Analog Devices Inc. ADL5374ACPZ-WP

Overview

ADL5374ACPZ-WP from Analog Devices is a fixed-gain quadrature modulator operating from 3000 MHz to 4000 MHz, designed for direct RF upconversion in broadband wireless transmitters. It delivers 5.4 dBm typical output power at 3500 MHz, −50 dBc sideband suppression, and −32.8 dBm carrier feedthrough, enabling high-fidelity WiMAX and satellite modem signal generation.

For engineers reviewing the ADL5374ACPZ-WP datasheet, ADL5374ACPZ-WP pinout, ADL5374ACPZ-WP application, or ADL5374ACPZ-WP equivalent, key selection criteria include its 500 MHz baseband bandwidth, 24-lead LFCSP_VQ package with exposed paddle, single 5 V supply operation, and differential I/Q input interface requiring 500 mV dc bias and 1.4 V p-p differential swing.

Technical Context

The ADL5374ACPZ-WP integrates a polyphase LO quadrature splitter, voltage-to-current (V-to-I) converters for differential baseband inputs, dual Gilbert-cell mixers, and an on-chip balun for differential-to-single-ended RF output conversion. Its architecture enables precise amplitude balance (0.012 dB typ. at 3300 MHz) and phase accuracy (0.1° quadrature error typ. at 3300 MHz).

It operates with differential LO drive (−6 dBm to +6 dBm), accepts high-impedance differential baseband inputs (2900 kΩ), and features internal bias generation referenced to a bandgap PTAT current source. Performance is specified across −40°C to +85°C with 4.75 V–5.25 V supply.

Key Specifications

Pinout & Package

ADL5374ACPZ-WP is housed in a 24-lead, 4 mm × 4 mm, RoHS-compliant LFCSP_VQ package with exposed thermal paddle. The package requires low-impedance grounding of COM1–COM4 pins and the exposed paddle via ≥9 vias for optimal thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quadrature modulator applications.

Compared with ADL5375ACPZ-WP and TRF3705IRGZT, ADL5374ACPZ-WP delivers the highest sideband suppression and best phase/amplitude accuracy in the 3–4 GHz band, making it optimal for licensed-spectrum infrastructure where spectral purity is mandated.

Availability

ADL5374ACPZ-WP is available at Aetrix Electronics and suitable for WiMAX base stations, satellite modems, broadband wireless access nodes, and RF test equipment requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for ADL5374ACPZ-WP 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, headquartered in Norwood, MA, with design centers worldwide and manufacturing in advanced SiGe and CMOS processes.

The ADL5374ACPZ-WP belongs to Analog Devices' fixed-gain quadrature modulator (F-MOD) family, engineered specifically for high-efficiency, high-linearity direct RF upconversion in 3–4 GHz licensed wireless infrastructure and aerospace communications systems.

FAQ

What is the recommended LO drive level for ADL5374ACPZ-WP?

The ADL5374ACPZ-WP is characterized with 0 dBm differential LO drive using a Johanson Technology 3600BL14M050 balun. LO drive can range from −6 dBm to +6 dBm; increasing drive improves noise floor slightly but does not affect sideband suppression or carrier feedthrough significantly. Single-ended LO drive is not recommended as it degrades second-order distortion by >10 dB.

Does ADL5374ACPZ-WP require external DC biasing on its baseband inputs?

Yes, ADL5374ACPZ-WP baseband inputs (IBBP, IBBN, QBBP, QBBN) are not self-biased and require an external 500 mV dc common-mode bias. This is typically implemented using 50 Ω resistors to ground when interfacing with current-output DACs like the AD9779. The input bias current is 45 μA per pin, and the differential input impedance is 2900 kΩ.

What is the function of the exposed paddle on the ADL5374ACPZ-WP package?

The exposed paddle on the ADL5374ACPZ-WP serves as the primary thermal and electrical ground path. It must be soldered to a low-impedance ground plane using ≥9 vias. Proper paddle grounding ensures junction temperature remains within −40°C to +85°C operating limits and maintains RF performance stability, especially for sideband suppression and noise floor.

Can ADL5374ACPZ-WP operate outside its specified 3000–4000 MHz RF range?

No, ADL5374ACPZ-WP is optimized and characterized only for 3000–4000 MHz RF output. Operation below 3000 MHz or above 4000 MHz results in degraded sideband suppression (<−40 dBc), increased carrier feedthrough (>−25 dBm), and reduced output power. For broader frequency coverage, consider ADL5375ACPZ-WP (1500–4000 MHz) instead.

How is carrier feedthrough minimized in ADL5374ACPZ-WP?

Carrier feedthrough in ADL5374ACPZ-WP is minimized through iterative dc offset adjustment on the I and Q baseband inputs. With no offset, typical carrier feedthrough is −32.8 dBm at 3500 MHz; applying controlled voltage offsets (e.g., ±300 µV) can reduce it to near the noise floor (−159.6 dBm/Hz). The process requires maintaining 500 mV common-mode bias while varying differential offsets independently per channel.