The ADI ADRF5515 Receiver Front-End utilizes high gain mode and power-down mode. In high gain mode, the cascaded two-stage LNA and switch offer a low noise figure of 1.0dB and a high gain of 33dB at 3.6GHz with an output third-order intercept point (OIP3) of 32dBm (typical). In low gain mode, one stage of the two-stage LNA is in bypass, providing 16dB of gain at a lower current of 36mA. In power-down mode, the LNAs are turned off, and the device draws 12mA.
In transmit operation, when RF inputs are connected to a termination pin (TERM-CHA or TERM-CHB), the switch provides a low insertion loss of 0.45dB. It handles long-term evolution (LTE) average power (9dB peak to average ratio (PAR)) of 43dBm for the entire lifetime operation. The ADRF5515 is pin-compatible with the ADRF5545A, 10W version, which operates from 2.4GHz to 4.2GHz.
The ADRF5515 does not require any matching components at the RF ports that are internally matched to 50Ω. The ANT and TERM ports are also internally ac-coupled. Therefore, only receiver ports require external dc blocking capacitors.
The ADRF5515 operates from 3.3GHz to 4.0GHz and is housed in a RoHS compliant, compact, 6mm × 6mm, 40-lead LFCSP package.