MAX261BCWG+

Overview

The MAX261BCWG+ is a microprocessor-programmable universal active filter manufactured by Analog Devices/Maxim Integrated. It features two second-order switched-capacitor sections housed in a 24-pin Wide SOIC package. The device supports center frequencies up to 57kHz with a guaranteed clock-to-f0 ratio accuracy of ±1% for the A grade and ±2% for the B grade. It operates on single +5V or dual ±5V supplies, drawing a typical power supply current of 16mA at ±5V. The unit functions within a commercial temperature range of 0°C to +70°C.

Feature Summary

• Microprocessor interface allows independent programming of center frequency and Q factor via digital inputs.
• Supports multiple filter configurations including bandpass, lowpass, highpass, notch, and allpass without external components.
• Includes an uncommitted operational amplifier available on specific pins for additional signal processing.

Applications

• Microprocessor-tuned filters
• Anti-aliasing filters
• Digital signal processing systems

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the ordering suffix matches the required package type and temperature rating. Check for RoHS compliance status as indicated in official documentation. Ensure the specific grade (A or B) aligns with the required fCLK/f0 ratio accuracy specifications for the design.

Selection Notes

Select this model when center frequencies up to 57kHz are required, distinguishing it from the MAX260 (7.5kHz) and MAX262 (140kHz). Choose the 'B' suffix variant if a ±2% fCLK/f0 ratio error tolerance is acceptable, offering cost benefits over the 'A' grade. Ensure the Wide SOIC package fits the PCB layout constraints compared to DIP options.

Part Context

This component belongs to the MAX260/MAX261/MAX262 family of CMOS dual second-order universal switched-capacitor active filters. While sharing the same core architecture and pinout, the MAX261 specifically targets applications requiring a center frequency range extending to 57kHz, bridging the gap between the lower-frequency MAX260 and the higher-frequency MAX262.

Replacement Considerations

MAX261ACWG+