PE43650A-Z

Overview

The PE43650A-Z is a 5-bit digital step attenuator from the UltraCMOS series, designed for 50-ohm RF applications. It provides a total attenuation range of 15.5 dB with a least significant bit (LSB) step size of 0.5 dB. The device operates within a frequency range of 9 kHz to 6 GHz and exhibits a typical insertion loss of 2.4 dB. It features a serial-addressable CMOS control interface and is housed in a QFN-24 package.

Feature Summary

• Provides precise digital attenuation control with 32 discrete steps across a 15.5 dB range
• Operates over an ultra-wide frequency spectrum from near DC up to 6 GHz
• Features low insertion loss and high linearity suitable for signal integrity preservation
• Utilizes a standard serial CMOS interface for simple microcontroller integration

Applications

• RF front-end modules requiring variable gain or attenuation control
• Test and measurement equipment calibration circuits
• Wireless communication systems for dynamic signal level adjustment
• Phased array antenna beamforming networks

Procurement Notes

Verify the specific suffix 'Z' indicates lead-free compliance and tape-and-reel packaging configuration. Confirm the QFN-24 footprint dimensions against your PCB layout requirements. Ensure the serial control logic levels match your system voltage. Check for RoHS certification status if required by your manufacturing standards.

Selection Notes

Select this component when a wide bandwidth up to 6 GHz is required alongside fine 0.5 dB resolution. Compare insertion loss specifications against other attenuators if signal power budget is critical. Consider the QFN-24 package size constraints relative to available board space. Verify that the serial interface protocol aligns with your existing control architecture.

Part Context

This part belongs to pSemi's UltraCMOS family of RF integrated circuits. It complements other models like the PE43620 and PE43665 by offering a mid-range attenuation profile with higher frequency capability than lower-frequency variants. It serves as a key component in modern RF signal chains where digital programmability is essential.

Replacement Considerations

The PE43650A is the base model without the lead-free/reel suffix. For different attenuation ranges, consider the PE43620 (18 dB, 2-bit) or PE43665 (31.5 dB, 6-bit). Higher frequency options may require checking the PE43501MLI for 6 GHz operation with different pinout.