LTC1563-2IGN#TRPBF

Overview

The LTC1563-2IGN#TRPBF is a fourth-order active RC lowpass filter family member manufactured by Analog Devices Inc. It provides a unity-gain Butterworth response using a single external resistor value, with cutoff frequencies adjustable from 256Hz to 256kHz via the formula R = 10k(256kHz/fC). The device operates on a single supply voltage ranging from 2.7V to 11V or dual supplies up to ±5V. Key electrical characteristics include rail-to-rail input and output capabilities, a typical DC offset of less than 1mV, and a cutoff frequency accuracy within ±2%. It features two operating modes: High Speed and Low Power, where the latter reduces supply current significantly for lower frequency applications.

Feature Summary

• Provides a precise unity-gain Butterworth lowpass filter response configured with a single external resistor.
• Features rail-to-rail input and output stages suitable for low-voltage single-supply systems.
• Includes a dedicated Low Power mode that reduces supply current by an order of magnitude for energy-efficient designs.
• Offers a shutdown capability through the EN pin to minimize power consumption when inactive.

Applications

• Discrete RC active filter replacement in signal processing chains
• Antialiasing filters preceding analog-to-digital converters
• Smoothing or reconstruction filters in digital-to-analog outputs
• Linear phase filtering requirements in data communication systems

Procurement Notes

Verify the specific ordering suffix #TRPBF confirms lead-free tape and reel packaging. Confirm the IGN suffix corresponds to the industrial temperature range (-40°C to 85°C) and narrow SSOP-16 package. Ensure compatibility with the intended PCB footprint, as this package shares dimensions with SO-8. Cross-reference the datasheet revision to confirm pinout consistency before finalizing procurement orders.

Selection Notes

Select the LTC1563-2 variant specifically when a Butterworth frequency response is required, distinguishing it from the Bessel-response LTC1563-3. Evaluate the trade-off between High Speed and Low Power modes based on the target cutoff frequency and noise performance needs. Ensure the application load resistance remains above 10kΩ to maintain optimal output swing and distortion characteristics. Verify that the required cutoff frequency falls within the supported 256Hz to 256kHz range for standard resistor calculations.

Part Context

This component belongs to the LTC1563-X family of easy-to-use active RC filters designed for high-resolution systems up to 16 bits. The family includes variants like the LTC1563-3 for Bessel responses. These devices utilize a proprietary architecture that simplifies filter design by allowing cutoff frequency setting via a single resistor, eliminating the need for complex capacitor selection typically found in traditional active filter topologies.

Replacement Considerations

LTC1563-2IGN#TR