pSemi UltraCMOS® RF Digital Step Attenuators
pSemi UltraCMOS® RF Digital Step Attenuators (DSAs) offer flexibility and performance for wireless and broadband infrastructure equipment, LMRs, test-and-measurement equipment, and military RF applications. pSemi UltraCMOS RF DSAs are offered in 50Ω and 75Ω variants, with multiple programming mode options, including serial, direct parallel, and latched parallel, making it easy to design them into a wide range of systems. These devices offer leading linearity, outstanding attenuation accuracy, and low insertion loss.
Glitch-less DSAs
The 75Ω PE4314 and the 50Ω PE43711, PE43712, and PE43713 DSAs offer glitch-less attenuation state transitions. When switching attenuation states with a DSA, there is a brief "glitch" or transient spike in output power. This glitch, if left alone, could lead to degraded signal quality and possible damage to power amplifier sub-assemblies. To minimize this glitch, engineers deploy a software or firmware workaround that reduces the effect of this transient spike. With these glitch-less DSAs, this output power glitch is significantly reduced to less than 0.5dB, decreasing engineering overhead and preventing damage to expensive sub-assemblies.
Features
- Excellent attenuation accuracy
- Low insertion loss and high linearity
- 75Ω and 50Ω variants
- Serial, direct parallel, and latched parallel programming options
- Glitch-less options available
Applications
- Wireless infrastructure
- Distributed antenna systems
- Broadband equipment
- Test-and-measurement equipment
Specifications
- 15.5dB to 31.75dB attenuation
- 2GHz to 55GHz maximum frequency
- 50Ω or 75Ω impedance
- 0.25dB to 18dB attenuator step size
Standard DSA Specifications
Glitch-Less DSA Specifications
Additional Resource
Development Tools
pSemi RF DSA Evaluation Kits
Demonstration and development platform for the UltraCMOS® RF Digital Step Attenuators (DSAs).