MAX270CWP+

Overview

The MAX270CWP+ is a digitally-programmed, dual second-order continuous-time lowpass filter in a 20-pin Wide SOIC package. It operates on supply voltages ranging from ±2.375V to ±8V with a typical quiescent current of 6.5mA. The device features two independent filter sections with programmable cutoff frequencies between 1kHz and 25kHz, selected via seven-bit digital codes. It provides a dynamic range exceeding 96dB and includes a low-power shutdown mode reducing current to under 15µA.

Feature Summary

• Continuous-time filtering architecture eliminates clock noise associated with switched-capacitor designs.
• Dual independently programmable second-order Sallen-Key filter sections for flexible signal processing.
• Integrated uncommitted operational amplifier available for external circuit buffering or conditioning.

Applications

• Anti-aliasing filters preceding analog-to-digital converters
• Output smoothing for digital-to-analog converter stages
• Low-noise audio signal conditioning

Procurement Notes

Verify the component status as discontinued through official manufacturer channels. Confirm that the specific ordering suffix corresponds to the required lead-free/RoHS-compliant variant. Ensure compatibility with existing system voltage rails and interface logic levels before finalizing procurement plans.

Selection Notes

Select this component when continuous-time performance is required to avoid switched-capacitor clock artifacts. Verify that the 1kHz to 25kHz programmable frequency range meets application bandwidth requirements. Consider the MAX271 variant if an integrated track-and-hold function is necessary instead of the uncommitted op amp found in the MAX270.

Part Context

This part belongs to the MAX270/MAX271 family of digitally programmed filters manufactured by Analog Devices Inc./Maxim Integrated. The 'C' designation indicates a commercial temperature range of 0°C to +70°C, while the 'WP' suffix specifies the 20-pin Wide Small Outline package.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. As the product is listed as discontinued, alternative solutions require evaluating equivalent continuous-time filter architectures from other manufacturers.