Temperature Compensating Attenuators

RFMD's RFSA4013 and RFSA4023 are fully monolithic analog temperature compensating attenuators (TCA) featuring exceptional linearity over their entire gain control range. They are designed to offset the gain reduction of an RF component over temperature without the need for closed loop feedback. Three customer selectable temperature coefficients make them a flexible solution for RF lineups. They incorporate revolutionary new circuit architecture to solve a long standing industry problem with regards to attenuator architecture: high IP3, low DC current and broad bandwidth. Traditional approaches for solving this problem require expensive co-fired ceramics with temperature sensitive materials or current hungry PIN diodes with elaborate area consuming control circuits. These temperature compensating attenuators require only a single supply voltage and two logic bits to set control attenuation slope versus temperature.