LTC1068-200CG#PBF

Overview

The LTC1068-200CG#PBF 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 single supply or ±5V dual supply. Key electrical parameters include a typical center frequency error of ±0.3%, power supply current of 8mA at ±5V, and a maximum clock frequency of 5.6MHz. The component supports lowpass, highpass, bandpass, and notch filter configurations.

Feature Summary

• Integrates four identical second-order filter sections in a compact surface mount package
• Provides precise clock tuning with minimal center frequency error
• Supports multiple operating modes for versatile filter topology implementation
• Operates efficiently across standard single and dual voltage supplies

Applications

• Dual matched fourth-order Butterworth lowpass filters
• Clock-tunable bandpass and notch filter circuits
• Universal low noise eighth order filter building blocks

Procurement Notes

Verify the specific suffix CG#PBF against official manufacturer documentation to confirm the commercial temperature range and lead-free finish specifications. Ensure the ordering information matches the required package type and operational limits defined in the datasheet before finalizing procurement.

Selection Notes

Select this variant when a 200:1 clock-to-center frequency ratio is required. Compare performance metrics such as noise levels and maximum Q against other family members like the LTC1068-50 or LTC1068-25 if different frequency ranges are needed. Confirm that the external clock source can meet the maximum frequency requirements for the desired filter mode.

Part Context

This component belongs to the LTC1068 series of universal switched-capacitor filters. The series includes variants with different nominal ratios, specifically the LTC1068 (100:1), LTC1068-50 (50:1), and LTC1068-25 (25:1). All members share similar internal architectures but differ in their default clock tuning characteristics and supported frequency ranges.

Replacement Considerations

LTC1068-200IG#PBF offers the same functional specifications with an extended industrial temperature range.