MAX7400CSA+T

Overview

The MAX7400CSA+T is an 8th-order, lowpass, elliptic switched-capacitor filter (SCF) from Analog Devices/Maxim Integrated. It operates on a single +5V supply and provides a corner frequency range of 1Hz to 10kHz with a 100:1 clock-to-corner ratio. The device features a transition ratio of 1.5 and typical stopband rejection of 82dB. Supply current is 2mA in operating mode and reduces to 0.2µA in shutdown mode. It is housed in an 8-pin SO package and supports operation within a temperature range of -40°C to +85°C.

Feature Summary

• Provides sharp rolloff with high stopband rejection suitable for anti-aliasing applications
• Supports both self-clocking via external capacitor and external clock input for precise control
• Includes a dedicated offset adjustment pin for DC output level tuning
• Features a low-power shutdown mode that significantly reduces supply current

Applications

• ADC Anti-Aliasing
• Post-DAC Filtering
• Speech Processing
• Air-Bag Electronics
• CT2 Base Stations

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm the exact package type and temperature rating. Confirm whether the 'T' suffix indicates reel packaging or other handling specifications. Ensure compatibility with the required voltage levels and environmental conditions before finalizing procurement decisions.

Selection Notes

Select this component when an 8th-order elliptic response with a 1.5 transition ratio is required. It is appropriate for designs needing 82dB stopband rejection and operation from a single +5V supply. Consider the internal oscillator or external clock options based on the desired cutoff frequency precision and system synchronization requirements.

Part Context

This part belongs to the MAX7400 family of switched-capacitor filters, which includes variants like the MAX7403, MAX7404, and MAX7407. These devices share similar architectures but differ in operating voltage (+5V vs +3V) and filter characteristics (transition ratios of 1.5 vs 1.2). The MAX7400 specifically targets +5V applications requiring steep rolloff.

Replacement Considerations

Direct substitutes include MAX7400ESA, MAX7400CPA, and MAX7400EPA, which offer identical electrical performance but vary in package style (SOIC vs DIP) and operating temperature range.