MAX4578CAP

Analog Switches - Special Purpose Overview

The MAX4578CAP is a high-voltage, single 8-to-1 CMOS calibration multiplexer manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +4.5V to +36V supply or dual supplies of ±4.5V to ±20V. The device features on-chip precision resistor-dividers providing 15-bit accurate gain (4081/4096) and offset (15/4096) ratios, as well as 8-bit accurate V+/2 and (V+-V-) dividers. Key electrical parameters include a maximum on-resistance of 350Ω with 12Ω matching between channels, 20pA off-leakage current at +25°C, and 10pC charge injection. It utilizes address latching and TTL/CMOS-compatible logic thresholds within a 20-pin SSOP package.

Analog Switches - Special Purpose Feature Summary

• On-chip precision resistor-divider networks generate accurate voltage ratios for ADC calibration and system self-monitoring without external components.
• Rail-to-rail analog signal handling capability allows the switches to pass signals across the full supply range.
• Integrated address latching and enable inputs simplify digital control and state retention during power transitions.

Analog Switches - Special Purpose Applications

• Data-acquisition systems requiring precision ADC calibration
• Test equipment utilizing system self-monitoring capabilities
• Avionics and audio signal routing applications

Analog Switches - Special Purpose Procurement Notes

Verify the specific suffix 'CAP' corresponds to the commercial temperature range (0°C to +70°C) and 20-pin SSOP package configuration. Confirm that the component meets RoHS compliance standards if required for the target assembly process. Ensure the ordering documentation matches the manufacturer's part numbering system for this exact variant.

Analog Switches - Special Purpose Selection Notes

Select the MAX4578CAP when high-voltage operation up to ±20V is required alongside integrated calibration functions. This component is suitable for designs needing precise internal voltage references for gain and offset adjustments. Consider the 20-pin SSOP footprint and commercial temperature limits during PCB layout and thermal analysis.

Analog Switches - Special Purpose Part Context

This component belongs to the MAX4578/MAX4579 family of high-voltage cal-multiplexers. The MAX4578 variant provides a single 8-to-1 configuration, whereas the MAX4579 offers a dual 4-to-1 topology. Both share identical internal divider architectures and switching characteristics, differing primarily in channel count and pin assignment for the second multiplexer section.

Analog Switches - Special Purpose Replacement Considerations

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