AN-UHF-130 is an application note for Silicon RF Power Semiconductors. It introduces RD04HMS2 & RD70HUF2 two-stage amplifier
The document provides an overview of the RDO4HMS2 and RD70HUF2 two‑stage RF power amplifiers, including their key features such as a 330‑400 MHz operating frequency, 12.5 V supply voltage, and output power of 79‑85 W. It also lists the quiescent and operating currents and the dimensions of the evaluation board (82.5 mm × 60.0 mm).
Detailed sections cover the equivalent circuitry, a complete component list with part numbers, standard land‑pattern dimensions, PCB layout drawings, and typical RF performance graphs (frequency response, output power versus input power, supply voltage, and gate voltage). The note is intended for engineers evaluating the amplifiers for RF applications.
| Operating frequency | 330‑400 MHz |
|---|---|
| Supply voltage (Vdd) | 12.5 V |
| Input power | 0.2 W |
| Output power | 79‑85 W |
| Quiescent current (RDO4HMS2) | 0.1 A |
| Quiescent current (RD70HUF2) | 1 A |
| Operating current | 9.5‑11 A |
| Evaluation board size | 82.5 mm × 60.0 mm |
They operate from 330 MHz to 400 MHz.
A 12.5 V supply (Vdd) is required.
The output power ranges between 79 W and 85 W.
RDO4HMS2 draws 0.1 A and RD70HUF2 draws 1 A in quiescent mode.