MAX7412CUA+

Overview

The MAX7412CUA+ is a 5th-order, lowpass, elliptic switched-capacitor filter designed for single-supply +3V operation. It features a clock-to-corner frequency ratio of 100:1, allowing corner frequencies from 1Hz to 15kHz. The device delivers -80dB THD plus noise and provides 53dB stopband rejection with a transition ratio of 1.6. Supply current is 1.2mA in operating mode and reduces to 0.2µA in shutdown mode. It supports self-clocking via an external capacitor or external clock input. The component is housed in an 8-pin µMAX package and operates within a temperature range of 0°C to +70°C.

Feature Summary

• Elliptic lowpass response with sharp rolloff and high stopband rejection
• Clock-tunable corner frequency adjustable from 1Hz to 15kHz
• Low-power shutdown mode significantly reduces supply current consumption
• Single-supply operation optimized for +3V systems

Applications

• ADC anti-aliasing
• Post-DAC filtering
• Speech processing
• CT2 base stations

Procurement Notes

Verify the specific suffix 'CUA+' against official Analog Devices documentation to confirm the commercial temperature grade (0°C to +70°C) and the 8-pin µMAX package configuration. Ensure the ordering code matches the exact part number required for your design specifications before finalizing procurement.

Selection Notes

Select this component when a 5th-order elliptic filter is required for +3V single-supply applications. It is suitable for designs needing precise corner frequency control via clock signals and low power consumption. Verify that the 1.6 transition ratio meets the specific stopband attenuation requirements of the application.

Part Context

The MAX7412CUA+ belongs to the MAX7408/MAX7411/MAX7412/MAX7415 family of 5th-order, lowpass, elliptic switched-capacitor filters. This family shares similar architectural features but differs in operating voltage and transition ratios. The MAX7412 specifically targets +3V systems with a 1.6 transition ratio.

Replacement Considerations

The MAX7415 is a direct functional substitute within the same family, sharing the +3V operating voltage and elliptic characteristics. Designers should verify pin compatibility and ensure the transition ratio difference does not impact system performance.