The **ADP7142ARDZ-1.8-R7** is a high-performance, low dropout (LDO) linear regulator manufactured by Analog Devices. It is designed to provide a stable, low-noise power supply for sensitive analog and mixed-signal circuits. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical characteristics of the device: | Parameter | Specification | | :--- | :--- | | **Output Voltage** | Fixed 1.8V | | **Input Voltage Range** | 2.7V to 40V | | **Max Output Current** | 200 mA | | **Dropout Voltage** | 200 mV (typical at 200 mA) | | **PSRR (at 10 kHz)** | > 60 dB | | **Low Noise** | 11 µV rms (10 Hz to 100 kHz) | | **Quiescent Current** | 180 µA (typical at no load) | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Physical and Packaging Details The "ARDZ-1.8-R7" suffix provides specific information regarding the physical format and shipping: * **Package Type:** 8-Lead SOIC_N_EP (Small Outline Integrated Circuit with an **Exposed Pad** for thermal dissipation). * **Tape and Reel:** The "R7" indicates it is supplied on a 7-inch reel. * **RoHS Compliant:** The "Z" indicates the device is lead-free. --- ### 3. Functional Features * **High Input Voltage:** Unlike many LDOs that cap at 5V or 12V, this part handles up to 40V, making it ideal for industrial 24V rails. * **Precision Enable:** Features a high-accuracy enable pin threshold, allowing the device to be used for power sequencing or as a programmable UVLO (Under Voltage Lockout). * **Thermal Protection:** Includes thermal shutdown and current-limit protection to prevent damage during fault conditions. * **Stability:** Optimized for use with small, low-ESR ceramic output capacitors (typically 2.2 µF). --- ### 4. Typical Application Circuit The ADP7142 is simple to integrate. Below is a conceptual representation of the pin connections: ```text [Input Voltage 2.7V-40V] ----> VIN (Pin 8) | [2.2uF Cap] --- GND | [Enable Signal] -------------> EN (Pin 5) | [1.8V Output] <--------------- VOUT (Pin 1) | [2.2uF Cap] --- GND ``` --- ### 5. Common Use Cases 1. **ADC/DAC Powering:** Its low-noise profile ensures high-speed converters maintain accuracy. 2. **Industrial Sensors:** High input voltage tolerance is perfect for 24V industrial loops. 3. **Medical Equipment:** Reliable regulation for sensitive diagnostic tools. 4. **RF Systems:** Clean power for VCOs and mixers. ---