MAX7401ESA+

Overview

The MAX7401ESA+ is an 8th-order, lowpass, Bessel switched-capacitor filter designed for single-supply operation at +5V. It provides a tunable corner frequency ranging from 1Hz to 5kHz with a fixed 100:1 clock-to-corner ratio. The device operates with a supply current of 2mA in active mode and reduces to 0.2µA in shutdown mode. Key electrical parameters include a total harmonic distortion plus noise of -82dB, an output offset voltage of ±5mV, and a maximum resistive output load drive of 10kΩ. It supports both internal oscillator configuration via an external capacitor and external clocking.

Feature Summary

• Provides 8th-order lowpass Bessel filtering characteristics with fast settling times and low overshoot.
• Features a low-power shutdown mode that significantly reduces supply current consumption.
• Offers flexible clocking options through either an internal oscillator or an external clock source.

Applications

• ADC anti-aliasing
• Post-DAC filtering
• Speech processing

Procurement Notes

Verify the component authenticity by checking the marking on the package against the official datasheet specifications. Confirm the ordering suffix matches the requested temperature range and package type. Ensure the supplier provides valid traceability documentation to guarantee the integrity of the electronic components during procurement.

Selection Notes

Select this component when an 8th-order Bessel response is required for signal conditioning. Verify that the system power supply aligns with the +5V requirement for the MAX7401 variant. Consider the 100:1 clock-to-corner ratio when designing the clock generation circuitry to ensure the desired cutoff frequency is accurately achieved within the specified operational limits.

Part Context

This part belongs to the MAX7401/MAX7405 family of switched-capacitor filters manufactured by Maxim Integrated. The 'E' suffix indicates an extended industrial temperature range of -40°C to +85°C, while the 'SA' suffix denotes an 8-pin SOIC package. This specific model is the higher-voltage +5V version of the series.

Replacement Considerations

The MAX7405 serves as a lower-voltage alternative operating from a +3V supply. Other members of the MAX740x family may offer different order responses or pin configurations. Verify compatibility regarding supply voltage, package dimensions, and electrical performance before substituting.