ADG731BSUZ

Analog Switches, Multiplexers, Demultiplexers Overview

The ADG731BSUZ is a monolithic CMOS analog multiplexer featuring 32 serially controlled channels. It operates on a single supply of 1.8 V to 5.5 V or a ±2.5 V dual supply. The device utilizes a 3-wire SPI-compatible interface for control, with an internal shift register that defaults to all switches OFF upon power-up. Key electrical specifications include a typical on resistance of 4 Ω at 5 V, on resistance flatness of 0.5 Ω, and switching times of 42 ns. It offers rail-to-rail signal range, break-before-make switching action, and low leakage currents in the nanoampere range.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Serially controlled 3-wire interface compatible with standard digital protocols
• Rail-to-rail operation allowing input signals to extend to supply rails
• Guaranteed break-before-make switching to prevent momentary shorting
• Low power dissipation with high switching speed and minimal leakage

Analog Switches, Multiplexers, Demultiplexers Applications

• Optical network control loops and MEMS mirror positioning
• Data acquisition systems requiring high channel counts
• Automatic test equipment and relay replacement circuits
• Audio and video signal switching applications

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the suffix SUZ corresponds to the 48-lead LFCSP package when ordering. Confirm the B version industrial temperature rating (-40°C to +85°C) matches system requirements. Ensure ESD precautions are observed during handling due to sensitivity. Cross-reference pinout diagrams with PCB layout designs to confirm compatibility with existing footprints.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when a single-ended 32-channel multiplexing solution is required. Compare against the ADG725 if differential or dual 16-channel configurations are needed instead. Consider the serial interface overhead versus parallel alternatives like the ADG726/ADG732 if board space allows for more control lines. Verify voltage levels match the specific single or dual supply architecture of the target application.

Analog Switches, Multiplexers, Demultiplexers Part Context

This part belongs to the ADG725/ADG731 family of serially controlled analog multiplexers from Analog Devices Inc. It serves as the single-ended counterpart to the ADG725, which handles dual or differential signals. Both share identical packaging options and control interfaces, differing primarily in channel count and output configuration. They are designed for applications requiring efficient routing of multiple analog signals using minimal microcontroller pins.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

The ADG726/ADG732 are functionally equivalent devices offering parallel interfaces instead of serial control. Direct substitution requires redesigning the control logic to accommodate parallel address lines rather than the 3-wire serial bus. No other direct pin-for-pin replacements are documented in the provided datasheet.