Analog Devices Inc. ADL5375-15-EVALZ

Overview

ADL5375-15-EVALZ from Analog Devices is a lead-free evaluation board for the ADL5375-15 broadband quadrature modulator IC, supporting RF output frequencies from 400 MHz to 6 GHz. It enables direct RF modulation in zero-IF and low-IF transmitter architectures, with verified performance at 900 MHz (sideband suppression ≤−49.9 dBc), 2150 MHz (carrier feedthrough ≤−34.2 dBm), and 3500 MHz (output return loss ≤−19.4 dB), targeting LTE/WiMAX base station and broadband wireless access design validation.

For engineers reviewing the ADL5375-15-EVALZ datasheet, ADL5375-15-EVALZ pinout, ADL5375-15-EVALZ application, or ADL5375-15-EVALZ equivalent, this page delivers verified board-level specifications, thermal layout guidance, RF calibration procedures, and compatibility notes for interfacing with ADF4350 PLLs and high-speed DACs in multiband transceiver development.

Technical Context

The ADL5375-15-EVALZ implements a single-ended LO input architecture with differential I/Q baseband inputs biased at 1500 mV DC, optimized for use with the ADL5375-15 modulator IC in 24-lead LFCSP_VQ package. It supports full characterization of RF output disable (DSOP) functionality, including 84 dB off-isolation and 100 ns turn-off settling time.

Board-level design includes dual 0.1 µF + 100 pF bypassing per VPS1/VPS2 supply pin, exposed paddle grounding via low-impedance thermal vias, and 50 Ω RFOUT ac-coupling to SMA connector - all aligned with Analog Devices' recommended layout for minimizing LO leakage (<−53 dBm at 2150 MHz) and maintaining <0.21° quadrature error across 450–4500 MHz.

Key Specifications

Availability

ADL5375-15-EVALZ is available at Aetrix Electronics and suitable for LTE base station prototyping, WiMAX transceiver validation, satellite modem development, and broadband digital predistortion testing requiring stable component supply and traceable evaluation hardware sourcing.

Supply support for ADL5375-15-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 integrated circuits, headquartered in Norwood, MA, with over 50 years of innovation in signal processing and precision conversion technologies.

The ADL5375-15-EVALZ belongs to Analog Devices' RF Transceiver & Modulator Evaluation Platform product line, engineered specifically to accelerate RF front-end design verification for wideband wireless infrastructure applications operating across sub-1 GHz to 6 GHz bands.

FAQ

What is the primary function of the ADL5375-15-EVALZ?

The ADL5375-15-EVALZ is an evaluation board designed exclusively for the ADL5375-15 broadband quadrature modulator IC. It provides a fully populated, calibrated platform to characterize RF output performance-including sideband suppression, carrier feedthrough, and output P1dB-across 400 MHz to 6 GHz while validating interface behavior with external DACs, PLLs, and power supplies. The ADL5375-15-EVALZ does not operate as a standalone modulator; it requires the mounted ADL5375-15 IC to function.

Can the ADL5375-15-EVALZ be used with the ADL5375-05 modulator IC?

No. The ADL5375-15-EVALZ is configured for 1500 mV baseband input bias and is not compatible with the ADL5375-05, which requires 500 mV bias. Component placement, decoupling network tuning, and reference voltage routing on the ADL5375-15-EVALZ are specific to the ADL5375-15's electrical interface. Substituting the ADL5375-05 would result in incorrect biasing, degraded sideband suppression (>−38 dBc), and potential damage due to mismatched input common-mode levels.

What RF output connector type is used on the ADL5375-15-EVALZ?

The ADL5375-15-EVALZ uses a standard SMA female connector for the RFOUT signal path, directly coupled from the ADL5375-15's single-ended 50 Ω output via a series ac-coupling capacitor. This connector supports full-bandwidth measurement up to 6 GHz and is impedance-matched per Analog Devices' layout guidelines in the ADL5375 datasheet Rev. D, Figure 30 and Section "Evaluation Board".

Does the ADL5375-15-EVALZ include onboard power regulation?

No. The ADL5375-15-EVALZ requires an external 4.75 V–5.25 V DC supply connected to its VPS1/VPS2 pins. It features dual-stage local bypassing (0.1 µF ceramic + 100 pF ceramic per supply pin) but no voltage regulators or DC/DC converters. Power sequencing and ripple control must be managed externally to maintain specified supply current (126–127 mA active, 194–203 mA disabled) and avoid degradation in noise floor (−157.9 dBm/Hz at 2150 MHz) or IP3 performance.

How is thermal performance ensured on the ADL5375-15-EVALZ?

Thermal performance on the ADL5375-15-EVALZ is ensured by soldering the ADL5375-15's exposed paddle directly to a solid ground plane using multiple thermal vias, achieving θJA = 54°C/W per JESD 51-2. The board layout follows Analog Devices' recommendations in the ADL5375 datasheet Rev. D, Section "Thermal Grounding and Evaluation Board Layout", enabling reliable operation across −40°C to +85°C ambient without derating. No heatsink or forced-air cooling is required under nominal conditions.