MAX7410EUA+T

Overview

The MAX7410EUA+T is a fifth-order, lowpass switched-capacitor filter with a Butterworth 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 between 1Hz and 15kHz via an external clock or internal oscillator (fOSC = 30 x 10³ / COSC). Key parameters include ±4mV output offset voltage, -83dB THD+N, and 70dB PSRR. It features a 100:1 clock-to-corner ratio and is housed in an 8-pin µMAX package.

Feature Summary

• Butterworth filter response for maximally flat passband
• Clock-tunable corner frequency from 1Hz to 15kHz
• Low-power operation with dedicated shutdown mode
• Internal oscillator or external clock input options

Applications

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

Procurement Notes

Verify the component matches the specific Maxim Integrated part number MAX7410EUA+T. Confirm the suffix indicates the extended temperature range (-40°C to +85°C) and the µMAX package style. Ensure documentation references the official Analog Devices datasheet for accurate electrical specifications.

Selection Notes

Select this device when a maximally flat passband is required for instrumentation. Choose the MAX7410 over the MAX7409 if Bessel characteristics are not needed. Verify that the system can provide a stable clock signal or suitable capacitor for the internal oscillator to maintain the desired cutoff frequency accuracy.

Part Context

This component belongs to the MAX7409/MAX7410/MAX7413/MAX7414 family of fifth-order lowpass switched-capacitor filters. While the MAX7409 and MAX7413 offer Bessel responses, the MAX7410 provides a Butterworth response optimized for flat passbands. It shares the same physical footprint and pinout as its counterparts within the series.

Replacement Considerations

The MAX7409 serves as a functional alternative if a Bessel response is acceptable instead of Butterworth. For lower voltage applications, the MAX7414 operates at +3V but maintains similar filtering characteristics. Verify compatibility regarding supply voltage requirements and thermal performance ranges.

FAQ

How is the corner frequency determined?

The corner frequency is set by the clock frequency divided by 100. It can be driven by an external clock or an internal oscillator defined by a capacitor connected to the CLK pin.

What is the purpose of the OS pin?

The Offset Adjust (OS) pin allows adjustment of the DC output level. Connecting it to COM disables adjustment, while connecting it to an external bias voltage enables DC level shifting.

How does the shutdown mode function?

Driving the SHDN pin low activates shutdown mode, reducing supply current to 0.2µA and placing the output in a high-impedance state. Driving it high returns the device to normal operation.