## Overview of ADM7160ACPZN2.5-R7 The **ADM7160ACPZN2.5-R7** is an ultralow noise, Low Dropout (LDO) linear regulator produced by Analog Devices. It is specifically designed for high-performance analog and mixed-signal circuits where power supply noise must be kept to an absolute minimum. --- ### Key Specifications | Feature | Specification | | :--- | :--- | | **Output Voltage** | 2.5 V (Fixed) | | **Input Voltage Range** | 2.2 V to 5.5 V | | **Maximum Output Current** | 200 mA | | **Dropout Voltage** | 150 mV (at 200 mA load) | | **Output Noise** | 2 μV rms (100 Hz to 100 kHz) | | **PSRR** | 54 dB at 100 kHz; 40 dB at 1 MHz | | **Package** | 6-lead LFCSP (2mm x 2mm) | | **Operating Temp** | -40°C to +125°C | --- ### Technical Characteristics #### 1. Low Noise Performance The standout feature of this part is its **ultralow noise floor**. With only 2 μV rms noise, it is ideal for powering sensitive components like VCOs (Voltage Controlled Oscillators), ADCs, and precision sensors that would otherwise be degraded by switching regulator noise. #### 2. High PSRR (Power Supply Rejection Ratio) It effectively filters out high-frequency ripples from the primary power source. Even at frequencies as high as 1 MHz, it maintains a solid rejection ratio, making it a "clean-up" stage for DC-DC converter outputs. #### 3. Small Form Factor The **LFCSP (Lead Frame Chip Scale Package)** is extremely compact (2mm x 2mm), which is critical for modern mobile devices, handheld medical equipment, and dense PCB layouts. --- ### Typical Application Circuit To ensure stability and performance, the ADM7160 requires minimal external components: ```c // Basic Component Requirements - Cin : 1 μF Ceramic Capacitor (Input filter) - Cout : 1 μF Ceramic Capacitor (Output stability) - EN : Enable Pin (Connect to Vin for "Always On") ``` ### Application Use Cases * **RF and Microwave Circuits:** Powering low-noise amplifiers (LNAs). * **Medical Imaging:** High-resolution sensor arrays. * **Communication Systems:** Precision clocking and timing synchronization. ---