MAX4579CWP

Analog Switches - Special Purpose Overview

The MAX4579CWP is a high-voltage, dual 4-to-1 calibration multiplexer manufactured by Analog Devices Inc./Maxim Integrated. It operates from single +4.5V to +36V or dual ±4.5V to ±20V supplies. The device features on-chip resistor-divider networks providing 15-bit accurate gain and offset ratios (4081/4096 and 15/4096) and 8-bit accurate supply voltage ratios (1/2(V+) and 5/8(V+ - V-)). Key electrical parameters include a maximum on-resistance of 350Ω with 12Ω matching between channels, off-leakage current of 20pA at +25°C, and charge injection of 10pC max. It utilizes address latching for control and provides >2kV ESD protection.

Analog Switches - Special Purpose Feature Summary

• Integrated precision resistor-divider networks generate accurate voltage ratios for ADC calibration and system self-monitoring.
• Supports rail-to-rail analog signal handling across the full supply range.
• Features address latching and enable inputs with TTL and CMOS logic compatibility.

Analog Switches - Special Purpose Applications

• Data-acquisition systems
• Test equipment
• Avionics
• Audio signal routing

Analog Switches - Special Purpose Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and lot traceability upon receipt. Review datasheet specifications for operating temperature ranges and absolute maximum ratings to ensure suitability for the intended environment.

Analog Switches - Special Purpose Selection Notes

Select the MAX4579CWP when dual independent 4-channel switching with integrated calibration references is required. Ensure the application supports the specified wide supply voltage range and that the package dimensions align with the PCB layout constraints for the 20-pin Wide SOIC form factor.

Analog Switches - Special Purpose Part Context

This component belongs to the MAX4578/MAX4579 family of high-voltage cal-multiplexers. While the MAX4578 offers a single 8-to-1 configuration, the MAX4579 provides two separate 4-to-1 multiplexers within the same package, allowing for distinct channel management in complex signal routing architectures.

Analog Switches - Special Purpose Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.

Analog Switches - Special Purpose FAQ

What is the accuracy of the internal gain divider?

The gain divider outputs a voltage ratio of 4081/4096 of the external reference voltage, accurate to 15 bits.

How does the device handle overvoltage conditions on analog pins?

Protection diodes at all inputs clamp signals exceeding the supply rails, providing an ESD rating of greater than 2kV.

Can the MAX4579 operate with asymmetric power supplies?

Yes, the positive and negative power supplies do not need to be symmetrical, provided their sum does not exceed the absolute maximum rating.