This application note introduces a new chip-size packaging technology that enables power integrated circuits to be surface mount devices (SMDs), thus significantly reducing assembly costs and the size of power amplifier modules
This document describes the PD54008L-E, an 8 W - 7 V LDMOS device housed in a PowerFLAT package, designed for wireless meter reading applications. It details the system architecture involving a Data Transmission Unit (DTU) and Data Collector Unit (DCU) for gas, water, and electricity meters.
The note provides circuit design considerations, including source and load impedances, a bill of materials, and PCB layout guidelines. It presents characterization results showing power gain, input return loss, and drain efficiency over the 445 to 475 MHz frequency band.
| Power Output | 8 W |
|---|---|
| Supply Voltage | 7 V |
| Frequency Band | 450 + 470 MHz |
| Output Power | 36 dBm |
| Gain Flatness | < 1dB |
| Package Type | PowerFLAT |
| Minimum Gain | 12 dB |
| Input Return Loss | better than 5 dB |
| Drain Efficiency | 55% to 65% |
The device operates in the frequency band of 450 to 470 MHz.
The electrical requirements specify a supply voltage (Vpp) of 5 V and a quiescent current (IDQ) of 10 mA.
After tuning for best performance, the amplifier achieves a minimum gain of 12 dB.