LTC1067IGN#TRPBF

Overview

The LTC1067IGN#TRPBF is a dual, rail-to-rail, very low noise universal switched-capacitor filter building block in a 16-lead SSOP package. It contains two identical second-order sections tunable by an external clock. The nominal clock-to-center frequency ratio is 100:1. Operating from a single 3V to –5V supply, it delivers over 80dB dynamic range with typical center frequency error below –0.2%. Supply current is typically 4.5mA at 4.75V and 250kHz. It supports multiple operating modes for notch, bandpass, highpass, and lowpass configurations.

Feature Summary

• Dual second-order switched-capacitor building blocks with rail-to-rail input and output operation
• Clock-tunable center frequency with customizable ratios via external resistors
• Double sampled architecture that places aliasing components at twice the clock frequency
• Multiple operating modes including Mode 1, 1b, 2, 2n, 3, and 3a for versatile filter synthesis

Applications

• Notch filters for interference rejection
• Narrowband bandpass filters for tone detection
• Noise reduction systems requiring precise frequency response
• High precision fourth-order filter cascades

Procurement Notes

Verify the specific IGN suffix indicates the industrial temperature grade (-40°C to +85°C) and SSOP-16 package configuration against the manufacturer's official ordering guide. Confirm the TRPBF designation corresponds to the tape and reel packaging format required for automated assembly processes.

Selection Notes

Select this component when a dual-channel, clock-tunable active filter is required without external capacitors. Ensure the application can provide a clean square-wave clock source, as performance depends heavily on clock quality. Verify that the required center frequency range falls within the 0.001 to 20 kHz limit for optimal stability and Q accuracy.

Part Context

This device belongs to the LTC1067 family of universal switched-capacitor filters. It shares architectural similarities with the LTC1068 but offers dual sections in a smaller footprint compared to quad-channel alternatives. The IGN variant specifically denotes the industrial temperature range and plastic SSOP packaging suitable for general-purpose analog signal processing.

Replacement Considerations

LTC1067-50IGN#TRPBF offers lower power consumption with a 50:1 clock ratio. For quad-channel requirements, consider the LTC1068 series. Verify pin compatibility and clock frequency scaling differences before substituting.