RFMD’s new RFSA2514/2524 5-bit digital step attenuators (DSAs) feature high linearity over their entire gain control range with excellent step accuracy in 0.5dB (RFSA2514) or 1 dB (RFSA2524) steps. They are programmed via a serial mode control interface that is both 3 and 5 V compatible.

They also offer a rugged Class 1 C HBM ESD rating via on-chip ESD circuitry. The MCM package is footprint-compatible with most 24-pin, 4 mm x 4 mm, QFN packages.

  • Frequency Range 50MHz to 4000MHz
  • Attenuation Range and Step
  • RFSA2514: 15.5dB, 0.5dB
  • RFSA2524: 31dB, 1dB
  • Step Accuracy: +/-(0.1dB + 5% attenuation range)
  • Insertion Loss: 1.2dB @ 2GHz
  • High Linearity: IIP3 >48dBm For All Steps
  • 3V and 5V Logic-Compatible
  • Serial Programming Interface
  • Power-Up Programming Modes


  • Transceiver RF and IF Applications
  • 2G, 3G, LTE, WiMax/WiFi
  • Wireless Data, Satellite Terminals
  • Test Equipment

Both the RFSA2514 and RFSA2524 are currently available in production quantities. Pricing begins at $1.60 each for 750 pieces.

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