Analog Devices Inc. DC2483A-B

Overview

DC2483A-B from Analog Devices is a standard evaluation board designed specifically for the LTC5562 low-power wideband active mixer IC in downconverting configurations. It supports RF input frequencies up to 7GHz (e.g., 5.8GHz IN), LO injection from 4.9GHz, and delivers 800MHz IF output with +2dB conversion gain, +14dBm OIP3, and 14.6dB noise figure at 25°C. The board uses Rogers RO4003C laminate, 8:1 wire-wound balun (TC8-1-10LN+), and full 0402 passive component layout per Figure 2 of the LTC5562 datasheet.

For engineers reviewing the DC2483A-B datasheet, DC2483A-B schematic, DC2483A-B layout, or DC2483A-B test setup, this evaluation board enables rapid validation of downconversion performance-including LO-to-IF leakage (<–45dBm), IN-to-OUT isolation (44dB), and supply current scalability (15–40mA via LGND resistor)-in wireless infrastructure, portable test instruments, and fixed wireless access applications.

Technical Context

The DC2483A-B implements the exact downconverting test circuit shown in Figure 2 of the LTC5562 datasheet, configured for f_IN = 5.8GHz, f_LO = 4.9GHz, f_OUT = 800MHz using low-side LO injection. It integrates Mini-Circuits TCM1-83X+ (1:1) and TCM4-19 (4:1) transformers, 0402 Murata GRM/GJM capacitors, and Coilcraft 0402HP inductors to achieve broadband impedance matching across 5.1–6.1GHz input and 700–900MHz output bands.

This board provides validated reference design for evaluating critical mixer behaviors under real-world conditions: LO impedance match retention during EN pin shutdown, differential input/LO drive flexibility, and LGND-resistor-based current tuning (20mA with R1 = 34Ω). All external components are specified per datasheet Table 13, ensuring reproducible SSB noise figure (14.6dB) and two-tone IIP3 (–22dBm).

Key Specifications

Availability

DC2483A-B is available at Aetrix Electronics and suitable for wireless infrastructure, portable test instrumentation, and fixed wireless access equipment requiring stable component supply and production-ready RF evaluation capability.

Supply support for DC2483A-B 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 (ADI) is a global leader in high-performance analog, mixed-signal, and RF ICs, acquired Linear Technology in 2017 to expand its precision signal chain portfolio.

The DC2483A-B belongs to ADI's evaluation board product line, engineered to accelerate development of wideband RF receivers using the LTC5562 mixer-targeting applications demanding low power, high linearity, and flexible up/downconversion in compact form factors.

FAQ

What is the primary function of the DC2483A-B evaluation board?

The DC2483A-B evaluation board is a fully assembled, production-tested platform for characterizing the LTC5562 mixer in downconverting mode. It implements the exact circuit from Figure 2 of the LTC5562 datasheet-supporting 5.8GHz RF input, 4.9GHz LO, and 800MHz IF output-with calibrated performance for conversion gain (+2dB), OIP3 (+14dBm), and noise figure (14.6dB). DC2483A-B enables immediate lab validation without custom PCB design.

Which frequency bands does DC2483A-B support for downconversion testing?

DC2483A-B is optimized for downconversion from 5.1–6.1GHz RF input to 700–900MHz IF output, with full characterization at 5.8GHz IN → 800MHz OUT. Its Mini-Circuits TCM1-83X+ (1:1) and TCM4-19 (4:1) transformers, plus Murata 0402 GRM/GJM passives, maintain impedance match and low loss across this band. Performance data for DC2483A-B is documented in the LTC5562 datasheet Figures 2 and G24–G32.

How is power consumption adjusted on the DC2483A-B board?

Power consumption on DC2483A-B is adjusted by replacing the default 0Ω resistor (R1) between LGND (Pin 10) and ground with an external resistor-e.g., 34Ω reduces total current to ~20mA. This directly scales the LTC5562's tail current while preserving conversion gain and linearity within datasheet limits. DC2483A-B's layout includes dedicated pads for R1 placement, enabling quick current optimization without redesign.

Does DC2483A-B support differential or single-ended signal interfaces?

DC2483A-B supports both: RF input and LO are routed for single-ended 50Ω SMA connections (per datasheet Figure 2), while the LTC5562's internal differential architecture remains accessible via test points. The board's output is differential but converted to single-ended 50Ω via the TCM4-19 balun. All critical nodes-including IN+, IN–, LO+, LO–, OUT+, OUT–, and LGND-are exposed for probing or reconfiguration.

Is DC2483A-B compatible with other LTC5562 evaluation boards like DC2483A-A?

Yes-DC2483A-B shares the same core LTC5562 footprint, power delivery, and enable/shutdown control as DC2483A-A, differing only in transformer selection (TC8-1-10LN+ vs NCS4-442+) and passive tuning for downconversion vs upconversion. Both use identical Rogers RO4003C stack-up and 0402 component placement, allowing direct comparison of up/down performance using the same test setup and calibration procedures.