MAX292CWE

Overview

The MAX292CWE is an 8th-order lowpass switched-capacitor filter in the MAX291 series, manufactured by Analog Devices Inc./Maxim Integrated. It features a Bessel response for low overshoot and fast settling. 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 filter configuration and supports both internal oscillator (via one external capacitor) and external clock inputs. Electrical characteristics include a supply voltage range of 4.75V to 11V single-supply or ±2.375V to ±5.5V dual-supply, with typical total harmonic distortion plus noise of -70dB. The component is housed in a 16-pin Wide SO package.

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 implementing additional continuous-time filtering stages.

Applications

• Anti-aliasing filtering preceding analog-to-digital converters
• Post-filtering for digital-to-analog converter outputs
• Noise analysis systems requiring precise signal conditioning

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm package type and temperature rating. Confirm RoHS compliance status as indicated by the '+' symbol in the part number. Ensure that the selected variant matches the required operating temperature range for the intended application environment before finalizing procurement.

Selection Notes

Select the MAX292CWE when a maximally flat passband is not required and preservation of step input shape is critical due to its Bessel characteristic. Ensure the system design accommodates the 100:1 clock-to-corner frequency ratio constraint. Verify that the available clock source meets the CMOS logic level requirements for the CLK pin interface.

Part Context

The MAX292CWE belongs to the MAX291 family of easy-to-use switched-capacitor filters. This series includes the MAX291, MAX292, MAX295, and MAX296 models. While the MAX291 and MAX295 utilize Butterworth responses, the MAX292 and MAX296 are specifically designed with Bessel characteristics. All variants share similar architectural features but differ in their frequency response profiles and maximum corner frequency capabilities.

Replacement Considerations

Public confirmed substitute part numbers: MAX292ESA, MAX292EPA, MAX292CPA, MAX292CSA.