MAX295EWE+T

Overview

The MAX295EWE+T is an 8th-order, lowpass, switched-capacitor filter in a 16-pin Wide SO package. It provides a Butterworth response with a clock-to-corner frequency ratio of 50:1 and a tunable corner frequency range from 0.1Hz to 50kHz. The device operates on dual supplies ranging from ±2.375V to ±5.5V or a single +4.75V to +11V supply. Key electrical characteristics include a typical THD plus noise of -70dB, an internal oscillator current source/sink of ±70µA, and a maximum recommended clock frequency of 2.5MHz.

Feature Summary

• Butterworth filter response for maximally flat passband performance
• Clock-tunable corner frequency up to 50kHz with a 50:1 ratio
• Integrated uncommitted operational amplifier for post-filtering or anti-aliasing
• Supports both internal oscillator and external clock inputs

Applications

• ADC anti-aliasing filtering
• DAC post-filtering
• Noise analysis
• 50Hz/60Hz line-noise filtering

Procurement Notes

Verify the component's authenticity by checking the manufacturer markings against official documentation. Confirm that the ordering suffix corresponds to the correct temperature range and RoHS compliance status. Ensure the package type matches the required 16-pin Wide SO footprint before integration into the design.

Selection Notes

Select this component when a fixed 8th-order Butterworth response is required. The MAX295 series supports higher corner frequencies up to 50kHz compared to the MAX291's 25kHz limit. Designers must ensure the clock frequency is set correctly to achieve the desired cutoff, as the filter response is directly proportional to the clock input.

Part Context

This part belongs to the MAX291/MAX292/MAX295/MAX296 family of 8th-order lowpass switched-capacitor filters. While the MAX291 and MAX292 offer a 100:1 clock ratio and a 25kHz maximum corner frequency, the MAX295 and MAX296 provide a 50:1 ratio and extend the maximum corner frequency to 50kHz.

Replacement Considerations

The MAX291CWE+T serves as a functional substitute within the same family but is limited to a 25kHz maximum corner frequency due to its 100:1 clock-to-corner frequency ratio.