MAX4578CWP

Analog Switches - Special Purpose Overview

The MAX4578CWP 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, off-leakage current of 20pA at +25°C, and charge injection of 10pC max. It utilizes address latching and enable inputs with TTL/CMOS logic compatibility.

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 and enable inputs ensure stable state control

Analog Switches - Special Purpose Applications

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

Analog Switches - Special Purpose Procurement Notes

Verify the specific ordering suffix 'CWP' corresponds to the Wide SOIC-20 package and the commercial temperature range of 0°C to +70°C. Confirm that the component meets the required RoHS compliance status as indicated in the manufacturer's documentation. Ensure the source provides valid traceability for this discontinued or limited-supply part number.

Analog Switches - Special Purpose Selection Notes

Select the MAX4578CWP when an 8-channel multiplexer with integrated calibration dividers is required. This model is suitable for designs needing precise voltage ratios without external components. Consider the MAX4579 if dual 4-channel configuration is preferred. Verify that the operating voltage range and package dimensions fit the target PCB layout constraints.

Analog Switches - Special Purpose Part Context

The MAX4578CWP belongs to the MAX4578/MAX4579 family of high-voltage cal-multiplexers. It is designed specifically for applications requiring internal reference generation for calibration. The 'C' suffix denotes the commercial temperature range, while 'WP' indicates the 20-pin Wide SOIC package. It serves as a specialized alternative to standard analog switches by integrating precision resistor networks.

Analog Switches - Special Purpose Replacement Considerations

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