LTC1563-2CGN#PBF

Overview

The LTC1563-2CGN#PBF is a fourth-order active RC lowpass filter in a 16-lead SSOP package. It provides a unity-gain Butterworth response using a single external resistor, with cutoff frequencies adjustable from 256Hz to 256kHz via the formula R = 10k(256kHz/fC). The device operates on a single 3V (2.7V minimum) to ±5V supply and features rail-to-rail inputs and outputs. Key electrical parameters include a typical DC offset of less than 1mV, a power supply current of 8mA to 14mA in high-speed mode, and a shutdown current of 12µA. Cutoff frequency accuracy is typically within ±1.5%.

Feature Summary

• Single-resistor cutoff frequency setting for simplified design
• Rail-to-rail input and output voltage swing capabilities
• Low power and shutdown modes for energy efficiency
• Cascadable dual sections for higher order filtering

Applications

• Discrete RC active filter replacement
• Antialiasing filters for data acquisition systems
• Smoothing or reconstruction filters
• Linear phase filtering for data communication
• Phase locked loops

Procurement Notes

Verify the specific suffix CGN indicates the commercial temperature range (0°C to 70°C) and SSOP-16 package. Confirm PBF denotes lead-free compliance. Ensure the ordering code matches the required transfer function variant, as the -2 suffix specifies the Butterworth response configuration.

Selection Notes

Select this component when a fixed Butterworth response is required without complex resistor networks. Verify that the desired cutoff frequency falls within the 256Hz to 256kHz range for standard operation. Consider the Low Power mode if supply current reduction is critical for lower frequency applications.

Part Context

This part belongs to the LTC1563 family of active RC filters. The -2 designation specifically identifies the Butterworth response variant, distinct from the -3 Bessel variant. It shares the same physical package and pinout but differs internally in capacitor matching to achieve the specific frequency response characteristics.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.