## ADL5723ACPZN-R7: Technical Overview The **ADL5723ACPZN-R7** is a high-performance, fixed-gain, differential amplifier manufactured by **Analog Devices**. It is specifically designed for high-frequency applications, primarily serving as an Intermediate Frequency (IF) or Radio Frequency (RF) gain block. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Function** | Fixed Gain Differential Amplifier | | **Frequency Range** | 700 MHz to 3.8 GHz | | **Fixed Gain** | 20 dB | | **Input/Output Impedance** | 100 $\Omega$ (Differential) | | **Noise Figure** | ~3.5 dB at 2140 MHz | | **OIP3** | +32 dBm at 2140 MHz | | **Supply Voltage** | 3.0 V to 3.6 V | | **Current Consumption** | ~85 mA | | **Package Type** | 8-lead LFCSP (3mm x 3mm) | --- ### 2. Functional Characteristics * **Differential Architecture:** The device is fully differential, which provides excellent rejection of common-mode noise and second-order harmonic distortion. * **Internal Matching:** It features internal 100 $\Omega$ differential matching at both the input and output. This simplifies PCB design as external matching components are often unnecessary. * **Power-Down Mode:** It includes a power-down pin (`ENBL`) that reduces current consumption to approximately 2 mA when the device is not in use, making it suitable for TDD (Time Division Duplex) systems. * **High Linearity:** With a high Output Third-Order Intercept Point (OIP3), it is capable of handling complex modulated signals (like those in LTE or 5G) without significant distortion. --- ### 3. Pin Configuration (Summary) The ADL5723 utilizes an 8-lead LFCSP package with an exposed paddle (EPAD). | Pin No. | Mnemonic | Description | | :--- | :--- | :--- | | 1 | `VCC` | Supply Voltage (3.3V nominal) | | 2, 3 | `INP / INN` | Positive and Negative Differential Inputs | | 4 | `COMM` | Common/Ground connection | | 5 | `ENBL` | Enable Pin (High = On, Low = Power-down) | | 6, 7 | `OUTN / OUTP` | Negative and Positive Differential Outputs | | 8 | `VCC` | Supply Voltage | | EPAD | `GND` | Exposed Pad; must be soldered to a low-impedance ground plane | --- ### 4. Typical Applications The ADL5723 is commonly found in the following signal chain stages: * **ADC Drivers:** Driving high-speed differential Analog-to-Digital Converters. * **Cellular Infrastructure:** Used in LTE, W-CDMA, and 5G small cells and base stations. * **RF/IF Gain Blocks:** Providing stable 20 dB gain in broadband wireless systems. * **Point-to-Point Radios:** Signal amplification in microwave backhaul equipment. ---