MAX295CWE+T

Overview

The MAX295CWE+T is an 8th-order lowpass switched-capacitor filter in the MAX291 series, featuring a Butterworth response for maximally flat passband performance. It operates with a single +5V supply or dual ±5V supplies and supports corner frequencies from 0.1Hz to 50kHz. The device utilizes a 50:1 clock-to-corner-frequency ratio and includes an internal oscillator or external clock input. An uncommitted operational amplifier is integrated for post-filtering or anti-aliasing tasks. Manufactured by Analog Devices/Maxim Integrated, it is housed in an 8-pin SO package.

Feature Summary

• Provides 8th-order lowpass filtering with a fixed Butterworth response for minimal passband deviation.
• Supports both internal oscillator generation via an external capacitor and direct external clock inputs.
• Includes an uncommitted operational amplifier configured as a continuous-time lowpass filter for additional signal conditioning.

Applications

• Anti-aliasing filters preceding analog-to-digital converters (ADCs)
• Post-filtering stages following digital-to-analog converters (DACs)
• Noise analysis systems requiring precise frequency attenuation
• Line-noise filtering for 50Hz or 60Hz power line interference

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm RoHS compliance status indicated by the plus suffix. Ensure the specific ordering suffix matches the required temperature range and package type for your design constraints.

Selection Notes

Select this component when a maximally flat magnitude response is required over a wide dynamic range. The MAX295 offers a higher maximum corner frequency of 50kHz compared to the MAX291's 25kHz limit. Ensure the system clock can be maintained within the specified tolerance to preserve filter accuracy.

Part Context

This part belongs to the MAX291/MAX292/MAX295/MAX296 family of easy-to-use switched-capacitor filters. While the MAX291 provides a similar Butterworth response, the MAX295 extends the usable frequency range up to 50kHz. The MAX292 and MAX296 variants offer Bessel responses instead.

Replacement Considerations

The MAX291CWE+T serves as a functional substitute with identical Butterworth characteristics but a lower maximum corner frequency of 25kHz. Verify that the reduced bandwidth meets the application requirements before substitution.