PE43503MLI-Z

Overview

The PE43503MLI-Z is a high linearity, 5-bit RF Digital Step Attenuator (DSA) manufactured by pSemi. It provides a variable attenuation range of 31 dB in 1 dB steps across a frequency spectrum from 9 kHz to 6 GHz. The device features a characteristic impedance of 50 Ω and utilizes UltraCMOS™ technology on a sapphire substrate for enhanced performance. It operates with a serial-addressable CMOS control interface and maintains high attenuation accuracy over varying frequencies and temperatures. The component is housed in a 24-lead QFN package with dimensions of 4x4 mm and a height of 0.75 mm.

Feature Summary

• High linearity performance utilizing UltraCMOS™ silicon-on-insulator technology on a sapphire substrate
• Serial-addressable CMOS control interface for digital step attenuation
• Maintains high attenuation accuracy across wide frequency and temperature ranges

Applications

• RF signal conditioning in wireless communication systems
• Test and measurement equipment requiring precise attenuation
• Phased array antenna beamforming networks

Procurement Notes

Verify the specific ordering code suffix against the manufacturer's current documentation to ensure compliance with RoHS standards and lead finish specifications. Confirm that the 24-VFQFN package variant matches the design-in requirements for thermal dissipation and footprint compatibility. Cross-reference the part number with official pSemi databases to validate availability status and any potential obsolescence notices prior to final procurement decisions.

Selection Notes

Select this component when a 31 dB attenuation range with 1 dB resolution is required within the 6 GHz bandwidth. Ensure the application supports the serial CMOS control interface and operates within the specified temperature range. Consider the 50 Ω impedance match for system integration. Verify that the power handling capabilities align with the maximum input power limits defined in the datasheet for continuous wave operation.

Part Context

The PE43503MLI-Z belongs to the Peregrine series of RF Digital Step Attenuators from pSemi. This family leverages patented UltraCMOS™ technology to deliver high linearity and low insertion loss. The product line includes various bit-depth options tailored for different attenuation needs. The PE43503 specifically targets applications requiring moderate attenuation ranges with precise digital control, distinguishing it from higher-range counterparts like the PE43501.

Replacement Considerations

Direct substitutes include other 5-bit DSAs from the same manufacturer family, such as the PE43501MLI-Z, provided the attenuation range and pinout compatibility are verified. Check for equivalent parts from other vendors offering similar 5-bit, 50 Ω specifications within the 6 GHz range. Ensure that any replacement maintains the same package footprint and control interface logic.