Analog Devices Inc. ADG918BRMZ-REEL

Overview

ADG918BRMZ-REEL from Analog Devices is a wideband 2:1 RF multiplexer / SPDT switch optimized for high-isolation signal routing in wireless transceivers and tuner modules. It delivers 43 dB off-isolation at 1 GHz, 0.8 dB insertion loss at 1 GHz, and operates from a single 1.65 V to 2.75 V CMOS supply. Its absorptive architecture ensures 50 Ω matched shunt legs for minimal reflection in antenna diversity and T/R switching applications.

For engineers reviewing the ADG918BRMZ-REEL datasheet, ADG918BRMZ-REEL pinout, ADG918BRMZ-REEL application, or ADG918BRMZ-REEL equivalent, key selection criteria include its 4 GHz −3 dB bandwidth, sub-10 ns switching times, 17 dBm P−1 dB compression point, and compatibility with CMOS/LVTTL control logic in industrial temperature range (−40°C to +85°C).

Technical Context

The ADG918BRMZ-REEL implements an absorptive (matched) RF switch topology with internally terminated 50 Ω shunt legs on RF1 and RF2 ports, ensuring stable VSWR regardless of switch state. This eliminates external matching networks and prevents signal reflections back to sensitive sources like LNAs or power amplifiers.

Its on-board CMOS control logic accepts 1.65 V–2.75 V logic levels and drives the internal FET array without external biasing. The device achieves high isolation across dc–1 GHz via optimized layout and process design, with isolation degrading gradually beyond 1 GHz-reaching 36 dB at 1 GHz (RM package) and maintaining >30 dB up to 2 GHz.

Key Specifications

Pinout & Package

ADG918BRMZ-REEL is packaged in an 8-lead MSOP (RM-8), 3 mm × 3 mm footprint with exposed pad tied to GND. Pin 1 is marked by a dot; exposed pad must be soldered to PCB ground plane for thermal and RF performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RF switch applications.

Compared with ADG918BRMZ-REEL, ADG919BRMZ-REEL trades matched port behavior for slightly smaller die size and lower cost, while QM11036TR13 offers better 2.4 GHz metrics but sacrifices broadband DC–1 GHz performance and temperature robustness required in metering and broadcast tuner designs.

Availability

ADG918BRMZ-REEL is available at Aetrix Electronics and suitable for wireless metering, antenna diversity systems, and tuner modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADG918BRMZ-REEL 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 is a global leader in high-performance analog, mixed-signal, and RF ICs, serving precision instrumentation, communications, and industrial markets since 1965.

The ADG918BRMZ-REEL belongs to Analog Devices' RF Switch family, engineered specifically for low-distortion, high-isolation signal routing in battery-powered and broadband wireless infrastructure applications.

FAQ

What is the maximum RF input power the ADG918BRMZ-REEL can handle without compression?

The ADG918BRMZ-REEL has a P−1 dB compression point of 17 dBm at 1 GHz, meaning its insertion loss increases by 1 dB when the RF input power reaches +17 dBm. At lower frequencies (e.g., 100 MHz), it tolerates up to 20 dBm. Operation above this level risks nonlinear distortion and degraded adjacent-channel rejection in the ADG918BRMZ-REEL.

Does the ADG918BRMZ-REEL require external matching components?

No. The ADG918BRMZ-REEL is an absorptive switch with internal 50 Ω terminations on RF1 and RF2 ports, providing matched 50 Ω impedance in both ON and OFF states. This eliminates the need for external resistors or matching networks, simplifying PCB layout and reducing bill-of-materials cost for the ADG918BRMZ-REEL.

Can the ADG918BRMZ-REEL operate from a 1.8 V supply?

Yes. The ADG918BRMZ-REEL is fully specified over 1.65 V to 2.75 V, including 1.8 V. At 1.8 V, insertion loss remains ≤0.9 dB at 1 GHz, isolation stays ≥40 dB, and switching times increase only marginally-to ~11 ns. All DC electrical characteristics (VINH/VINL, IDD) remain valid, making 1.8 V a robust choice for the ADG918BRMZ-REEL in low-power systems.

How does the ADG918BRMZ-REEL differ from the ADG919BRMZ-REEL in practical use?

The ADG918BRMZ-REEL uses absorptive architecture (50 Ω terminated OFF ports), ensuring good VSWR regardless of switch state-critical for antenna interfaces. The ADG919BRMZ-REEL is reflective (0 Ω to GND), causing high VSWR on OFF ports. Thus, ADG918BRMZ-REEL is mandatory for T/R switching where reflected energy could damage PA or desensitize LNA, while ADG919BRMZ-REEL may suffice in filter banks with external matching.

Is the ADG918BRMZ-REEL RoHS compliant and lead-free?

Yes. The "Z" suffix in ADG918BRMZ-REEL indicates full RoHS compliance per EU Directive 2011/65/EU, with lead-free terminations and halogen-free molding compound. The device meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) and is qualified for reflow soldering up to 235°C peak temperature, as confirmed in the official ADG918BRMZ-REEL ordering guide.