Analog Devices Inc. ADG901BCP-500RL7

Overview

ADG901BCP-500RL7 from Analog Devices is an absorptive single-pole single-throw (SPST) RF switch optimized for 0 Hz to 4.5 GHz operation, delivering 40 dB off-isolation at 1 GHz, 0.8 dB insertion loss at 1 GHz, and 17 dBm P1dB compression point - enabling dc-coupled signal routing up to 0.5 V in antenna diversity and tuner modules.

For engineers reviewing the ADG901BCP-500RL7 datasheet, ADG901BCP-500RL7 pinout, ADG901BCP-500RL7 application, or ADG901BCP-500RL7 equivalent, key selection criteria include absorptive termination for VSWR stability, CMOS/LVTTL control compatibility (1.65 V–2.75 V), sub-10 ns switching times, and LFCSP package thermal performance in compact RF front-ends.

Technical Context

The ADG901BCP-500RL7 implements an absorptive SPST architecture with 50 Ω shunt terminations on both RF ports, ensuring stable input/output return loss (>25 dB at 1 GHz) regardless of switch state. Its CMOS-based control logic accepts 1.65 V–2.75 V logic levels and draws <1 µA quiescent current.

It operates across dc to 4.5 GHz (−3 dB bandwidth), supports dc bias up to 0.5 V without blocking capacitors, and achieves 28.5–36 dBm IP3 at 900 MHz - critical for low-distortion switching in digital transceiver front-ends and high-speed filter selection.

Key Specifications

Pinout & Package

ADG901BCP-500RL7 uses an 8-lead Lead Frame Chip Scale Package (LFCSP), 3 mm × 3 mm body, 0.75 mm height, with exposed pad requiring connection to PCB ground for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG901BCP-500RL7, ADG901BRMZ offers identical RF performance but reduced thermal efficiency in dense layouts, while QM11036 trades absorptive matching and dc coupling for higher power handling - making ADG901BCP-500RL7 uniquely suited for compact, low-distortion, dc-coupled RF routing.

Availability

ADG901BCP-500RL7 is available at Aetrix Electronics and suitable for wireless communications infrastructure, tuner modules, and antenna diversity systems requiring stable component supply, RoHS-compliant packaging, and guaranteed long-term availability.

Supply support for ADG901BCP-500RL7 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 ADG901BCP-500RL7 belongs to Analog Devices' high-frequency RF switch product line, engineered specifically for broadband, low-distortion, dc-coupled signal routing in space-constrained wireless front-ends.

FAQ

What is the maximum dc voltage that can be applied to the RF ports of the ADG901BCP-500RL7?

The ADG901BCP-500RL7 supports dc bias up to 0.5 V on its RF1 and RF2 ports without requiring external blocking capacitors. This dc-coupled capability is enabled by its internal absorptive architecture and is specified under all operating conditions per the Rev. D datasheet. Exceeding 0.5 V risks violating absolute maximum ratings and may degrade RF performance or cause permanent damage to the ADG901BCP-500RL7.

Does the ADG901BCP-500RL7 require external matching components for 50 Ω system operation?

No, the ADG901BCP-500RL7 is designed as an absorptive switch with integrated 50 Ω shunt terminations on both RF ports. When used in a 50 Ω environment, it delivers >25 dB return loss in the on-state and >15 dB in the off-state at 1 GHz without external matching. The ADG901BCP-500RL7's matched architecture eliminates the need for discrete baluns, transformers, or tuning stubs in most standard RF layouts.

What is the thermal resistance (θJA) of the ADG901BCP-500RL7 in a standard 4-layer PCB configuration?

In a standard 4-layer FR4 PCB with proper grounding of the exposed thermal pad, the ADG901BCP-500RL7 achieves θJA = 48°C/W, as documented in the Rev. D datasheet Absolute Maximum Ratings table. This value assumes the EPAD is fully soldered to an internal ground plane. Failure to connect the EPAD reduces thermal performance significantly - for example, to 84°C/W on a 2-layer board - and may limit continuous RF power handling in the ADG901BCP-500RL7.

Can the ADG901BCP-500RL7 operate with a 1.8 V supply, and how does that affect RF performance?

Yes, the ADG901BCP-500RL7 is fully specified for operation from 1.65 V to 2.75 V, including 1.8 V. At 1.8 V, insertion loss increases by ~0.1–0.2 dB and off-isolation decreases by ~3–5 dB versus 2.5 V operation, as shown in Figures 6–8 of the datasheet. These shifts remain within specification limits, and the ADG901BCP-500RL7 maintains full functionality, including dc coupling and CMOS/LVTTL compatibility, at 1.8 V.

How does the ADG901BCP-500RL7 differ from the ADG902 in terms of RF port behavior?

The ADG901BCP-500RL7 is an absorptive switch with 50 Ω shunt terminations, ensuring stable 50 Ω VSWR on both RF ports in on/off states. In contrast, the ADG902 is reflective, with 0 Ω shunt-to-ground, resulting in poor off-state VSWR. This makes the ADG901BCP-500RL7 essential for applications requiring minimal signal reflection - such as feeding LNAs or PAs - whereas the ADG902 suits cost-sensitive, non-critical paths where matching is handled externally.