MAX7426CUA+T

Overview

The MAX7426CUA+T is a fifth-order, lowpass, elliptic switched-capacitor filter designed for single-supply operation at +5V. It provides sharp rolloff with a transition ratio of 1.25 and typically 37dB of stopband rejection. The corner frequency is clock-tunable from 1Hz to 12kHz using either an external clock or an internal oscillator set by an external capacitor. Operating current is 0.8mA, reducing to 0.2µA in shutdown mode. Key electrical parameters include ±4mV output offset voltage, -80dB THD plus noise, and a supply voltage range of 4.5V to 5.5V.

Feature Summary

• Fifth-order elliptic lowpass response with steep rolloff
• Clock-tunable corner frequency for flexible design
• Low-power operation with dedicated shutdown mode
• Internal oscillator or external clocking options

Applications

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

Procurement Notes

Verify the component matches the specific Analog Devices / Maxim Integrated part number MAX7426CUA+T. Confirm the package type is 8-pin µMAX and the temperature range is 0°C to +70°C. Ensure the datasheet revision aligns with the required specifications before procurement.

Selection Notes

Select this component when a fixed fifth-order elliptic response is required for low-power applications. It is suitable for systems needing sharp rolloff without complex analog tuning. Verify that the system power supply is compatible with the +5V requirement and that the clock source can be provided externally or via an internal capacitor.

Part Context

This device belongs to the MAX7426/MAX7427 family of switched-capacitor filters. The MAX7426 variant is optimized for +5V single-supply operation, while the MAX7427 supports +3V supplies. Both share identical filter characteristics and pinouts, differing primarily in operating voltage.

Replacement Considerations

Public confirmed substitute part numbers are not available in the verified documentation.