ADG904BRU-R-REEL

Analog Switches, Multiplexers, Demultiplexers Overview

The ADG904BRU-R-REEL is a wideband analog 4:1 multiplexer manufactured by Analog Devices Inc. It operates on a single 1.65 V to 2.75 V power supply and utilizes CMOS/LVTTL control logic. The device functions as a reflective SP4T switch with a -3 dB bandwidth of 2.5 GHz. Key electrical specifications include an insertion loss of 1.1 dB at 1 GHz, off-isolation of 37 dB at 1 GHz, and a maximum quiescent current of 1 μA. It supports input power up to 16 dBm with a 0.5 V DC bias. The component is housed in a 20-lead TSSOP package and operates within a temperature range of -40°C to +85°C.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Reflective 4:1 multiplexer architecture designed for high isolation and low insertion loss across the DC to 1 GHz frequency range.
• Integrated CMOS control logic compatible with LVTTL standards, eliminating the need for external control circuitry.
• Low power consumption suitable for wireless applications, featuring a maximum quiescent current of 1 μA.

Analog Switches, Multiplexers, Demultiplexers Applications

• Antenna diversity switching
• High-speed filter selection
• Transmit/receive switching for ISM band and wireless LAN systems

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify that the specific ordering suffix corresponds to the reel packaging format required for automated assembly processes. Confirm the reflective variant designation matches the circuit topology needs, as absorptive versions exist within the same product family. Ensure compliance with RoHS directives if applicable to the manufacturing region.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this reflective model when high off-port VSWR is acceptable or when specific performance features outweigh reflection requirements. For applications requiring minimum reflections back to the RF source regardless of switch mode, consider the absorptive ADG904 variant instead. Verify that the 20-lead TSSOP footprint fits the PCB layout constraints.

Analog Switches, Multiplexers, Demultiplexers Part Context

This component belongs to the ADG90x series of wideband switches from Analog Devices. It shares functional similarities with other members like the ADG902 and ADG904 but differs in configuration and termination type. The series targets general-purpose RF switching and low-power wireless communications where signal integrity and speed are critical.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should verify pin compatibility and electrical parameters against alternative SP4T switches if sourcing issues arise.

Analog Switches, Multiplexers, Demultiplexers FAQ

What is the difference between the ADG904 and ADG904-R?

The ADG904 is an absorptive/matched mux with 50 Ω terminated shunt legs, providing good VSWR on each port. The ADG904-R is a reflective mux with 0 Ω terminated shunts to ground, suitable for applications where high off-port VSWR does not matter.

How is the device controlled?

The device uses a 3-bit binary address consisting of inputs A0, A1, and EN. A Logic 1 on the EN pin disables the device, turning all switches off. When EN is low, the A0 and A1 inputs determine which of the four RF inputs connects to the common RFC port.

What is the maximum input power the switch can handle?

The maximum input power is 16 dBm when a 0.5 V DC bias is applied to the RF ports. Without DC bias, the maximum input power is limited to 7 dBm.