LTC1562AIG#TRPBF

Overview

The LTC1562AIG#TRPBF 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 between 10kHz and 150kHz. The device operates on a total supply voltage ranging from 4.75V to 10.5V. It provides rail-to-rail input and output capabilities with a typical DC offset accuracy of 3mV. The A-grade variant ensures a typical center frequency accuracy of -0.3%. Key electrical parameters include a typical signal-to-noise ratio of 97dB on a single 5V supply and a shutdown mode that minimizes power consumption.

Feature Summary

• Four independent second-order filter sections allow for flexible cascading configurations such as dual fourth-order filters or a single eighth-order filter.
• Rail-to-rail input and output stages maximize dynamic range and accommodate signals extending close to the power supply rails.
• Resistor-programmable architecture enables precise setting of center frequency, quality factor (Q), and gain using simple external components.
• Zero-power shutdown mode effectively disconnects the internal amplifiers to minimize current draw when the device is inactive.

Applications

• High resolution data acquisition systems requiring 14-bit to 18-bit precision
• Antialiasing and reconstruction filtering in digital signal processing chains
• Data communications channels and equalizers
• Dual or I-and-Q channel signal processing within a single package

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates tape and reel packaging upon procurement. Confirm the A-grade designation matches the required center frequency accuracy specifications for the application. Ensure the SSOP-20 package footprint aligns with the printed circuit board design constraints.

Selection Notes

Select this component when continuous-time filtering without clocking is required to avoid aliasing artifacts associated with switched-capacitor filters. The A-grade version is necessary for applications demanding tighter center frequency tolerances compared to standard grades. Consider the 10kHz to 150kHz operational range to ensure compatibility with the target signal bandwidth.

Part Context

This part belongs to the LTC1562 family of universal active filters. It shares the same core architecture and pinout with other grade variants like the LTC1562CG and LTC1562IG. The primary distinction lies in the manufacturing trim accuracy, where the A-grade offers superior center frequency precision over temperature and supply variations.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should verify pin compatibility and electrical parameter overlaps if considering alternative manufacturers' universal filters.