MAX262ACWG+

Overview

The MAX262ACWG+ is a CMOS dual second-order universal switched-capacitor active filter in a 24-pin Wide SO package, operating from 0°C to +70°C. It features microprocessor-controlled center frequency (f0) and Q via 6-bit and 7-bit inputs respectively. The device supports bandpass, lowpass, highpass, notch, and allpass configurations without external components. It operates on single +5V or ±5V supplies with typical power supply current of 16mA at ±5V. The f0 range extends to 140kHz using lower clock-to-f0 ratios compared to the MAX260/MAX261.

Feature Summary

• Microprocessor interface for independent programming of center frequency and Q
• Dual second-order filter sections supporting multiple universal filter topologies
• Integrated oscillator support for crystal, RC network, or external clock sources
• Guaranteed clock-to-center-frequency ratio accuracy for precise tuning

Applications

• Microprocessor-tuned filters
• Anti-aliasing filters
• Digital signal processing systems
• Adaptive filters
• Signal analysis equipment

Procurement Notes

Verify the ordering suffix 'WG+' indicates the Wide SO package and lead-free status. Confirm the temperature grade 'A' corresponds to the commercial 0°C to +70°C range. Ensure the component matches the specific MAX262 variant requirements for higher center frequencies up to 140kHz. Cross-reference the datasheet revision to ensure compatibility with design specifications.

Selection Notes

Select the MAX262 over MAX260/MAX261 when center frequencies exceeding 57kHz are required, as it utilizes lower sampling ratios. Verify that the application can tolerate slightly higher deviation from ideal continuous filter parameters due to these reduced sample rates. Ensure the system provides appropriate clock signals compatible with the internal division by two. Consider the uncommitted op amp availability if additional amplification is needed.

Part Context

The MAX262 belongs to the MAX260/MAX261/MAX262 family of microprocessor-programmable universal active filters. Unlike the MAX260, which prioritizes DC accuracy with auto-zero circuitry, the MAX262 optimizes for higher bandwidth and center frequency ranges. This makes it suitable for applications requiring faster signal processing speeds where strict DC offset performance is less critical than wideband operation.

Replacement Considerations

Direct functional substitutes within the same family include the MAX262AENG (-40°C to +85°C) and MAX262BCWG+ (2% accuracy). For lower frequency applications, the MAX261 offers similar functionality with a 57kHz limit. Ensure pinout compatibility and verify that the replacement part's temperature range and accuracy grades meet the system requirements.