Analog Devices Inc. DC2496A

Overview

DC2496A from Analog Devices is an evaluation board designed to demonstrate the performance of the LTC6432-15 ultra-high-linearity differential IF amplifier. It enables full-bandwidth (100kHz–1.4GHz) characterization of OIP3, noise figure, and gain flatness into 100Ω differential loads, supporting ADC driver validation in high-dynamic-range RF receiver chains.

For engineers reviewing the DC2496A datasheet, DC2496A pinout, DC2496A application, or DC2496A equivalent, this board provides a production-ready reference design with calibrated balun interfaces, optimized RF choke networks, and verified thermal management for repeatable lab and benchtop testing of wideband differential amplifiers.

Technical Context

The DC2496A implements Test Circuit A from the LTC6432-15 datasheet, featuring dual 1:2 baluns to convert between 50Ω single-ended test equipment and the amplifier's native 100Ω differential I/O. It integrates precision-matched 240nH/470µH RF choke stages with de-Qing resistors (250Ω/280Ω) to maintain flat gain across 13 octaves.

Board-level design includes X8R-class 1µF DC blocking capacitors at all six signal paths, 1000pF + 0.1µF VCC bypassing per supply pin, and dedicated NFILT1/NFILT2 filtering-ensuring low 1/f noise corner and stable operation from 100kHz while preserving the LTC6432-15's 54.5dBm OIP3 at 1MHz and 3.0dB NF at 240MHz.

Key Specifications

Availability

DC2496A is available at Aetrix Electronics and suitable for RF receiver development, high-speed ADC interface validation, and wideband test instrument calibration requiring stable component supply and traceable evaluation hardware.

Supply support for DC2496A 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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving communications, industrial, automotive, and instrumentation markets.

The DC2496A belongs to Analog Devices' Linear Technology evaluation board portfolio, engineered specifically to accelerate prototyping and characterization of ultra-linear RF gain blocks like the LTC6432-15 for demanding IF and ADC driver applications.

FAQ

What is the primary function of the DC2496A evaluation board?

The DC2496A evaluation board is a fully assembled and tested platform for characterizing the LTC6432-15 differential amplifier. It provides calibrated 50Ω SMA interfaces, optimized balun matching, and production-grade RF choke networks to validate key metrics-including OIP3, P1dB, noise figure, and gain flatness-across 100kHz to 1.4GHz without custom layout. The DC2496A directly implements the recommended Test Circuit A from the LTC6432-15 datasheet.

Does the DC2496A support both Grade A and Grade B variants of the LTC6432-15?

Yes, the DC2496A supports both LTC6432AIUF-15 and LTC6432BIUF-15 devices. Its layout accommodates the identical 24-lead 4mm × 4mm QFN package and maintains all critical impedance-controlled traces, bias networks, and thermal vias required for either grade. Performance validation-including guaranteed 47dBm minimum OIP3 at 150MHz for Grade A-is achievable using the same DC2496A hardware.

How does the DC2496A handle low-frequency stability below 100kHz?

The DC2496A incorporates the parallel 350Ω resistor + 1µF capacitor network on the input side as specified in the LTC6432-15 datasheet to suppress low-frequency instability. This network provides resistive loss at sub-100kHz frequencies where the internal feedback capacitor becomes ineffective, preventing gain peaking and impedance mismatch. The board uses X8R dielectric capacitors to avoid voltage-coefficient-induced distortion in this network.

Can the DC2496A be used with standard 50Ω test equipment?

Yes-the DC2496A is explicitly designed for compatibility with standard 50Ω vector network analyzers and signal generators. Dual 1:2 baluns convert the LTC6432-15's native 100Ω differential I/O to 50Ω single-ended ports, enabling direct S-parameter measurement, gain/flatness sweeps, and two-tone intermodulation testing without custom adapters or impedance-matching fixtures. All SMA connectors are grounded through the board's multi-layer stackup.

What thermal management features does the DC2496A include for the LTC6432-15?

The DC2496A implements full thermal compliance per the LTC6432-15 datasheet: the exposed pad (Pin 25) is soldered to an internal copper ground plane using ≥6 thermal vias, and the T_DIODE pin (Pin 15) is routed to a test point for real-time junction temperature monitoring. Board-level copper pour and via density ensure θJC ≤ 40°C/W, maintaining case temperatures within –40°C to +85°C during continuous 5V/195mA operation.