MAX293CSA

Overview

The MAX293CSA is an eighth-order, lowpass, elliptic switched-capacitor active filter manufactured by Analog Devices Inc./Maxim Integrated. It operates with a cutoff frequency of 25 kHz and requires a single external clock input to define the filter response. The device functions within a supply voltage range of 4.75 V to 11 V and supports operation temperatures from 0°C to +70°C. Housed in an 8-pin SOIC package, it integrates complex filtering capabilities into a compact surface-mount form factor suitable for precision signal processing applications.

Feature Summary

• Provides high-selectivity elliptic filter characteristics using switched-capacitor technology
• Requires only a single external clock source to set the operational frequency
• Integrates eighth-order filtering performance within a minimal footprint

Applications

• Precision instrumentation signal conditioning
• Data acquisition system anti-aliasing filters
• Industrial control loop filtering

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm RoHS compliance status and specific manufacturing lot details against official datasheets. Ensure storage conditions align with semiconductor handling standards to maintain device integrity prior to assembly.

Selection Notes

Select this component when high-order elliptic attenuation is required without discrete passive components. Verify that the available clock frequency allows for the desired 25 kHz cutoff ratio. Ensure the operating environment remains within the specified commercial temperature range.

Part Context

This part belongs to the MAX291/MAX292/MAX293 family of switched-capacitor filters. While sharing similar architectural principles, the MAX293 specifically offers elliptic response characteristics distinct from the Chebyshev or Bessel responses found in other series members. It serves as a specialized solution for applications demanding steep roll-off characteristics.

Replacement Considerations

MAX293ESA+T

FAQ

What determines the filter's cutoff frequency?

The cutoff frequency is determined by the ratio of the external clock frequency to the internal capacitor network, typically requiring a clock approximately 50 times the cutoff frequency.

Is manual reset functionality included?

No, the MAX293CSA does not include a manual reset pin; it relies on power-up initialization for state setting.