MAX4578CPP

Analog Switches - Special Purpose Overview

The MAX4578CPP is a high-voltage, single 8-to-1 CMOS calibration multiplexer manufactured by Analog Devices / 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 provide 8-bit accurate output ratios for system self-monitoring
• Rail-to-rail signal handling capability across the full supply range
• Address latching functionality with TTL and CMOS logic compatibility

Analog Switches - Special Purpose Applications

• Precision ADC calibration systems
• Data-acquisition systems requiring self-monitoring
• Test equipment
• Avionics
• Audio signal routing

Analog Switches - Special Purpose Procurement Notes

Verify the specific suffix CPP indicates the 20-pin Plastic DIP package and 0°C to +70°C temperature range. Confirm component authenticity through authorized distributors or manufacturer direct channels. Check for obsolescence status as older Maxim products may have limited availability or end-of-life designations.

Analog Switches - Special Purpose Selection Notes

Select this component when high-voltage operation up to ±20V is required alongside integrated calibration capabilities. Ensure the 350Ω maximum on-resistance meets system signal integrity requirements. Verify that the 20-pin DIP package fits the target PCB layout constraints compared to SSOP or Wide SO alternatives.

Analog Switches - Special Purpose Part Context

The MAX4578 belongs to the MAX4578/MAX4579 family of high-voltage cal-multiplexers. The MAX4578 is the single 8-channel variant, while the MAX4579 offers a dual 4-channel configuration. Both share identical internal calibration divider structures and logic interfaces, differing primarily in channel count and pinout mapping for the additional outputs.

Analog Switches - Special Purpose Replacement Considerations

Direct pin-compatible replacements within the same series include MAX4578EPP (-40°C to +85°C, Plastic DIP) and MAX4578EWP (-40°C to +85°C, Wide SO). Cross-family analog switches require verification of on-resistance, leakage, and voltage rating specifications.