Toshiba Electronics Europe has announced a new family of miniature, low noise amplifiers that provide good linearity and low current consumption in VHF-UHF wide band applications where input signal strengths may be variable.
The new SiGe cellpack devices are suitable for stationary and mobile terrestrial tuner applications where they can be used to improve dynamic range and minimise distortion while reducing power consumption and component density.
The TB76xxTU range of MMICs (monolithic microwave integrated circuits) integrate a low noise amplifier (LNA) and bypass circuitry into a UF6 package measuring just 2.0 mm x 2.1 mm x 0.7 mm. For limited space requirements the MMIC line-up is also available (as the TB76xxCTC) in a leadless CST6C package measuring 1.5 mm x 1.2 mm x 0.4 mm). 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 40 MHz to 1 GHz 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 10 dB to 15 dB, noise figures between 1.3 dB and 2.8 dB, and different distortion behaviour.Typical IIP3 value is +8 dBm in the best case.
All of the devices are designed to operate with a power supply input of between 2.3 V and 3.3 V. Operating current in LNA mode can be as low as 2.7 mA while pass-through mode current consumption will be below 3 uA with insertion losses of 2 dB.
Related link: www.toshiba-components.com