MAX295EWE

Overview

The MAX295EWE 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 corner frequency range from 0.1Hz to 50kHz. The device operates on dual supplies ranging from ±2.375V to ±5.5V or a single supply up to 11V, drawing approximately 15mA at ±5V. It features an internal oscillator controlled by an external capacitor or accepts an external clock signal. An uncommitted operational amplifier is included for additional filtering tasks.

Feature Summary

• Provides an 8th-order lowpass Butterworth filter response for maximally flat passband performance
• Supports both internal oscillator generation using an external capacitor and direct external clock input
• Includes an uncommitted operational amplifier suitable for anti-aliasing or post-filtering applications

Applications

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

Procurement Notes

Verify the specific suffix against official documentation to confirm temperature range and RoHS compliance status. Confirm package dimensions match the 16-pin Wide SO specification. Ensure design accounts for the required external clock capacitor if utilizing the internal oscillator function.

Selection Notes

Select this component when an 8th-order Butterworth response is required with a maximum corner frequency of 50kHz. Verify that the system can provide the necessary clock frequency, which must be at least 50 times the desired cutoff frequency. Ensure power supply rails accommodate the specified voltage ranges for optimal performance.

Part Context

This part belongs to the MAX291/MAX292/MAX295/MAX296 family of 8th-order lowpass switched-capacitor filters. While the MAX291 and MAX292 are limited to a 25kHz corner frequency, the MAX295 and MAX296 extend this range to 50kHz. The MAX295 specifically offers the Butterworth response variant within this higher-speed subset.

Replacement Considerations

MAX291CWE

FAQ

What is the relationship between the clock frequency and the corner frequency?

The MAX295 operates with a fixed clock-to-corner frequency ratio of 50:1.

Can the device operate with a single power supply?

Yes, it can operate with a single +5V supply or dual ±5V supplies.

What is the purpose of the uncommitted op amp?

It can be used to build a continuous-time lowpass filter for post-filtering or anti-aliasing purposes.