MAX261BEWG+

Overview

The MAX261BEWG+ is a CMOS dual second-order universal switched-capacitor active filter in a 24-pin SOIC package. It supports center frequencies up to 57kHz with a maximum clock frequency of 1.5MHz. The device operates on single +5V or ±5V supplies, drawing a typical power supply current of 16mA. It features independent microprocessor control over the center frequency (f0) and quality factor (Q), utilizing a 6-bit f0 program input and 7-bit Q programming interface.

Feature Summary

• Microprocessor-programmable architecture for precise digital control of filter characteristics
• Dual second-order sections enabling complex filter configurations without external components
• Independent programming of center frequency and Q factor for each filter section

Applications

• Microprocessor-tuned filters
• Anti-aliasing filters
• Digital signal processing systems
• Adaptive filters
• Phase-locked loops

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm the specific suffix indicates the BEWG+ variant. Check for RoHS compliance documentation. Ensure the source provides valid traceability records. Validate that the part matches the specified package and temperature range requirements.

Selection Notes

Select this model when center frequencies up to 57kHz are required. Choose between A and B grades based on the necessary fCLK/f0 ratio accuracy specifications. Verify that the system can provide the necessary clock signals via crystal, RC network, or external generator. Ensure the design accommodates the digital interface timing requirements for WR, address, and data inputs.

Part Context

This component belongs to the MAX260/MAX261/MAX262 family of universal active filters. The MAX261 specifically targets applications requiring center frequencies up to 57kHz, distinguishing it from the MAX260 which offers superior DC performance at lower frequencies, and the MAX262 which extends the range to 140kHz using different sampling ratios.

Replacement Considerations

Public confirmed substitutes include MAX261ACWG+, MAX261BCWG+, MAX261AENG+, and MAX261BENG+. These variants share identical functionality but differ in temperature ranges and accuracy grades.