-tone and two-tone measurement procedures covering conversion gain, 1dB compression, IIP3 calculation (P1, P3, Gc), LO leakage, and harmonic suppression - all referenced to standardized 50Ω terminations and defined center frequencies (e.g., 240MHz IF, 2140MHz/1660MHz LO).

Key Specifications

Availability

DC795A is available at Aetrix Electronics and suitable for cable headend receivers, LTE/FDD/TDD base station transceivers, microwave backhaul IF stages, and broadband spectrum analyzer front-ends requiring stable component supply and proven RF evaluation infrastructure.

Supply support for DC795A 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. is a global semiconductor company specializing in high-performance analog, mixed-signal, and RF technologies for precision signal processing applications.

The DC795A belongs to Analog Devices' Linear Technology demo board product line, engineered to accelerate RF system validation by providing production-grade layouts, calibrated interfaces, and application-specific test methodologies for critical signal chain components like mixers.

FAQ

What is the primary function of the DC795A demo board?

The DC795A demo board is a ready-to-use evaluation platform for the LT5527 downconverting mixer IC. It enables engineers to measure key RF performance metrics-including conversion gain, IIP3, LO-to-IF leakage, and 1dB compression-under controlled, repeatable conditions. The DC795A provides pre-matched 50Ω RF, LO, and IF ports, onboard enable control, and documented test procedures aligned with industry-standard mixer characterization methods.

Does the DC795A support both high-side and low-side LO injection?

Yes, the DC795A supports both high-side and low-side LO injection as specified in its Quick Start Guide. For a 240MHz IF output and 1900MHz RF input, it validates operation with LO frequencies of 2140MHz (high-side) or 1660MHz (low-side). The board's LT5527 implementation maintains consistent port matching and isolation across both configurations without hardware modification.

What power supply requirements does the DC795A have?

The DC795A requires a single 5V DC supply with a current limit set to 100mA, as specified in its test procedures. Power is delivered to the LT5527's VCC1 and VCC2 pins, and the enable function is controlled via TP1, which must be connected to 5V to activate the mixer. No additional voltage rails or bias sequencing are needed.

Can the DC795A be used outside its nominal 1.7–2.7GHz RF range?

Yes - the DC795A's RF input match can be extended below 1.7GHz down to 400MHz or above 2.7GHz up to 3.7GHz using a single external shunt capacitor or inductor, respectively, per the LT5527 datasheet. The board includes footprint space and routing access for such modifications, preserving its utility for adjacent band evaluations.

Is the DC795A compatible with standard RF test equipment?

Yes, the DC795A is fully compatible with standard RF test equipment including signal generators, spectrum analyzers, and DC power supplies. Its RF, LO, and IF ports are SMA-female and 50Ω-terminated; test setup diagrams (Figures 2 and 3) define exact instrument connections, power levels, and measurement centers - enabling immediate integration into lab validation workflows without adapter or calibration overhead.