The TB76xxTU range of MMICs (monolithic microwave integrated circuits) integrate a low noise amplifier (LNA) and bypass circuitry into a UF6 package measuring just 2.0mm x 2.1mm x 0.7mm. For extremely limited space requirements the MMIC line-up is also available (as the TB76xxCTC) in a leadless CST6C package measuring 1.5mm x 1.2mm x 0.4mm). These MMICs can reduce the circuitry and external component count required to ensure high gain operation when input signals are weak and low power bypass operation when signal strength improves. Switching between LNA and bypass mode operation is achieved via a single mode control voltage input.
Toshiba’s TB76xxTU series operates up to a frequency range of 40MHz to 1GHz and comprises nine devices (xx = 00 to 08, denoting different options with respect to LNA performance). There is a choice between LNA mode gains from 10dB to 15dB, noise figures between 1.3dB and 2.8dB, and different distortion behaviour.Typical IIP3 value is +8dBm in the best case.
All of the devices are designed to operate with a power supply input of between 2.3V and 3.3V. Operating current in LNA mode can be as low as 2.7mA while pass-through mode current consumption will be below 3µA with insertion losses of 2dB.