The ADL8108 from Analog Devices is a Low Noise Amplifier (LNA) that operates from 1 to 8 GHz. It is manufactured using pHEMT technology and integrates input and output AC-coupling capacitors, a bias inductor, and an adjustable drain current via an external RBIAS resistor, reducing the number of required external components. This LNA provides a small-signal gain of 20 dB with a noise figure of 1 dB. It delivers a saturated output power of up to 23 dBm and has input and output return losses of more than 9.5 dB and 13 dB, respectively. It also integrates a temperature sensor and an enable/disable control with switching times of 15 ns (ON) and 10 ns (OFF).
The ADL8108 requires a 3 to 5.5 V DC supply and draws a quiescent current of 90 mA. This RoHS-compliant LNA is available in a 3 × 3 mm, 16-lead LFCSP package and operates over a temperature range from -55°C to +125°C. It is ideal for telecommunications, test instrumentation, and military applications.
