MAX291EWE+

Overview

The MAX291EWE+ is an 8th-order, lowpass, switched-capacitor filter in a 16-pin Wide SO package. It provides a Butterworth response with a clock-tunable corner frequency range from 0.1Hz to 25kHz. The device operates on single +4.75V to +11V or dual ±2.375V to ±5.5V supplies. It features a 100:1 clock-to-corner-frequency ratio and includes an uncommitted op amp for anti-aliasing or noise filtering.

Feature Summary

• Provides maximally flat passband response characteristic of Butterworth filters
• Enables dynamic adjustment of the corner frequency via internal or external clock signals
• Eliminates the need for external resistors or capacitors within the main filter stage
• Integrates an uncommitted operational amplifier for auxiliary signal conditioning

Applications

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

Procurement Notes

Verify that the ordering suffix 'E' confirms the extended temperature range of -40°C to +85°C. Confirm the 'WE' designation matches the required 16-pin Wide SO physical footprint. Ensure the '+' suffix indicates compliance with current environmental standards before finalizing procurement specifications.

Selection Notes

Select this component when a fixed 8th-order Butterworth response is required. Choose the E variant over the C version if operation below 0°C is necessary. Verify that the application can accommodate the 100:1 clock-to-corner-frequency ratio constraint during the design phase.

Part Context

This part belongs to the MAX291/MAX292/MAX295/MAX296 family of switched-capacitor filters. While the MAX291 offers a Butterworth response, the MAX292 provides a Bessel response. The MAX295 and MAX296 variants extend the maximum corner frequency capability up to 50kHz compared to the 25kHz limit of the MAX291 series.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.