MAX292CPA

Overview

The MAX292CPA is an 8th-order, lowpass, switched-capacitor filter manufactured by Analog Devices Inc./Maxim Integrated. It features a Bessel response designed for low overshoot and fast settling times. The device operates with a clock-to-corner-frequency ratio of 100:1, supporting corner frequencies from 0.1Hz to 25kHz. It requires no external resistors or capacitors for the main filtering function and can be powered by a single +5V supply or dual ±5V supplies. The component is housed in an 8-pin Plastic DIP package and functions within a temperature range of 0°C to +70°C.

Feature Summary

• Provides an 8th-order Bessel lowpass filter response characterized by linear phase shift and minimal signal overshoot.
• Enables dynamic adjustment of the corner frequency through variation of the external clock signal rate.
• Integrates an uncommitted operational amplifier suitable for constructing additional continuous-time anti-aliasing or noise filtering stages.

Applications

• Anti-aliasing filtering preceding analog-to-digital converters (ADCs)
• Post-filtering stages following digital-to-analog converters (DACs)
• Noise analysis instrumentation
• Attenuation of 50Hz/60Hz line-noise interference

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm the exact package type and temperature rating. Ensure that the procurement channel sources components directly from authorized distributors to guarantee authenticity and traceability. Confirm RoHS compliance status if required by assembly specifications.

Selection Notes

Select this component when a maximally flat passband is not required and preserving step-response waveform integrity is critical. The Bessel characteristic makes it suitable for multiplexed systems where rapid settling after channel switching is necessary. Verify that the available clock frequency allows for the desired corner frequency within the specified 100:1 ratio.

Part Context

This part belongs to the MAX291/MAX292/MAX295/MAX296 family of switched-capacitor filters. While the MAX291 offers a Butterworth response, the MAX292 specifically provides a Bessel response. These devices share identical pinouts and internal architectures, differing primarily in their frequency response characteristics and maximum corner frequency limits.

Replacement Considerations

The MAX291 serves as a functional alternative if a Butterworth response is acceptable instead of Bessel. Other members of the series include the MAX295 and MAX296, which support higher corner frequencies up to 50kHz. Cross-referencing datasheets is essential to ensure compatibility with existing clock generation circuits.