LTC1067-50IS#PBF

Overview

The LTC1067-50IS#PBF is a dual switched-capacitor filter building block in a 16-lead SSOP package. It operates from a single 3V to –5V supply with a typical current of 1mA at 3.3V. The internal clock-to-center frequency ratio is fixed at 50:1, allowing center frequencies up to 40kHz. Key electrical parameters include a DC open-loop gain of 90dB, a gain-bandwidth product of 1.9MHz, and a slew rate of 0.8V/ms. Noise performance is under 40mVRMS for Q ≤ 5, with a dynamic range exceeding 80dB on a 3.3V supply.

Feature Summary

• Dual rail-to-rail second-order filter sections within a compact 16-lead SSOP package
• Low power consumption suitable for battery-operated applications
• High precision with low center frequency error and customizable external resistor ratios

Applications

• Notch filters
• Narrowband bandpass filters
• Tone detection systems
• Noise reduction circuits

Procurement Notes

Verify the IS suffix indicates industrial temperature range (-40°C to 85°C) and SSOP packaging. Confirm RoHS compliance via the PBF designation. Ensure the specific lot date code meets project requirements as availability may vary.

Selection Notes

Select this component when a lower power alternative to the standard LTC1067 is required. The 50:1 clock ratio allows higher center frequencies compared to the 100:1 variant. Verify that the maximum clock frequency limits align with the desired Q factor and operating voltage conditions.

Part Context

This part belongs to the LTC1067 family of universal switched-capacitor filters. It shares architectural similarities with the LTC1067 but offers reduced power consumption by utilizing a different internal clock division ratio. It serves as a versatile building block for designing complex analog filter responses.

Replacement Considerations

LTC1067CS#PBF

FAQ

What is the difference between the LTC1067 and LTC1067-50?

The LTC1067-50 consumes approximately half the current of the LTC1067 and features a 50:1 clock-to-center frequency ratio, whereas the LTC1067 has a 100:1 ratio.

Can the LTC1067-50 operate with a single supply?

Yes, it operates from a single supply ranging from 3V to 5V, or dual supplies up to ±5V.

How is the center frequency determined?

The center frequency is tuned by the external clock frequency applied to Pin 16, divided by the internal 50:1 ratio and modified by external resistors.