MAX261ACWG

Overview

The MAX261ACWG is a microprocessor-programmable universal active filter manufactured by Maxim Integrated. It contains two second-order switched-capacitor sections housed in a 24-pin Wide SO package with an operating temperature range of 0°C to +70°C. The device supports center frequencies up to 57kHz and operates on single +5V or ±5V supplies. It features independent programming for center frequency (f0) via a 6-bit input and Q factor via a 128-step control, allowing precise configuration of bandpass, lowpass, highpass, notch, and allpass filter modes without external components.

Feature Summary

• Microprocessor interface enables digital control over filter parameters
• Independent programming of center frequency and quality factor
• Supports multiple filter configurations including bandpass and notch

Applications

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

Procurement Notes

Verify the specific ordering suffix ACWG confirms the commercial temperature range and Wide SO package type. Ensure compatibility with existing PCB footprints for the 24-pin surface-mount configuration. Confirm that the supply voltage requirements align with system design specifications before procurement.

Selection Notes

Select this component when center frequencies up to 57kHz are required. Choose between MAX260 or MAX262 if lower offset errors or higher frequency ranges beyond 57kHz are necessary. Verify that the available clock sources meet the internal division requirements for the desired sampling rate.

Part Context

This part belongs to the MAX260/MAX261/MAX262 family of CMOS dual second-order universal switched-capacitor active filters. The MAX261 variant specifically targets applications requiring center frequencies up to 57kHz, distinguishing it from the MAX260's superior DC characteristics and the MAX262's extended frequency range capabilities.

Replacement Considerations

Direct substitutes within the same package and pinout include the MAX260ACWG and MAX262ACWG. Note that these alternatives offer different performance trade-offs regarding center frequency limits and DC offset specifications compared to the MAX261.