Analog Devices Inc. ADG936BRU

Overview

ADG936BRU from Analog Devices is an absorptive dual SPDT RF switch optimized for wideband operation up to 4 GHz, delivering 36 dB off-isolation at 1 GHz, 0.9 dB insertion loss at 1 GHz, and operation from 1.65 V to 2.75 V CMOS/LVTTL-compatible supply. It serves as a matched RF signal routing element in transceiver front ends and antenna diversity paths.

For engineers reviewing the ADG936BRU datasheet, ADG936BRU pinout, ADG936BRU application, or ADG936BRU equivalent, key selection criteria include its 50 Ω-terminated shunt legs (absorptive architecture), TSSOP-20 package, −40°C to +85°C industrial temperature range, and suitability for ISM-band wireless systems requiring minimal reflection and high port-to-port isolation.

Technical Context

The ADG936BRU implements two independent SPDT switches using a CMOS process with on-chip 50 Ω termination on all shunt legs, enabling true absorptive behavior-maintaining good VSWR on all ports regardless of switch state. Its control logic accepts CMOS/LVTTL inputs and requires no external biasing or dc blocking capacitors.

It operates across dc to 4 GHz (−3 dB point), supports 0 dBm input power (7 dBm at 0 V dc bias), achieves 16 dBm P–1 dB compression at 1 GHz, and delivers 32 dBm IP3 at 900 MHz-making it suitable for low-distortion, high-linearity RF signal routing in digital transceivers and tuner modules.

Key Specifications

Pinout & Package

ADG936BRU is packaged in a 20-lead TSSOP (RU-20) with exposed pad tied to GND. Pin layout supports symmetric RF routing and decoupling via dedicated VDD and multiple GND pins.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual SPDT RF switching applications.

Compared with ADG936BCPZ, ADG936BRU offers easier hand-soldering and legacy compatibility but higher thermal resistance; compared with ADG936BRU-R, ADG936BRU provides guaranteed 50 Ω match on all ports-enabling drop-in use in reflection-sensitive RF front ends without redesign.

Availability

ADG936BRU is available at Aetrix Electronics and suitable for wireless communications infrastructure, digital transceiver front ends, and antenna diversity systems requiring stable component supply across extended production lifecycles.

Supply support for ADG936BRU 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 ADG9xx family was designed specifically for wideband, low-power RF signal routing in ISM-band and sub-1 GHz wireless systems-emphasizing absorptive matching, single-supply operation, and integration-ready control interfaces.

FAQ

What is the RF bandwidth limit of the ADG936BRU?

The ADG936BRU has a −3 dB operating bandwidth of 4 GHz, verified per Analog Devices Rev. B datasheet Figure 3 and Table 1. This enables full coverage of 2.4 GHz and 5 GHz Wi-Fi bands, Bluetooth, Zigbee, and sub-6 GHz 5G NR FR1 without external compensation. Performance degrades gradually beyond 4 GHz, with usable isolation maintained up to 6 GHz in some configurations.

Does the ADG936BRU require external dc blocking capacitors?

No, the ADG936BRU does not require external dc blocking capacitors on any RF port. Its internal CMOS architecture and 50 Ω absorptive termination allow direct connection of dc-coupled RF sources and loads, as confirmed in the General Description and Applications sections of the Rev. B datasheet. This simplifies layout and reduces insertion loss at low frequencies.

What is the difference between ADG936BRU and ADG936BRU-R?

The ADG936BRU is an absorptive dual SPDT switch with 50 Ω-terminated shunt legs, ensuring matched VSWR on all ports. The ADG936BRU-R is the reflective variant with 0 Ω shunt termination-resulting in high off-port VSWR. They share identical pinout and supply specs but are not functionally interchangeable in reflection-sensitive designs like antenna diversity or PA output switching.

What package type is used by the ADG936BRU?

The ADG936BRU uses a 20-lead Thin Shrink Small Outline Package (TSSOP), designated RU-20 per the Ordering Guide. It measures 6.5 mm × 4.4 mm with 0.65 mm lead pitch and includes an exposed pad that must be soldered to GND for thermal and electrical integrity, as detailed in Figures 30 and 5 of the Rev. B datasheet.

Can the ADG936BRU operate from a 1.8 V supply?

Yes, the ADG936BRU supports 1.65 V to 2.75 V operation, fully covering 1.8 V nominal supply rails. Electrical characteristics-including 0.9 dB insertion loss and 36 dB isolation at 1 GHz-are specified across this range (Table 1, Rev. B datasheet), and Figure 9 confirms stable insertion loss performance at 1.8 V across frequency.