MAX4540CPP

Analog Switches - Special Purpose Overview

The MAX4540CPP is a dual 4-to-1 calibration multiplexer manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of +2.7V to +12V (single) or ±2.7V to ±6V (dual). The device features an on-resistance maximum of 100Ω with matching between channels limited to 6Ω max. Off leakage current is specified at 0.1nA at +25°C and 2nA at +85°C. Charge injection is capped at 5pC max. The component utilizes a 20-pin Plastic DIP package and supports an operating temperature range of 0°C to +70°C.

Analog Switches - Special Purpose Feature Summary

• On-chip gain and offset divider networks provide 15-bit accurate output ratios for precision ADC calibration.
• Integrated V+ to GND and V+ to V- divider networks deliver 8-bit accurate output ratios for system self-monitoring.
• Rail-to-Rail analog signal handling capability with low off-leakage current characteristics.

Analog Switches - Special Purpose Applications

• Precision ADC calibration
• System self-monitoring
• Data-acquisition systems

Analog Switches - Special Purpose Procurement Notes

Verify the specific suffix CPP corresponds to the 20-pin Plastic DIP package and the commercial temperature range (0°C to +70°C). Confirm that the ordering information matches the manufacturer's current documentation, as older suffixes may indicate discontinued variants or different packaging options compared to standard industrial grades.

Analog Switches - Special Purpose Selection Notes

Select this component when dual independent 4-channel switching with integrated calibration references is required. Ensure the application fits within the single +2.7V to +12V or dual ±2.7V to ±6V supply constraints. Verify that the 0°C to +70°C commercial temperature range meets the environmental requirements of the target system design.

Analog Switches - Special Purpose Part Context

This part belongs to the MAX4539/MAX4540 family of low-voltage CMOS cal-multiplexers. While the MAX4539 provides a single 8-to-1 configuration, the MAX4540 offers two independent 4-to-1 channels. Both share identical internal calibration divider architectures and logic interfaces, differing primarily in channel count and pin assignment for the second multiplexer section.

Analog Switches - Special Purpose Replacement Considerations

MAX4540EPP: Industrial temperature grade (-40°C to +85°C) in 20-pin Plastic DIP.

Analog Switches - Special Purpose FAQ

How does the CAL pin function?

Asserting the CAL pin enables the internal resistor-divider networks, allowing the selection of gain, offset, or reference voltage outputs via the address pins.

What is the break-before-make interval?

The device guarantees a break-before-make interval of 10ns typical to prevent short circuits during switching transitions.

Are the logic inputs TTL compatible?

Yes, the digital inputs have 0.8V and 2.4V logic thresholds, ensuring compatibility with both TTL and CMOS logic when using a ±5V or single +5V supply.