LTC6603IUF#TRPBF

Overview

The LTC6603IUF#TRPBF is a dual, matched, programmable lowpass filter designed for communications systems. It operates from a 2.7V to 3.6V analog supply and accepts input voltages up to 5.5V. The device features a 9th-order linear phase response with a maximum programmable bandwidth of 2.5MHz. Filter cutoff frequency is set via an external resistor (RBIAS) or an external clock, offering accuracy within ±3.5%. Gain is programmable to 0dB, 6dB, 12dB, or 24dB. Key electrical specifications include –145dBm/Hz input-referred noise at 24dB gain, –75dBc distortion at 200kHz, and tight channel matching of ±1.5° phase and ±0.2dB gain. It is housed in a 24-lead 4mm × 4mm QFN package.

Feature Summary

• Dual matched channels with guaranteed phase and gain matching for I/Q applications
• Programmable bandwidth up to 2.5MHz using a single external resistor or external clock
• Differential rail-to-rail inputs and outputs for simple system interfacing
• Low power shutdown mode controlled via serial interface

Applications

• 2.5MHz I and Q Lowpass Filter and Dual ADC interfaces
• Small/Low Cost Basestations including IDEN, PHS, TD-SCDMA, CDMA2000, WCDMA, and UMTS
• 802.11x Receivers
• Low Cost Repeaters, Radio Links, and Modems

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates tape and reel packaging when sourcing this component. Confirm that the IUF variant meets the required –40°C to 85°C operating temperature range for your application environment. Ensure compatibility with the 24-lead 4mm × 4mm QFN footprint during PCB layout.

Selection Notes

Select the LTC6603IUF#TRPBF for designs requiring precise phase matching between two filter channels. The internal oscillator allows cutoff frequency programming via a single resistor, simplifying bill of materials. Verify that the required gain settings (0dB to 24dB) and input voltage ranges (up to 5.5V) align with the system signal levels.

Part Context

This component belongs to the LTC6603 family of dual programmable lowpass filters. The IUF designation specifies the industrial temperature grade (-40°C to 85°C), while the UF suffix denotes the 24-lead 4mm × 4mm plastic QFN package. The #TRPBF suffix indicates lead-free finish and tape and reel shipping configuration.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.