Analog Devices Inc. DC2322A

Overview

DC2322A from Analog Devices (formerly Linear Technology) is an evaluation board for the LTC5576 high-linearity active upconverting mixer IC, supporting 3GHz–8GHz RF output frequencies with –0.6dB conversion gain, 25dBm OIP3, 14.1dB noise figure at 5.8GHz, and single-ended LO input requiring only 0dBm drive - deployed in 5G wireless infrastructure transmitters and fixed wireless access equipment.

For engineers reviewing the DC2322A datasheet, DC2322A pinout, DC2322A application, or DC2322A equivalent, this page delivers verified layout details, frequency-band-optimized component values (e.g., C3 = 0.2pF @ 5.8GHz), thermal management guidance for the exposed-pad QFN, supply ramping requirements, and test circuit validation against LTC5576's AC/DC specifications across 5V/3.3V operation.

Technical Context

The DC2322A implements a calibrated reference design for the LTC5576 mixer IC, featuring a NELCO 4000-13EP 4-layer PCB stack-up with controlled-impedance 50Ω RF traces, optimized external matching networks (including Mini-Circuits AT224-1 1:1 balun), and precision-selected passive components (e.g., Murata GRM capacitors, Coilcraft HP inductors) to achieve specified performance across 3.5GHz, 5.8GHz, and 8GHz output bands.

It supports both 5V (R1 = 2.61kΩ) and 3.3V (R1 = 649Ω) bias configurations, integrates thermal vias under the exposed pad for die temperature monitoring via the TEMP pin, and provides dedicated test points (TP, EN, IADJ) for real-time characterization of enable timing (0.6µs turn-on/off), current adjustment, and LO leakage suppression (≤–35dBm).

Key Specifications

Availability

DC2322A is available at Aetrix Electronics and suitable for 5G base station development, fixed wireless access (FWA) equipment prototyping, and millimeter-wave repeater design requiring stable component supply, traceable sourcing, and lifecycle continuity.

Supply support for DC2322A 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 acquired Linear Technology in 2017 and maintains its high-performance RF product portfolio, including precision mixers, synthesizers, and signal chain solutions for demanding wireless infrastructure applications.

The DC2322A belongs to Linear Technology's evaluation board family designed specifically to accelerate time-to-test for broadband RF ICs like the LTC5576, enabling rapid validation of upconversion linearity, noise floor, and LO suppression in real-world 5G and FWA system environments.

FAQ

What is the primary function of the DC2322A evaluation board?

The DC2322A evaluation board is a fully assembled and tested platform for characterizing the LTC5576 high-linearity active upconverting mixer IC. It provides validated RF layout, band-specific matching components (e.g., C3 = 0.2pF for 5.8GHz), thermal management, and test points to evaluate conversion gain, OIP3, noise figure, and LO leakage without custom PCB development. The DC2322A directly supports engineering validation of the LTC5576 in 5G and fixed wireless systems.

Which output frequency bands does the DC2322A support out-of-the-box?

The DC2322A supports three discrete output frequency bands: 3.5GHz, 5.8GHz, and 8GHz - each with pre-populated, optimized external matching components. For 5.8GHz operation, it uses C3 = 0.2pF and zero-ohm jumper for L1; for 8GHz, it substitutes L1 = 1nH and retains C3 = 0.2pF. These configurations are documented in the LTC5576 datasheet (page 13) and ensure compliance with the IC's specified AC performance across temperature and supply voltage.

How does the DC2322A handle power supply configuration for the LTC5576?

The DC2322A supports both 5V and 3.3V operation of the LTC5576 via configurable R1 bias resistors: 2.61kΩ for 5V (99mA typical supply current) and 649Ω for 3.3V (85mA). Each configuration includes dedicated 10nF and 1µF local bypassing per VCC pin, and the board's layout routes VCC pins 6 and 7 together as specified in the LTC5576 pinout. This dual-supply flexibility allows direct correlation of DC2322A measurements with the IC's published 5V/3.3V AC electrical characteristics.

Does the DC2322A provide thermal monitoring capability for the LTC5576?

Yes - the DC2322A implements the LTC5576's integrated temperature sensing diode via the TEMP pin (Pin 1), with routing and test point access enabling direct measurement of die temperature using a constant-current source. The exposed pad (Pin 17) is fully soldered to the PCB ground plane with thermal vias, satisfying the datasheet requirement for thermal conduction. This allows engineers to correlate measured SSB noise figure drift (–0.009dB/°C) and OIP3 variation with actual junction temperature during DC2322A testing.

Can the DC2322A be used for downconversion applications despite being optimized for upconversion?

While the DC2322A is configured and characterized for upconversion (e.g., fIN = 900MHz → fOUT = 5.8GHz), its broadband IN port (30MHz–6GHz) and single-ended LO input permit downconversion use with appropriate external re-matching. However, no factory-validated downconversion component values or performance data are provided for the DC2322A; users must recalculate balun termination, C3/L1 values, and verify isolation (IN-to-LO >35dB, IN-to-OUT >35dB) per their specific fLO/fIF plan - the DC2322A remains a reference platform for the LTC5576's upconverting role.