Linear slope VVA has low IIP3, is stable over temperature

October 28, 2014 // By Graham Prophet
Distributor RFMW has RFMD’s RFSA2013 VVA (voltage variable attenuator, or voltage-controlled attenuator), which is temperature compensated to provides a linear attenuation slope versus control voltage with very little sensitivity to temperature changes.

PIN diode designs suffer from large attenuation shifts over temperature. The RFMD RFSA2013's integrated temperature compensation overcomes this issue. Built on SOI technology, linearity exceeds that of FET based designs. IIP3 linearity of the RFSA2013 is >50 dBm. SOI also provides superior, class 1C ESD protection. With insertion loss of 2.6 dB and attenuation range of 30 dB, this attenuator serves 5V applications where temperature variations are a design concern. For 3.3V applications, the RFSA2023 provides the same performance. The device spans a frequency range of 50 MHz to 4 GHz.