Analog Devices Inc. AD8353-EVALZ

Overview

AD8353-EVALZ from Analog Devices is an evaluation board for the AD8353 broadband RF gain block, designed to validate performance of this 20 dB fixed-gain amplifier across 1 MHz–2.7 GHz in real RF signal chains. It supports both 3 V (with optional 100 nH RF choke) and 5 V operation, delivers up to 9 dBm linear output power, features internal 50 Ω input/output matching, and enables rapid prototyping of VCO buffers, Tx/Rx amplifiers, and PA predrivers.

For engineers reviewing the AD8353-EVALZ datasheet, AD8353-EVALZ pinout, AD8353-EVALZ application, or AD8353-EVALZ equivalent, this board provides verified reference design, component-level layout guidance, calibrated S-parameter measurement access, and configurable biasing-critical for validating gain flatness, OIP3, noise figure, and reverse isolation before integration into cellular, CATV, or LMDS RF subsystems.

Technical Context

The AD8353-EVALZ implements a complete test platform for the AD8353 RF gain block, featuring single-ended 50 Ω SMA input/output interfaces, on-board decoupling (100 pF + 0.47 µF at VPOS), and jumper-selectable 3 V/5 V supply routing. It incorporates the CP-8-23 LFCSP package with exposed paddle grounding per Analog Devices' thermal and RF stability requirements.

Board-level design includes AC-coupling capacitors (1000 pF) on RFIN and RFOUT, optional 100 nH RF choke (L1) for 3 V operation to boost collector voltage, and precise ground plane partitioning to minimize parasitic coupling-enabling accurate characterization of S-parameters, P1dB, OIP3, and NF across temperature and supply conditions.

Key Specifications

Availability

AD8353-EVALZ is available at Aetrix Electronics and suitable for RF front-end validation, wireless transceiver development, and broadband amplifier characterization requiring stable component supply, traceable calibration, and manufacturer-verified reference design fidelity.

Supply support for AD8353-EVALZ 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 RF ICs, serving precision instrumentation, communications, and industrial markets since 1965.

The AD8353-EVALZ belongs to Analog Devices' RF Amplifier Evaluation Platform family, engineered to accelerate time-to-test for broadband gain blocks used in cellular infrastructure, broadband access, and microwave communication systems.

FAQ

What is the primary purpose of the AD8353-EVALZ?

The AD8353-EVALZ is a fully assembled evaluation board designed exclusively to characterize and validate the AD8353 broadband RF gain block. It provides SMA-connected input/output paths, configurable 3 V/5 V biasing, proper RF decoupling, and thermal grounding-enabling engineers to measure gain, OIP3, noise figure, and return loss without custom PCB development.

Does the AD8353-EVALZ support both 3 V and 5 V operation of the AD8353?

Yes, the AD8353-EVALZ supports both supply configurations: 5 V operation requires no external RF choke, while 3 V operation uses the onboard 100 nH inductor (L1) between VPOS and RFOUT to maintain optimal collector bias and linear output power. Jumper settings and schematic documentation guide correct setup for each mode.

How is the AD8353 mounted on the AD8353-EVALZ board?

The AD8353 is mounted in its native CP-8-23 lead frame chip scale package (2 mm × 3 mm), with all eight terminals-including COM1, COM2, RFIN, RFOUT, VPOS, and NC pins-soldered per JEDEC standards. The exposed thermal paddle is fully soldered to the PCB ground plane to ensure low thermal resistance (θJA = 80°C/W) and RF stability.

Can the AD8353-EVALZ be used for low-frequency applications below 100 MHz?

Yes-the AD8353-EVALZ can operate down to 1 MHz as specified for the AD8353. For sub-100 MHz use, the 1000 pF AC-coupling capacitors (C1/C2) remain effective; Figure 40 in the AD8353 datasheet confirms flat gain from 300 kHz to 100 MHz at 5 V, validating the board's low-frequency capability without modification.

Where are the test points and measurement access points located on the AD8353-EVALZ?

The AD8353-EVALZ provides direct SMA-connected RF access at input (RFIN) and output (RFOUT), plus dedicated test points for VPOS supply voltage and ground. No additional probe points are needed-the board is optimized for vector network analyzer (VNA) and spectrum analyzer measurements using standard 50 Ω cables, with minimal launch parasitics due to controlled-impedance traces.