LTC1566-1IS8#PBF

Overview

The LTC1566-1IS8#PBF is a 7th order continuous time lowpass filter with 12dB passband gain, housed in an 8-lead plastic SO package. It operates on a single 5V or ±5V supply within the -40°C to 85°C temperature range. The device features differential inputs and outputs, requiring no external components. Key electrical parameters include a cutoff frequency of 2.3MHz, 62µVRMS input referred noise (50kHz to 2MHz bandwidth), and 40dB attenuation at 1.5 × fCUTOFF. Supply current is typically 24mA at 5V and 25mA at ±5V.

Feature Summary

• Differential signal interface simplifies integration with wireless systems and demodulators
• Adjustable output DC common mode voltage and offset for optimized A/D converter driving
• High linearity and dynamic range suitable for demanding data acquisition applications

Applications

• WCDMA basestations
• Communication filters
• Antialiasing filters
• Smoothing or reconstruction filters
• Matched filter pairs for transceiver I and Q channels

Procurement Notes

Verify the specific IS suffix indicates the industrial temperature range (-40°C to 85°C) compared to the CS variant. Confirm the PBF designation ensures lead-free compliance. Cross-reference the manufacturer's official documentation for any updates regarding RoHS status or pinout configurations before finalizing procurement orders.

Selection Notes

Select this component when a fixed 2.3MHz cutoff frequency with high selectivity is required without external tuning components. The differential architecture is optimal for rejecting common-mode noise in sensitive receiver front-ends. Ensure the system power supply supports the specified single or dual voltage requirements to maintain the stated dynamic range specifications.

Part Context

This part belongs to the LTC1566 family of continuous time filters designed for data communications. It serves as a direct replacement for bulky LC filters in compact designs. The IS8#PBF variant specifically denotes the industrial temperature grade and surface-mount packaging, distinguishing it from commercial grades or through-hole options.

Replacement Considerations

The LTC1566-1CS8#PBF is the commercial temperature equivalent. For different cutoff frequencies, consider the LTC1565-31 or LTC1569 series. Verify that substitute parts maintain the required differential I/O configuration and 12dB gain characteristics to ensure circuit compatibility.