MAX7419CUA+

Overview

The MAX7419CUA+ is a fifth-order, low-pass switched-capacitor filter with a Bessel response. It operates from a single +5V supply (4.5V to 5.5V) and draws 3mA in operating mode. The corner frequency ranges from 0.001kHz to 30kHz, determined by a 100:1 clock-to-corner ratio. Typical internal oscillator frequency is 110kHz with a 1000pF capacitor. Shutdown current is 0.2μA. Output offset voltage is ±4mV typical. It features an 8-pin μMAX package and operates from 0°C to +70°C.

Feature Summary

• Bessel filter response for low overshoot and fast settling
• Switched-capacitor architecture with clock-tunable corner frequency
• Low-power shutdown mode reducing supply current significantly
• Single-supply operation with offset adjust capability

Applications

• ADC anti-aliasing
• DAC postfiltering
• CT2 base stations
• Speech processing

Procurement Notes

Verify the component matches the exact part number MAX7419CUA+. Confirm the manufacturer is Analog Devices Inc./Maxim Integrated. Ensure the package type is 8-pin μMAX. Check that the temperature range corresponds to the C suffix (0°C to +70°C). Validate RoHS compliance if required by the design specifications.

Selection Notes

Select this component when a Bessel response is required for minimal phase distortion and fast settling times. It is suitable for applications needing a 5th-order low-pass filter with a corner frequency up to 30kHz on a single +5V supply. Consider the external clock or internal oscillator options based on the required frequency stability and transition ratio needs.

Part Context

The MAX7419CUA+ belongs to the MAX7418–MAX7425 family of 5th-order, low-pass, switched-capacitor filters. This family includes Elliptic, Bessel, and Butterworth response variants. The MAX7419 specifically provides the Bessel characteristic within the +5V supply group (MAX7418–MAX7421), distinguishing it from the +3V variants (MAX7422–MAX7425).

Replacement Considerations

The MAX7423 serves as the direct functional replacement for the MAX7419 but operates at +3V instead of +5V. Other members of the MAX7418–MAX7425 family share the same package and pinout but offer different filter responses (Elliptic or Butterworth) or operating voltages.