ADG428BNZ

Analog Switches, Multiplexers, Demultiplexers Overview

The ADG428BNZ is an LC2MOS latchable analog multiplexer in a 18-pin PDIP package. It switches one of eight inputs to a common output using 3-bit binary address lines (A0, A1, A2). The device operates on single or dual supplies, with maximum ratings of +44 V between VDD and VSS. Key electrical parameters include a maximum on-resistance of 100 Ω, typical off-isolation of -75 dB, and charge injection under 4 pC. Transition times reach up to 300 ns max, while turn-on and turn-off delays are limited to 225 ns and 300 ns respectively. The B version supports an operating temperature range from -40 °C to +85 °C.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• On-chip address and control latches facilitate direct microprocessor interfacing via TTL-compatible digital inputs.
• Enhanced LC2MOS process provides low power dissipation alongside high switching speed and low on-resistance.
• Inherent break-before-make switching action prevents momentary shorting during channel transitions.
• Signal range extends to the supply rails, allowing operation with unipolar single-rail power supplies.

Analog Switches, Multiplexers, Demultiplexers Applications

• Automatic Test Equipment
• Data Acquisition Systems
• Communication Systems
• Avionics and Military Systems
• Microprocessor Controlled Analog Systems

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the specific suffix 'BNZ' against the manufacturer's ordering guide to confirm the Plastic DIP (N-18) package and industrial temperature range (-40 °C to +85 °C). Ensure compatibility with existing PCB footprints for the 18-pin through-hole configuration. Cross-reference datasheet revision C specifications for accurate timing and leakage current limits during integration.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when latchable address inputs are required to simplify digital interface design in bus-controlled systems. The ADG428 is suitable for applications needing break-before-make switching to avoid signal glitches. Consider the extended signal range capability if the application requires analog signals extending to the supply rails. Verify that the 100 Ω maximum on-resistance meets the system's voltage drop requirements.

Analog Switches, Multiplexers, Demultiplexers Part Context

The ADG428/ADG429 series consists of monolithic CMOS analog multiplexers fabricated on an enhanced LC2MOS process. The ADG428 specifically handles eight single channels, whereas the ADG429 manages four differential channels. These devices serve as improved replacements for the DG428/DG429 models, offering better performance characteristics within the same functional family of high-performance analog switches.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

The ADG428BNZ is explicitly documented as a plug-in replacement for the DG428. When substituting, verify that the legacy part's pinout matches the 18-pin PDIP configuration. Ensure the new design accommodates the specific latch control logic (WR, RS, EN) defined in the ADG428 truth table.

Analog Switches, Multiplexers, Demultiplexers FAQ

How does the ADG428 handle channel switching to prevent signal glitches?

The device features inherent break-before-make switching action, which ensures that the previous channel is fully disconnected before the new channel is connected, preventing momentary shorting between outputs.

What is the function of the WR and RS pins?

The Write (WR) pin latches the address data present on A0, A1, and A2 on its rising edge. The Reset (RS) pin clears the internal latches, disabling all channels and returning the multiplexer to a known state.

Can the ADG428 operate with a single power supply?

Yes, the ADG428 can operate from a single rail power supply. It is fully specified for single +12 V operation and remains functional with single supplies as low as +5 V.