MAX7409CPA

Overview

The MAX7409CPA+ is an active filter manufactured by Analog Devices Inc./Maxim Integrated. It is a fifth-order, lowpass, switched-capacitor filter with a cutoff frequency of 15 kHz. The device operates on a single supply voltage ranging from 4.5 V to 5.5 V, typically at 5 V. It features one channel and is housed in an 8-pin UMAX surface-mount package. The component supports a commercial operating temperature range from 0°C to +70°C.

Feature Summary

• Fifth-order elliptic response for steep roll-off characteristics
• Switched-capacitor architecture eliminates external resistors
• Single-supply operation simplifies power requirements

Applications

• Signal conditioning in data acquisition systems
• Anti-aliasing filters for analog-to-digital converters
• Audio processing circuits requiring low-pass filtering

Procurement Notes

Verify the exact ordering suffix against official manufacturer documentation to ensure correct package type and temperature grade. Confirm RoHS compliance status through current datasheets as manufacturing updates may occur. Cross-reference distributor part numbers with the manufacturer's official catalog to avoid discrepancies in specifications or availability.

Selection Notes

Select this component when a high-order lowpass filter is required without external passive components. Ensure the system clock frequency meets the switched-capacitor input requirements specified in the electrical characteristics. Verify that the 15 kHz cutoff aligns with the target signal bandwidth and noise rejection needs.

Part Context

This part belongs to the MAX7409 series of switched-capacitor filters. It shares architectural similarities with other devices in the family but differs in cutoff frequency and order. The CPA+ designation indicates a specific package and lead-free composition compared to older variants.

Replacement Considerations

Direct substitutes include MAX7409CUA+ and MAX7409EUA+. Verify pin compatibility and electrical parameter alignment before substitution.