MAX271CWG

Overview

The MAX271CWG is a digitally-programmed, dual second-order continuous-time lowpass filter in a 20-pin Wide SO package. It operates within a supply voltage range of ±2.375V to ±8V and supports cutoff frequencies from 1kHz to 25kHz via 7-bit digital programming. The device features two independent filter sections with a typical dynamic range of 96dB and includes an internal track-and-hold circuit. It provides a low-power shutdown mode reducing current to less than 15µA.

Feature Summary

• Continuous-time filtering architecture eliminates clock noise associated with switched-capacitor designs
• Dual independently programmable second-order lowpass filter sections
• Integrated track-and-hold circuit for signal sampling applications
• Low-power shutdown mode for extended battery life

Applications

• Anti-aliasing filters for data acquisition systems
• Output smoothing for digital-to-analog converters
• Track-and-hold circuits paired with analog-to-digital converters
• Low-noise signal conditioning stages

Procurement Notes

Verify the specific ordering suffix 'CWG' corresponds to the 20-pin Wide SOIC package and commercial temperature range (0°C to +70°C). Confirm RoHS compliance status as indicated by the 'G' suffix. Ensure the design accommodates the required bipolar or single-supply configuration based on the application's ground reference requirements.

Selection Notes

Select this component when a continuous-time response without clock feedthrough is required. Choose the MAX271 over the MAX270 if an integrated track-and-hold function is needed. Verify that the 1kHz to 25kHz programmable range meets the system bandwidth specifications. Consider the 2MHz internal amplifier bandwidth limit for high-frequency input signals.

Part Context

This part belongs to the MAX270/MAX271 family of digitally-programmable filters. The MAX271 variant specifically integrates a track-and-hold circuit, whereas the MAX270 provides an uncommitted operational amplifier. Both share identical filter core characteristics and digital control interfaces.

Replacement Considerations

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