The **ADL5387ACPZ-R7** is a high-performance, broadband quadrature demodulator manufactured by Analog Devices. It is designed to convert Radio Frequency (RF) signals directly to baseband or low intermediate frequencies (IF). --- ## 1. Key Specifications The following table highlights the primary technical parameters of the ADL5387: | Parameter | Specification | | :--- | :--- | | **RF Frequency Range** | 30 MHz to 2 GHz | | **LO (Local Oscillator) Frequency** | 2 × RF frequency (60 MHz to 4 GHz) | | **Demodulation Bandwidth** | 240 MHz (at -3 dB) | | **Output IP3** | 31 dBm @ 900 MHz | | **Noise Figure (NF)** | 13.2 dB @ 900 MHz | | **Supply Voltage** | 4.75 V to 5.25 V | | **Package Type** | 24-lead LFCSP (4mm x 4mm) | --- ## 2. Functional Architecture The device operates using a specific internal structure to ensure high-precision signal processing: ### A. 2×LO Frequency Architecture Unlike standard mixers, the ADL5387 requires a Local Oscillator signal at **twice** the target RF frequency. This is because the internal circuitry uses a divide-by-2 phase shifter to generate the highly accurate 0° and 90° phases required for I (In-phase) and Q (Quadrature) demodulation. ### B. Quadrature Mixers The core contains two double-balanced mixers. These mixers multiply the incoming RF signal with the internally generated I and Q LO signals to produce the baseband outputs. ### C. Baseband Amplifiers The device includes integrated low-pass filters and output buffers, providing a differential output capable of driving typical Analog-to-Digital Converters (ADCs). --- ## 3. Application Use Cases The ADL5387 is commonly used in high-linearity communication systems: * **QAM/QPSK Demodulation:** Used in digital radio receivers to extract data from modulated carriers. * **Wireless Infrastructure:** Base stations (GSM, W-CDMA, LTE). * **Broadband Systems:** CATV and satellite terminal receivers. * **Instrumentation:** Signal analyzers and software-defined radios (SDR). --- ## 4. Part Number Breakdown The suffixing in `ADL5387ACPZ-R7` provides details about the packaging and delivery: * **ADL5387:** The base model number. * **ACPZ:** Indicates the package (LFCSP) and RoHS compliance (Lead-free). * **R7:** Indicates the tape and reel size (7-inch reel, typically 1,500 units). ---