LT1568CGN#TRPBF

Overview

The LT1568CGN#TRPBF is a high-frequency active RC filter building block manufactured by Analog Devices Inc. It integrates two matched 2-pole Butterworth lowpass filters with unity gain in a single 16-lead SSOP package. The device operates from a single 3V (minimum 2.7V) to –5V supply, featuring rail-to-rail inputs and outputs. Internal capacitors are trimmed to –0.75%, ensuring consistent frequency responses. Key electrical parameters include a cutoff frequency range of 0.2MHz to 10MHz, a typical signal-to-noise ratio of 92dB at 2MHz, and total harmonic distortion of –84dB. Supply current is approximately 26mA at 5V, reducing to 0.5mA in shutdown mode.

Feature Summary

• Integrates two matched 2nd-order filter sections on a single die for superior channel matching compared to discrete components.
• Provides flexible configuration options including single-ended or differential outputs and various transfer functions such as Butterworth, Chebyshev, or Bessel.
• Features a dedicated shutdown mode that significantly reduces supply current consumption when the device is not in use.

Applications

• Antialiasing and reconstruction filters for high-speed data communications systems
• Dual or I-and-Q channel filtering requiring matched second-order responses
• Single-ended to differential signal conversion for driving high-speed A/D converters

Procurement Notes

Verify the specific ordering suffix to confirm the package type and temperature range. Ensure the component meets RoHS compliance requirements if mandated by your design specifications. Cross-reference the manufacturer part number with official distributor catalogs to confirm availability and authenticity before procurement.

Selection Notes

Select this component when designing high-frequency active filters requiring precise amplitude and phase matching between channels. It is suitable for applications needing a simple resistor-based cutoff frequency adjustment up to 10MHz. Consider the shutdown feature for power-sensitive designs where low standby current is required.

Part Context

This part belongs to the LT1568 family of very low noise, high-frequency active RC filter building blocks. The CGN suffix indicates a commercial temperature range variant housed in a narrow 16-lead SSOP package. It serves as a replacement for discrete RC active filters and LC filter modules in compact circuit designs.

Replacement Considerations

LT1568IGN#TRPBF