LTC1067-50CS#PBF

Overview

The LTC1067-50CS#PBF is a dual, rail-to-rail, very low noise universal switched-capacitor filter building block manufactured by Analog Devices Inc. It integrates two identical second-order sections within a 16-lead narrow SSOP package. The device operates from a single supply ranging from 2.7V to 11V or dual supplies up to ±5.5V. It features a fixed internal clock-to-center frequency ratio of 50:1, allowing center frequencies to be tuned via an external clock source. The typical supply current is approximately 1mA at 3.3V, offering lower power consumption than the standard LTC1067 variant.

Feature Summary

• Dual second-order switched-capacitor architecture providing independent filter sections in a compact package
• Rail-to-rail input and output operation enabling full dynamic range utilization on low voltage single supplies
• Low power consumption with typical supply current of 1mA at 3.3V, suitable for battery-operated applications
• Universal filter functionality supporting notch, bandpass, highpass, lowpass, and allpass configurations through external resistor networks

Applications

• Notch filters for interference rejection
• Narrowband bandpass filters for signal selection
• Tone detection systems
• Noise reduction circuits

Procurement Notes

Verify the specific suffix CS#PBF against the manufacturer's latest documentation to confirm the commercial temperature grade (0°C to 70°C) and lead-free packaging status. Ensure the ordering information matches the exact pinout and electrical specifications required for the design, as variations exist between the standard LTC1067 and the low-power LTC1067-50 variants.

Selection Notes

Select this component when a low-power, dual-channel switched-capacitor filter is required for audio or instrumentation applications. The 50:1 clock ratio allows for higher center frequencies compared to the 100:1 ratio of the standard LTC1067 for a given clock speed. Verify that the application can accommodate the necessary external resistors and clock source to configure the desired filter modes and Q factors.

Part Context

This part belongs to the LTC1067 family of universal switched-capacitor filters. The LTC1067-50 variant is specifically optimized for lower power consumption, drawing approximately half the current of the standard LTC1067. Both devices share the same rail-to-rail performance and dual-section architecture but differ in their internal clock-to-center frequency ratios and power characteristics.

Replacement Considerations

The standard LTC1067CS#PBF serves as a functional alternative if lower power consumption is not a critical constraint, though it draws significantly more current. Designers must account for the difference in the clock-to-center frequency ratio (100:1 vs 50:1) when substituting components, as this affects the required external clock frequency for a specific cutoff.