The **ADM7160ACPZN3.3-R2** is a specific variant of an ultralow noise, Low Dropout (LDO) linear regulator manufactured by Analog Devices. It is designed for high-performance analog and mixed-signal applications where power supply purity is critical. --- ### 1. Key Technical Specifications Below are the primary electrical characteristics for this specific model: | Feature | Specification | | :--- | :--- | | **Output Voltage** | 3.3V (Fixed) | | **Input Voltage Range** | 2.2V to 5.5V | | **Maximum Output Current** | 200 mA | | **Dropout Voltage** | 150 mV @ 200 mA (Typical) | | **Output Noise** | 2 μV rms (10 Hz to 100 kHz) | | **PSRR** | 54 dB at 100 kHz | | **Operating Temperature** | −40°C to +125°C | | **Package** | 6-lead LFCSP (2mm x 2mm) | --- ### 2. Electronic Component Breakdown #### A. Architecture (Ultralow Noise) Unlike standard LDOs, the ADM7160 uses a specialized internal architecture to achieve extremely low output noise (2 μV rms). This makes it ideal for powering sensitive components like **Phase-Locked Loops (PLLs)**, **VCOs**, and high-precision **ADCs**. #### B. The "LDO" Functionality As a **Low Dropout** regulator, it can maintain a stable 3.3V output even when the input voltage is very close to the output (as low as ~3.45V). This reduces power dissipation (heat) and improves efficiency in battery-operated devices. #### C. Control Features * **Enable (EN) Pin:** Allows the chip to be turned on or off via logic signals to save power. * **Internal Protection:** Includes thermal overload protection and short-circuit current limiting to prevent damage to the circuit. --- ### 3. Part Number Decoder Understanding the suffix codes helps in sourcing and PCB design: * **ADM7160:** Base model series. * **ACPZ:** Indicates the package type (LFCSP - Lead Frame Chip Scale Package) and RoHS compliance (Z). * **N:** Denotes the lead finish or specific versioning. * **3.3:** Fixed output voltage of 3.3 Volts. * **R2:** Packaging format (usually refers to a small reel of 250 units, compared to R7 for 3,000 units). --- ### 4. Typical Application Circuit To ensure stability and low noise, the ADM7160 requires specific external capacitors: ```c // Typical Configuration Input (2.2V-5.5V) ----[ 1uF Ceramic Cap ]---- VIN VOUT ----[ 1uF Ceramic Cap ]---- Output (3.3V) EN ---- (Logic High to Enable) GND ---- (System Ground) ``` ---