MAX7419EUA+

Overview

The MAX7419EUA+ is a fifth-order, low-pass switched-capacitor filter with a Bessel response. It operates from a single +5V supply and draws 3mA in normal mode, reducing to 0.2μA in shutdown. The corner frequency ranges from 1Hz to 30kHz via a 100:1 clock-to-corner ratio. Key electrical parameters include an output offset voltage of ±4mV (max ±25mV), a power-supply rejection ratio of 70dB, and a typical THD+N of -78dB at 2kHz input. It features a 100kΩ COM input resistance and supports resistive loads down to 10Ω or capacitive loads up to 500pF.

Feature Summary

• Bessel filter response providing low overshoot and fast settling times for multiplexer-driven ADC applications
• Clock-tunable corner frequency adjustable from 1Hz to 30kHz using internal oscillator or external clock
• Low-power operation with a dedicated shutdown mode that reduces current consumption to 0.2μA
• Single-supply design compatible with standard CMOS logic levels for clock and control inputs

Applications

• ADC anti-aliasing filtering in data acquisition systems
• Post-DAC signal conditioning and reconstruction filtering
• Speech processing circuits requiring linear phase characteristics
• CT2 base station signal processing

Procurement Notes

Verify the specific suffix 'EUA' confirms the extended temperature range of -40°C to +85°C and the 8-pin μMAX package. Confirm RoHS compliance status through official manufacturer documentation before finalizing procurement specifications.

Selection Notes

Select this component when a maximally flat passband is not required but linear phase and rapid settling are critical. Ensure the system clock can be maintained within the 100:1 ratio relative to the desired cutoff frequency. Verify that the single +5V supply aligns with the target application's power architecture.

Part Context

This device belongs to the MAX7418–MAX7425 family of fifth-order low-pass switched-capacitor filters. While other variants offer Elliptic or Butterworth responses, the MAX7419 specifically provides the Bessel characteristic necessary for preserving step input shapes in high-speed sampling environments.

Replacement Considerations

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