The **ADL5320ARKZ-R7** is a high-linearity, GaAs (Gallium Arsenide), InGaP (Indium Gallium Phosphide) Heterojunction Bipolar Transistor (HBT) driver amplifier. It is designed by Analog Devices to operate in the 400 MHz to 2700 MHz frequency range. --- ### ## Technical Specifications The following table summarizes the primary electrical characteristics of the ADL5320: | Parameter | Specification | | :--- | :--- | | **Frequency Range** | 400 MHz to 2700 MHz | | **Gain (at 2140 MHz)** | 13.2 dB | | **Output IP3 (OIP3)** | +42 dBm | | **Output P1dB** | +25.7 dBm | | **Noise Figure** | 4.2 dB | | **Supply Voltage (Vcc)** | 5 V | | **Supply Current** | 104 mA | | **Package Type** | SOT-89 (Small Outline Transistor) | --- ### ## Key Internal Architecture The ADL5320 is built using a specific semiconductor process that provides several advantages: * **InGaP HBT Technology:** The use of Indium Gallium Phosphide provides high thermal stability and ruggedness compared to standard Silicon or GaAs MESFETs. * **Internal Matching:** While the device requires external components for specific frequency tuning, it is designed for 50 $\Omega$ ease-of-use. * **Temperature Compensation:** It features integrated bias circuitry that maintains stable performance over a temperature range of −40°C to +85°C. ### ## Pin Configuration The device uses a standard 3-lead SOT-89 package: | Pin No. | Name | Description | | :--- | :--- | :--- | | 1 | RFIN | RF Input (requires DC blocking capacitor) | | 2 | GND | Ground Connection | | 3 | RFOUT/Vcc | RF Output and DC Bias Supply | --- ### ## Application Use Cases Because of its high linearity (OIP3) and moderate gain, the ADL5320 is typically used in: 1. **Wireless Infrastructure:** Power amplifier (PA) driver stages for GSM, W-CDMA, and LTE base stations. 2. **ISM Band Applications:** Industrial, Scientific, and Medical radio equipment. 3. **CATV/Broadband:** Systems requiring low distortion over a wide bandwidth. ### ## Usage Notes * **DC Biasing:** Since Pin 3 is both the RF Output and the DC input, an **RF Choke (Inductor)** must be used to provide the 5V DC while blocking RF from the power supply. * **Thermal Management:** The SOT-89 package relies on the ground lead (Pin 2) and the exposed paddle for heat dissipation. Ensure a solid thermal via connection to the PCB ground plane.