MAX7409EUA+T

Overview

The MAX7409EUA+T is a fifth-order, lowpass switched-capacitor filter with a Bessel response. It operates from a single +5V supply and draws 1.2mA in active mode, reducing to 0.2µA in shutdown. The corner frequency is tunable from 0.001kHz to 15kHz via an internal oscillator or external clock, maintaining a fixed 100:1 ratio. Key electrical parameters include a maximum output offset voltage of ±25mV, a power-supply rejection ratio of 70dB, and a typical total harmonic distortion plus noise of -85dB. The device is housed in an 8-pin µMAX package and supports an operating temperature range of -40°C to +85°C.

Feature Summary

• Provides a Bessel filter response for fast settling and minimal overshoot.
• Features a low-power shutdown mode that reduces current consumption significantly.
• Supports both self-clocking via an external capacitor and external clock inputs.

Applications

• ADC anti-aliasing
• DAC postfiltering
• Speech processing

Procurement Notes

Verify the specific suffix 'EUA' confirms the industrial temperature range (-40°C to +85°C) and the 8-pin µMAX surface-mount package. Confirm RoHS compliance status through official manufacturer documentation before procurement.

Selection Notes

Select this component when a Bessel response is required for applications needing fast settling times, such as multiplexed ADC inputs. Ensure the system provides a stable +5V single supply and allows for clock synchronization if used for DAC filtering.

Part Context

This part belongs to the MAX7409/MAX7410/MAX7413/MAX7414 family of fifth-order lowpass switched-capacitor filters. The MAX7409 variant specifically offers a Bessel response, whereas the MAX7410 provides a Butterworth response. Both operate on a +5V supply.

Replacement Considerations

The MAX7410EUA+T serves as a functional substitute within the same package and supply voltage, offering a Butterworth response instead of Bessel. The MAX7413EUA+T is compatible regarding package but requires a +3V supply.