ADG508FBNZ

Analog Switches, Multiplexers, Demultiplexers Overview

The ADG508FBNZ is an 8-channel analog multiplexer from Analog Devices, housed in a 16-lead plastic dual in-line package (PDIP). It operates on dual supplies ranging from ±5.4 V to ±8.25 V, with a typical operating voltage of ±15 V. The device features a maximum on-resistance of 390 Ω and a typical value of 270 Ω. Switching times are specified at a maximum of 230 ns for turn-on and 130 ns for turn-off. It supports continuous overvoltage inputs from −40 V to +55 V, even when power supplies are off. Power dissipation is limited to 3.3 mW maximum, with supply currents up to 0.2 mA.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Fault protection allows the device to withstand continuous overvoltages from -40 V to +55 V, protecting both the multiplexer and signal sources during power loss or overvoltage events.
• Break-before-make switching construction ensures input signals are protected against momentary shorting during channel transitions.
• Trench isolation technology eliminates latch-up by separating p-channel and n-channel MOSFETs within the dielectric structure.

Analog Switches, Multiplexers, Demultiplexers Applications

• Existing multiplexer applications requiring fault protection
• New designs requiring standard multiplexer functions
• Data acquisition systems

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the specific ordering suffix to confirm the package type and RoHS compliance status. The 'BNZ' designation indicates a 16-lead PDIP package that is RoHS compliant. Ensure the procurement documentation matches the required temperature range and pin configuration for your circuit design.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component for applications requiring high-voltage fault tolerance and low leakage current. Verify that the required number of channels aligns with the eight single-channel configuration. Consider the PDIP package dimensions if through-hole mounting is necessary for the target assembly process.

Analog Switches, Multiplexers, Demultiplexers Part Context

The ADG508FBNZ belongs to the ADG508F/ADG509F series of CMOS analog multiplexers. While the ADG508F provides eight single-ended channels, the companion ADG509F offers four differential channels. Both share identical fault protection capabilities and switching characteristics, differing primarily in channel configuration.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

Public confirmed substitute part numbers: None identified in verified documentation.

Analog Switches, Multiplexers, Demultiplexers FAQ

How does the ADG508FBNZ protect against overvoltage?

It uses a series n-channel, p-channel, n-channel MOSFET structure that saturates during overvoltage, limiting current flow and protecting the device and connected circuits.

What is the maximum overvoltage the device can withstand?

The multiplexer can withstand continuous overvoltage inputs from −40 V to +55 V, regardless of whether the power supplies are present.

Does the device support break-before-make switching?

Yes, the switches are guaranteed to be break-before-make to prevent momentary shorting of input signals during transitions.