MAX270CPP+

Overview

The MAX270CPP+ is a digitally-programmed, dual second-order continuous-time lowpass filter in a 20-pin PDIP package. It operates within a supply voltage range of ±2.375V to ±8V and supports an operating temperature range of 0°C to +70°C. The device features two independent filter sections with programmable cutoff frequencies selectable from 1kHz to 25kHz via 7-bit digital inputs. It provides a typical dynamic range of 96dB and includes a low-power shutdown mode that reduces supply current to less than 15µA.

Feature Summary

• Dual second-order Sallen-Key continuous-time lowpass filter sections
• Digitally programmable cutoff frequencies from 1kHz to 25kHz
• On-board uncommitted operational amplifier for signal buffering
• Low-power shutdown mode disconnecting all outputs

Applications

• Anti-aliasing filtering for data acquisition systems
• Output smoothing for digital-to-analog converters (DACs)
• Cascaded configurations for higher-order response requirements
• Low-noise analog signal conditioning

Procurement Notes

Verify the component matches the specific CPP suffix for the 20-pin PDIP package and commercial temperature grade. Confirm RoHS compliance status as indicated by the plus sign in the part number. Ensure the ordering documentation aligns with the manufacturer's current specifications for this discontinued or limited-stock item.

Selection Notes

Select the MAX270CPP+ when a continuous-time architecture is required to avoid clock noise associated with switched-capacitor filters. This model is suitable for applications needing an integrated uncommitted op amp. Verify that the required cutoff frequency falls within the 1kHz to 25kHz range and that the supply voltage constraints are met.

Part Context

This component belongs to the MAX270/MAX271 family of digitally programmed filters. The MAX270 variant specifically integrates an uncommitted op amp, whereas the MAX271 includes a track-and-hold circuit. Both share identical filter core characteristics but differ in auxiliary on-chip functionality.

Replacement Considerations

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