LTC1067CS#PBF

Overview

The LTC1067CS#PBF is a dual, rail-to-rail, very low noise universal switched-capacitor filter building block in a 16-lead SO package. It contains two identical second-order sections capable of realizing bandpass, highpass, lowpass, notch, and allpass functions using three to five external resistors per section. The center frequency is tuned by an external clock with a nominal 100:1 ratio for the LTC1067. It operates from a single 3V to –5V supply, providing over 80dB dynamic range on a 3.3V supply. Typical power supply current is 4.5mA at 250kHz clock frequency.

Feature Summary

• Dual second-order switched-capacitor architecture enabling complex filter synthesis
• Rail-to-rail input and output operation across wide supply ranges
• Low noise performance suitable for precision signal processing applications

Applications

• Notch filters for interference rejection
• Narrowband bandpass filters for tone detection
• Noise reduction systems requiring high dynamic range

Procurement Notes

Verify the specific suffix CS#PBF against the manufacturer's official documentation to confirm the exact package type (SO) and temperature grade (Commercial). Ensure the ordering information matches the required pinout and electrical specifications for your design implementation.

Selection Notes

Select this component when a dual second-order universal filter is needed with rail-to-rail capabilities. Compare the 100:1 clock-to-center frequency ratio against the LTC1067-50 if lower power consumption is prioritized over maximum center frequency range. Verify that the required center frequency falls within the 0.001 to 20 kHz operational range.

Part Context

This device belongs to the LTC1067/LTC1067-50 family of universal switched-capacitor filters. It serves as a building block for designing higher-order filters by cascading multiple units. The CS variant specifically denotes the commercial temperature range and SO package format.

Replacement Considerations

LTC1067-50CS#PBF offers similar functionality with a 50:1 clock ratio and lower power consumption. LTC1067CGN#PBF provides the same electrical characteristics but in a 16-lead SSOP package instead of the SO package.