MAX7410CPA+

Overview

The MAX7410CPA+ is a 5th-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 from 1Hz to 15kHz via an internal oscillator or external clock using a 100:1 ratio. Key electrical parameters include a typical output offset voltage of ±4mV, -85dB THD+N, and a maximum capacitive load drive of 50pF. It is housed in an 8-pin Plastic DIP 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
• Single-supply +5V operation capability

Applications

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

Procurement Notes

Verify the component matches the specific MAX7410CPA+ designation before integration. Confirm that the operating temperature range aligns with the 0°C to +70°C specification for the 'C' suffix variant. Ensure the application circuit provides the required +5V supply and appropriate clock signals to maintain the specified performance characteristics.

Selection Notes

Select this device when a maximally flat Butterworth response is required for signal conditioning. It is suitable for applications needing precise corner frequency control via external clocks or simple tuning via internal capacitors. Consider the MAX7409 if a Bessel response with faster settling times is preferred instead.

Part Context

This component belongs to the MAX7409/MAX7410/MAX7413/MAX7414 family of 5th-order lowpass switched-capacitor filters. The MAX7410 specifically provides the Butterworth response variant designed for +5V single-supply systems, distinguishing it from the Bessel MAX7409 and the lower-voltage MAX7413/MAX7414 models.

Replacement Considerations

MAX7409CPA (Bessel response)

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 generated internally using a capacitor connected between the CLK pin and ground.

What is the function of the OS pin?

The Offset Adjust (OS) pin allows for adjustment of the DC output level. It should be connected to COM if no offset adjustment is needed, or to an external bias voltage through a resistive divider for DC level shifting.

How does the device enter shutdown mode?

Driving the SHDN pin low activates the shutdown mode, which reduces the supply current to 0.2µA and places the output in a high-impedance state. Driving SHDN high or connecting it to VDD returns the device to normal operation.