MAX4578CWP+T

Analog Switches - Special Purpose Overview

The MAX4578CWP+T 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 generating accurate voltage ratios: 15/4096 and 4081/4096 (15-bit accuracy) for gain and offset calibration, and 1/2(V+) and 5/8(V+ - V-) (8-bit accuracy) for self-monitoring. 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 provides >2kV ESD protection.

Analog Switches - Special Purpose Feature Summary

• On-chip gain and offset divider networks provide 15-bit accurate output ratios for ADC calibration
• Internal V+ to GND and V+ to V- divider networks deliver 8-bit accurate ratios for system self-monitoring
• Rail-to-Rail signal handling capability ensures compatibility with full analog input ranges
• Address latching functionality allows stable state capture independent of continuous logic inputs

Analog Switches - Special Purpose Applications

• Precision ADC calibration systems
• System self-monitoring applications
• Data-acquisition systems
• Test equipment

Analog Switches - Special Purpose Procurement Notes

Verify the specific suffix 'CWP' corresponds to the Wide SOIC-20 package and the commercial temperature range of 0°C to +70°C. Confirm RoHS compliance status through official documentation. Ensure the ordering code matches the exact pinout and thermal characteristics required for the target PCB layout.

Analog Switches - Special Purpose Selection Notes

Select this component when high-voltage operation up to ±20V is required alongside integrated calibration capabilities. The 8-channel configuration suits applications needing multiple input routing with precise reference generation. Consider the 350Ω on-resistance limit and 20pA leakage specifications against signal integrity requirements.

Analog Switches - Special Purpose Part Context

This part belongs to the MAX4578/MAX4579 family of high-voltage cal-multiplexers. The MAX4578 variant provides a single 8-to-1 switching path, whereas the MAX4579 offers dual 4-to-1 paths. Both share identical internal divider architectures and control logic, differing primarily in channel count and pin assignment.

Analog Switches - Special Purpose Replacement Considerations

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