MAX293CSA+T

Overview

The MAX293CSA+T is an active, eighth-order, lowpass elliptic switched-capacitor filter manufactured by Analog Devices Inc. under the Maxim Integrated brand. It operates with a clock frequency of 100 times the cutoff frequency and supports a cutoff frequency of 25 kHz. The device functions on a single supply voltage ranging from 4.75 V to 11 V. It is housed in an 8-pin SOIC package and is rated for operation within a temperature range of 0°C to +70°C. This component integrates the necessary circuitry for precise analog signal filtering without requiring external inductors.

Feature Summary

• Provides high-selectivity elliptic filter response characteristics for effective noise rejection
• Utilizes switched-capacitor technology to eliminate the need for external passive components such as inductors
• Features programmable cutoff frequency determined by an external clock input

Applications

• Data acquisition systems requiring anti-aliasing filtering
• Instrumentation circuits needing precise signal conditioning
• Industrial control systems utilizing analog sensor inputs

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing. Confirm that the manufacturer designation aligns with Analog Devices or Maxim Integrated, as legacy branding may vary. Ensure the part number matches the exact electrical specifications required for the target application before finalizing procurement orders.

Selection Notes

Select this component when an eighth-order elliptic response is required for steep roll-off applications. Ensure the available clock source can provide a stable frequency at least 100 times the desired cutoff frequency. Verify that the system power supply remains within the 4.75 V to 11 V operating range to maintain specified performance levels.

Part Context

This component belongs to the MAX291/MAX292/MAX293 family of switched-capacitor filters. While the MAX291 offers a Butterworth response and the MAX292 provides a Chebyshev response, the MAX293 specifically delivers an elliptic response with passband ripple. All three share similar pinouts and operational principles but differ in their frequency domain characteristics.

Replacement Considerations

Direct replacements include the MAX291CSA+T for a Butterworth response and the MAX292CSA+T for a Chebyshev response. These parts share identical pin configurations and electrical requirements, allowing for physical interchangeability if the specific filter characteristic change is acceptable for the design.