LTC1068-200IG#TRPBF

Overview

The LTC1068-200IG#TRPBF is a clock-tunable, quad second-order switched-capacitor filter building block from Analog Devices. It integrates four matched, low-noise sections within a 28-lead SSOP package. The device features a fixed clock-to-center frequency ratio of 200:1. It operates on supply voltages ranging from 3.14V to 5.5V or ±5V. Key electrical parameters include a typical center frequency error of ±0.3%, a power supply current of 6.5mA at 4.75V, and a maximum clock frequency of 5.6MHz. The operating temperature range extends from -40°C to +85°C.

Feature Summary

• Integrates four identical second-order filter sections in a single surface mount package
• Features a fixed internal clock-to-center frequency ratio of 200:1 for precise tuning
• Supports multiple filter topologies including lowpass, highpass, bandpass, and notch configurations
• Operates with dual supplies, single 5V supply, or single 3.3V supply

Applications

• Dual matched fourth-order Butterworth lowpass filters
• Clock-tunable signal conditioning circuits
• High-performance universal active filter designs

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates tape and reel packaging when sourcing components. Confirm that the IG suffix corresponds to the industrial temperature range of -40°C to +85°C. Ensure compatibility with the 28-lead SSOP footprint during procurement planning.

Selection Notes

Select this component when a 200:1 clock-to-frequency ratio is required for lower cutoff frequencies compared to other family members. Consider the 28-lead SSOP package constraints and verify that the external clock source can support the necessary frequency ranges for the desired filter topology.

Part Context

This part belongs to the LTC1068 series of clock-tunable filter building blocks. Variants such as the LTC1068, LTC1068-50, and LTC1068-25 offer different nominal ratios of 100:1, 50:1, and 25:1 respectively. All share similar architectural features but differ in their clock-to-center frequency scaling factors.

Replacement Considerations

Direct functional substitutes within the same family include the LTC1068-200CG#TRPBF for commercial temperature range applications. Other ratios like LTC1068-50 or LTC1068-25 require circuit redesign due to different clock scaling factors.