LTC6602CUF#TRPBF

Overview

The LTC6602CUF#TRPBF is a dual, matched, programmable bandpass or lowpass filter and differential driver manufactured by Analog Devices Inc. It operates on a single 2.7V to 3.6V supply with a maximum input voltage of 5.5V. The device features a guaranteed gain matching of ±0.2dB and phase matching within 2 degrees between channels. Filter cutoff frequencies are set via a single resistor (RBIAS) for accuracy within ±3%, or controlled externally via clock. Gain is programmable to 1×, 4×, 16×, or 32×. It includes a low power shutdown mode consuming approximately 170µA and utilizes a 24-lead, 4mm × 4mm QFN package.

Feature Summary

• Dual matched filter channels with guaranteed phase matching to within 2 degrees
• Configurable as 5th order lowpass or bandpass with programmable gain settings
• Fully differential inputs and outputs with rail-to-rail capability
• Low noise performance with input referred noise down to -146dBm/Hz

Applications

• UHF RFID Reader Dual Baseband Filter and Dual ADC
• Multiprotocol RFID Readers including EPC-GEN2, ISD and IPX
• IDEN, PHS, GSM Basestations
• Wireless Telemetry Systems

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing this component. Confirm the CU designation corresponds to the commercial temperature range of 0°C to 70°C. Ensure the ordering information matches the exact part number to avoid confusion with the industrial grade variant. Cross-reference the manufacturer's official documentation for any updates regarding lead-free finish specifications.

Selection Notes

Select this component for applications requiring highly matched dual filters, such as transceiver I and Q channels. Consider the RBIAS resistor value to determine the internal oscillator frequency if not using an external clock source. Evaluate the programmable gain options against the required signal dynamic range. Verify that the supply voltage constraints align with the system power architecture.

Part Context

This component belongs to the LTC6602 family of dual matched filters. The CU suffix denotes the commercial temperature grade, while the UF indicates the 24-lead plastic QFN package. The TRPBF suffix specifies the tape and reel shipping format. This series is designed for high-frequency filtering applications requiring precise channel matching.

Replacement Considerations

The LTC6602IUF#TRPBF serves as the industrial temperature grade replacement, operating from –40°C to 85°C. Verify that the thermal requirements of the application are met before substituting the commercial grade part with the industrial version.

FAQ

How is the filter cutoff frequency determined?

The cutoff frequencies can be set using a single resistor connected to the RBIAS pin, providing a guaranteed accuracy of 3%. Alternatively, they can be controlled using an external clock source.

What is the function of the CLKCNTL pin?

The CLKCNTL pin selects the function of the CLKIO pin. Tying it to ground enables external clock input, floating it disables the master clock output, and tying it to V+D enables the internal oscillator and outputs the clock.

Can the highpass filter be bypassed?

Yes, the highpass filters can be bypassed to configure the device for lowpass functionality only.