MAX292EWE+

Overview

The MAX292EWE+ is an 8th-order lowpass switched-capacitor filter with a Bessel response, designed for applications requiring low overshoot and fast settling. It operates on a single +5V supply (4.75V to 11V) or dual ±5V supplies (±2.375V to ±5.5V). The device features a clock-to-corner frequency ratio of 100:1, allowing corner frequencies from 0.1Hz to 25kHz. It includes an internal oscillator controlled by an external capacitor or accepts an external clock signal. An uncommitted operational amplifier is integrated for post-filtering or anti-aliasing tasks.

Feature Summary

• Bessel filter response providing low overshoot and fast settling times
• Integrated uncommitted operational amplifier for additional filtering stages
• Flexible clocking options using either an internal oscillator or external signals

Applications

• ADC anti-aliasing filters in multiplexed data acquisition systems
• DAC post-filtering applications requiring synchronized clocks
• Noise analysis circuits
• 50Hz/60Hz line-noise filtering

Procurement Notes

Verify the component status as the MAX292 series may be subject to obsolescence notices. Confirm that the specific EWE+ suffix corresponds to the 16-pin Wide SO package and meets RoHS compliance requirements. Ensure the operating temperature range aligns with industrial specifications if required for the target environment.

Selection Notes

Select the MAX292EWE+ when a Bessel response is necessary to preserve step input shapes compared to the Butterworth MAX291. Verify that the required corner frequency falls within the 0.1Hz to 25kHz range defined by the 100:1 clock ratio. Ensure the design accommodates the 16-pin Wide SO footprint and provides appropriate power supply decoupling for stable operation.

Part Context

The MAX292EWE+ belongs to the MAX291/MAX292/MAX295/MAX296 family of easy-to-use switched-capacitor filters. While the MAX291 and MAX295 offer Butterworth responses, the MAX292 and MAX296 provide Bessel characteristics. This family eliminates the need for external resistors and capacitors for the main filter section, relying instead on precise clock frequencies to set performance parameters.

Replacement Considerations

The MAX291CWE+ serves as a functional substitute if a Butterworth response is acceptable instead of Bessel. The MAX295EWE+ and MAX296EWE+ are available but operate with a different 50:1 clock-to-corner frequency ratio and support higher maximum corner frequencies up to 50kHz.