MAX270EWP+

Overview

The MAX270EWP+ is a digitally-programmed, dual second-order continuous-time lowpass filter in a 20-pin Wide SOIC package. It operates on ±5V supplies with a range of ±2.375V to ±8V and draws 6.5mA quiescent current. Cutoff frequencies are programmable from 1kHz to 25kHz via 7-bit digital inputs (D0–D6). The device provides a typical dynamic range of 96dB and features a low-power shutdown mode reducing current to less than 15µA.

Feature Summary

• Dual independent second-order Sallen-Key lowpass filter sections
• Digitally programmable cutoff frequencies from 1kHz to 25kHz
• Continuous-time architecture eliminating clock noise
• Low-power shutdown mode for extended battery life

Applications

• Anti-aliasing filtering in data acquisition systems
• Output smoothing for digital-to-analog converters
• Low-noise signal conditioning circuits

Procurement Notes

Verify the component matches the specific EWP+ suffix for the wide SOIC package and industrial temperature range. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors before procurement.

Selection Notes

Select this component for applications requiring precise analog filtering without switched-capacitor clock interference. Ensure the system supports the required bipolar supply voltages and digital control interface for frequency programming.

Part Context

This part belongs to the MAX270/MAX271 family of continuous-time filters. The MAX270 variant includes an uncommitted operational amplifier, whereas the MAX271 integrates a track-and-hold circuit. Both share identical filter core performance characteristics.

Replacement Considerations

Direct functional replacements include the MAX271EWP+ which adds integrated track-and-hold capabilities. Other series members like the MAX274 offer higher order integration but require different control interfaces.