MAX295CPA+

Overview

The MAX295CPA+ is an 8th-order, lowpass, switched-capacitor filter in the MAX291 series. It provides a Butterworth response with a corner frequency range of 0.1Hz to 50kHz. The device operates on a single +5V supply or dual ±5V supplies and requires no external resistors or capacitors for basic operation. An internal oscillator generates the clock using an external capacitor, or an external clock signal can be used. A maximum clock-to-corner-frequency ratio of 50:1 is supported. The component includes an uncommitted operational amplifier for post-filtering or anti-aliasing tasks.

Feature Summary

• Provides maximally flat passband response characteristic of Butterworth filters
• Operates with either internal oscillator or external clock signals
• Includes an uncommitted operational amplifier for additional filtering stages

Applications

• ADC Anti-Aliasing Filter
• DAC Post-Filtering
• Noise Analysis
• 50Hz/60Hz Line-Noise Filtering

Procurement Notes

Verify the specific suffix 'CPA+' against the manufacturer's current ordering information to confirm package type and RoHS compliance status. Ensure the required temperature range aligns with the commercial grade specifications defined in the datasheet before finalizing procurement orders.

Selection Notes

Select this component when a fixed 8th-order Butterworth response is required. Verify that the application supports the 50:1 clock-to-corner-frequency ratio. Confirm power supply requirements match the specified single or dual voltage ranges. Evaluate if the integrated op amp meets system needs to reduce external component count.

Part Context

This part belongs to the MAX291/MAX292/MAX295/MAX296 family of 8th-order lowpass switched-capacitor filters. The MAX295 variant specifically offers a Butterworth response and a higher maximum corner frequency compared to the MAX291. The 'CPA' designation indicates an 8-pin Plastic DIP package suitable through-hole mounting.

Replacement Considerations

The MAX291 serves as a functional substitute within the same family but features a lower maximum corner frequency of 25kHz. Both devices share identical pinouts and operational principles, differing primarily in their specified frequency performance limits.