Analog Devices Inc. ADL5374ACPZ-R2

Overview

ADL5374ACPZ-R2 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 output power at 3500 MHz, −159.6 dBm/Hz noise floor, −50 dBc sideband suppression, and supports >500 MHz 3 dB baseband bandwidth with 5 V single supply. It serves as the RF modulation stage in WiMAX base stations and satellite modem transmit chains.

For engineers reviewing the ADL5374ACPZ-R2 datasheet, ADL5374ACPZ-R2 pinout, ADL5374ACPZ-R2 application, or ADL5374ACPZ-R2 equivalent, key selection criteria include LO frequency range (3–4 GHz), carrier feedthrough (−32.8 dBm @ 3500 MHz), I/Q amplitude balance (0.015 dB), quadrature error (0.25°), and 24-lead LFCSP_VQ package compatibility with high-density RF layouts.

Technical Context

The ADL5374ACPZ-R2 integrates a polyphase LO quadrature splitter, voltage-to-current (V-to-I) converters for differential baseband inputs (IBBP/IBBN/QBBP/QBBN), dual Gilbert-cell mixers, and an on-chip balun for single-ended RF output (VOUT). Its architecture enables precise I/Q signal combination without external phase-shifting components.

It operates with 500 mV dc common-mode bias on all four baseband inputs, requires differential LO drive (−6 to +6 dBm), and uses five dedicated VPSx supply pins decoupled individually to maintain RF linearity across temperature (−40°C to +85°C). The exposed paddle must be soldered to ground for thermal and electrical stability.

Key Specifications

Pinout & Package

ADL5374ACPZ-R2 is housed in a 24-lead, 4 mm × 4 mm, RoHS-compliant LFCSP_VQ package with exposed thermal paddle. Pin layout follows standardized RF modulator topology: dual differential LO inputs (LOIP/LOIN), four differential baseband inputs (IBBP/IBBN/QBBP/QBBN), single-ended RF output (VOUT), five supply pins (VPS1–VPS5), and four common-ground terminals (COM1–COM4).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADL5375ACPZ-R7 and TRF3705IRGZT, ADL5374ACPZ-R2 uniquely balances 3–4 GHz coverage, −159.6 dBm/Hz noise floor, and 24-lead LFCSP_VQ thermal efficiency - making it the only option qualified for production WiMAX and satellite uplink designs requiring simultaneous high linearity and compact layout.

Availability

ADL5374ACPZ-R2 is available at Aetrix Electronics and suitable for WiMAX infrastructure, satellite communications, and broadband wireless access systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADL5374ACPZ-R2 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 manufacturing and design centers worldwide.

The ADL5374ACPZ-R2 belongs to Analog Devices' fixed-gain quadrature modulator (F-MOD) family, engineered specifically for broadband zero-IF and low-IF-to-RF upconversion in wireless infrastructure where phase accuracy, amplitude balance, and noise floor are critical.

FAQ

What is the recommended LO drive level for ADL5374ACPZ-R2?

The ADL5374ACPZ-R2 specifies −6 dBm to +6 dBm differential LO drive, with typical characterization at 0 dBm using a Johanson Technology 3600BL14M050 balun. Increasing LO drive to +6 dBm improves noise floor by ~0.5 dB but degrades second-order distortion; operation below 0 dBm is acceptable with minor noise penalty. ADL5374ACPZ-R2 requires differential LO input - single-ended drive causes measurable IP2 degradation.

How is baseband biasing implemented for ADL5374ACPZ-R2?

ADL5374ACPZ-R2 requires 500 mV dc common-mode bias on all four differential baseband inputs (IBBP/IBBN/QBBP/QBBN), with nominal ac swing of 700 mV p-p per pin (1.4 V p-p differential). This is typically achieved using 50 Ω resistors to ground from DAC outputs (e.g., AD9779), which convert 10 mA average current to 500 mV bias. The ADL5374ACPZ-R2 does not self-bias - external biasing is mandatory.

Can ADL5374ACPZ-R2 be used outside its specified 3–4 GHz range?

No - ADL5374ACPZ-R2 is characterized and guaranteed only from 3000 MHz to 4000 MHz. Performance parameters including output power, sideband suppression, and carrier feedthrough degrade significantly outside this band. For 2.7–3.8 GHz applications, Analog Devices recommends ADL5372; for 4.2–6 GHz, ADL5377 is specified. ADL5374ACPZ-R2 is not validated for operation below 3000 MHz or above 4000 MHz.

What thermal management is required for ADL5374ACPZ-R2?

ADL5374ACPZ-R2 requires soldering of its exposed paddle to a multilayer ground plane using ≥9 thermal vias to maintain junction temperature ≤110°C at maximum ambient (+85°C) and full power. θJA is 54°C/W when properly mounted. Inadequate paddle grounding causes >20°C junction rise and accelerated degradation of sideband suppression and noise floor. ADL5374ACPZ-R2 thermal design must follow AN-772 guidelines.

Does ADL5374ACPZ-R2 support digital carrier feedthrough nulling?

ADL5374ACPZ-R2 supports analog carrier feedthrough nulling only - via external adjustment of DC offsets on IBBP/IBBN and QBBP/QBBN pins. It does not include integrated DACs or digital registers for closed-loop nulling. Systems requiring dynamic nulling must implement external DACs (e.g., AD5662) to inject programmable offsets; ADL5374ACPZ-R2 provides the analog interface but no digital control interface.