MAX7408CPA

Overview

The MAX7408CPA is a single-channel, 8th-order lowpass elliptic active filter manufactured by Analog Devices Inc. under the Maxim Integrated brand. It utilizes switched-capacitor technology to achieve a cutoff frequency of 10 kHz with a clock frequency ratio of 256. The device operates on a single supply voltage ranging from 4.5 V to 5.5 V, typically at 5 V. It is housed in an 8-pin PDIP package and supports through-hole mounting. The component functions within a temperature range of 0°C to +70°C.

Feature Summary

• Implements 8th-order elliptic filtering characteristics using switched-capacitor architecture
• Provides precise frequency control via external clock input
• Operates on a standard single 5V power supply

Applications

• Signal conditioning for data acquisition systems
• Anti-aliasing filters in analog-to-digital conversion stages
• Audio processing circuits requiring steep roll-off characteristics

Procurement Notes

Verify the specific suffix 'CPA' against current manufacturer documentation to confirm package type and commercial grade specifications. Check for obsolescence status or lifecycle notices as older Maxim products may have limited availability. Ensure the required clock source matches the 256x ratio specification for the desired 10 kHz cutoff frequency.

Selection Notes

Select this component when an 8th-order elliptic response is required in a compact form factor. Confirm that the application can provide a stable clock signal, as performance depends on the clock-to-cutoff frequency ratio. Verify that the 5V single-supply operation aligns with the system power rails and that the PDIP-8 package fits the PCB layout constraints.

Part Context

This part belongs to the MAX7400 series of switched-capacitor active filters. These devices integrate complex filter functions into small packages, eliminating the need for multiple discrete op-amps and passive components. The series offers various filter responses and cutoff frequencies selectable by clock speed.