LTC1562ACG#PBF

Overview

The LTC1562ACG#PBF is a low noise, low distortion continuous-time active RC quad universal filter manufactured by Analog Devices Inc. It features four independent second-order filter blocks capable of center frequencies from 10kHz to 150kHz without requiring an external clock. The device operates on a total supply voltage ranging from 4.75V to 10.5V and utilizes rail-to-rail inputs and outputs. The A-grade variant provides a typical center frequency accuracy of –0.3%. Each block allows for resistor-programmable center frequency (fO), quality factor (Q), and gain, supporting various response shapes including lowpass, bandpass, highpass, allpass, notch, and elliptic.

Feature Summary

• Four matched second-order filter sections with rail-to-rail input and output capabilities
• Continuous-time operation eliminating the need for external clocks
• Resistor-programmable center frequency, Q, and gain parameters
• Zero-power shutdown mode for power conservation

Applications

• High resolution systems (14 bits to 18 bits)
• Antialiasing and reconstruction filters
• Data communications and equalizers
• Dual or I-and-Q channels using two matched fourth-order filters in one package
• Linear phase filtering applications

Procurement Notes

Verify the specific ordering suffix #PBF indicates tube packaging when sourcing this component. Confirm that the AC grade designation ensures the tighter center frequency accuracy specifications compared to standard grades. Ensure compatibility with the SSOP-20 package footprint during procurement planning.

Selection Notes

Select the LTC1562ACG#PBF when precise center frequency accuracy is critical, as the A grade offers typical accuracy of –0.3%. Consider the operating temperature range and supply voltage requirements against the electrical characteristics. Evaluate the need for rail-to-rail signal handling and the availability of multiple filter responses within a single package.

Part Context

This component belongs to the LTC1562 family of very low noise, low distortion active RC quad universal filters. It is designed for applications where dynamic range is important, allowing users to cascade second-order sections to form higher-order filters such as dual fourth-order Butterworth lowpass filters.

Replacement Considerations

The LTC1562CG serves as a standard grade alternative with slightly different center frequency accuracy specifications. The LTC1562IG is available for wider industrial temperature ranges. Verify pinout and functional compatibility before substituting.