Analog Devices Inc. ADL5370ACPZ-R7

Overview

ADL5370ACPZ-R7 from Analog Devices is a fixed-gain quadrature modulator operating from 300 MHz to 1000 MHz, designed for direct RF upconversion in zero-IF and low-IF transmitters. It delivers 6.2 dBm typical SSB output power, −41 dBc sideband suppression at 450 MHz, and −160 dBm/Hz noise floor with 50 Ω single-ended RF output and differential baseband inputs.

For engineers reviewing the ADL5370ACPZ-R7 datasheet, ADL5370ACPZ-R7 pinout, ADL5370ACPZ-R7 application, or ADL5370ACPZ-R7 equivalent, this page provides verified functional context, validated pin-level circuit roles, confirmed RF performance metrics across temperature and supply, and real-world interface constraints for DAC-coupled broadband transmitters.

Technical Context

The ADL5370ACPZ-R7 integrates a polyphase LO quadrature splitter, high-linearity Gilbert-cell mixers, and a differential-to-single-ended amplifier with on-chip 50 Ω termination. Its V-to-I baseband interface accepts 1.4 V_p-p differential signals biased at 500 mV dc, enabling >500 MHz 3 dB modulation bandwidth.

Carrier feedthrough (−50 dBm) and sideband suppression (−41 dBc) are optimized via external dc offset tuning of I/Q baseband inputs; phase error is specified at 0.76° and amplitude balance at 0.03 dB - both critical for EVM-sensitive GSM and WiMAX systems.

Key Specifications

Pinout & Package

ADL5370ACPZ-R7 uses a 24-lead, exposed-paddle, Pb-free LFCSP_VQ package (4 mm × 4 mm × 0.85 mm). Thermal and electrical grounding of the exposed paddle is mandatory for specified RF performance and junction temperature control.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADL5370ACPZ-R7, ADL5371ACPZ-R7 extends usable frequency range while maintaining identical interface and calibration workflow, whereas TRF3705IRGZT trades pin compatibility for integrated LO functionality - making ADL5370ACPZ-R7 optimal for cost- and size-constrained 300–1000 MHz designs requiring proven DAC interoperability.

Availability

ADL5370ACPZ-R7 is available at Aetrix Electronics and suitable for cellular infrastructure, WiMAX CPE, satellite modems, and broadband test equipment requiring stable component supply, consistent RF performance across temperature, and long-term obsolescence management.

Supply support for ADL5370ACPZ-R7 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 ISO 9001-certified manufacturing.

The ADL5370ACPZ-R7 belongs to Analog Devices' F-MOD fixed-gain quadrature modulator family, engineered specifically for broadband zero-IF transmitters in wireless infrastructure and aerospace applications demanding low noise, high linearity, and repeatable calibration.

FAQ

What is the recommended LO drive level for ADL5370ACPZ-R7?

The ADL5370ACPZ-R7 is characterized at 0 dBm single-ended LO drive on LOIP, with LOIN ac-grounded. Drive levels from −7 dBm to +7 dBm are supported; increasing LO power to +7 dBm improves noise floor by ~3 dB at 6 MHz offset but degrades sideband suppression by ~3 dBc - use only when noise-limited, not distortion-limited.

Does ADL5370ACPZ-R7 require external baseband biasing?

Yes, ADL5370ACPZ-R7 does not include internal baseband biasing. All four differential inputs (IBBP, IBBN, QBBP, QBBN) must be externally biased to 500 mV dc using precision resistors or DAC common-mode control - deviation beyond 400–600 mV reduces usable ac swing and increases distortion.

Can ADL5370ACPZ-R7 be used with AD9779 DAC without level-shifting?

Yes, ADL5370ACPZ-R7 interfaces directly with AD9779's current-output DAC using 50 Ω resistors to ground on each output, establishing the required 500 mV dc bias and delivering 1.4 V_p-p differential swing - no level-shifter or op-amp buffer is needed per the AD9779 datasheet Figure 29 reference design.

What is the thermal requirement for ADL5370ACPZ-R7's exposed paddle?

The exposed paddle of ADL5370ACPZ-R7 must be soldered to a low-thermal-resistance ground plane with ≥9 vias; θ_JA is 54°C/W when properly mounted. Junction temperature must stay ≤159°C - at 205 mA and 5 V, power dissipation is ~1.025 W, requiring ≥18°C/W board-level thermal resistance for operation at +85°C ambient.

How is carrier feedthrough minimized in ADL5370ACPZ-R7?

Carrier feedthrough in ADL5370ACPZ-R7 is minimized by adjusting dc offsets on IBBP/IBBN and QBBP/QBBN inputs - typically using AD9779's auxiliary DACs - to null residual (VIOPP − VIOPN) and (VQOPP − VQOPN) mismatches. Nulling achieves −80 dBm feedthrough, limited only by output noise floor (−160 dBm/Hz).