MAX281ACPA+

Overview

The MAX281ACPA+ is a single-channel, fifth-order zero-error Bessel low-pass active filter manufactured by Analog Devices Inc. under the Maxim Integrated brand. It utilizes a switched-capacitor architecture to provide precise frequency response characteristics without requiring external tuning components. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports clock frequencies up to 200 kHz. It is housed in an 8-pin PDIP package and functions as a standalone integrated circuit for signal conditioning applications.

Feature Summary

• Fifth-order Bessel low-pass filter topology
• Zero-error automatic gain and cutoff frequency adjustment
• Switched-capacitor implementation eliminating external passive components

Applications

• Signal conditioning for sensor interfaces
• Anti-aliasing filtering in data acquisition systems
• Noise reduction in precision measurement circuits

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm RoHS compliance status and check for end-of-life notifications prior to procurement. Ensure packaging integrity matches specifications for the PDIP-8 format.

Selection Notes

Select this component when a fixed Bessel response is required without external resistor-capacitor networks. Verify that the system clock frequency aligns with the internal switched-capacitor requirements. Ensure the supply voltage matches the specified 5 V nominal operation.

Part Context

The MAX281 series belongs to Maxim Integrated's family of zero-error active filters. These devices integrate precision analog front-end functionality into a compact form factor. The A-grade variant typically denotes specific performance tolerances compared to standard industrial grades.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate other members of the MAX281 family or similar zero-error filter ICs from the same manufacturer for potential compatibility.