### Technical Overview of ADP7142ARDZ-R7 The **ADP7142ARDZ-R7** is a high-performance, low dropout (LDO) linear regulator designed and manufactured by **Analog Devices**. It is engineered to operate at high input voltages while maintaining exceptionally low noise and high Power Supply Rejection Ratio (PSRR). --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Input Voltage Range** | 2.7 V to 40 V | | **Maximum Output Current** | 200 mA | | **Output Voltage Type** | Adjustable (1.2 V to VIN − VDO) | | **Accuracy** | ±1% over line, load, and temperature | | **Low Noise** | 11 μV rms (10 Hz to 100 kHz) | | **PSRR** | 60 dB at 10 kHz (VIN = 7V, VOUT = 5V) | | **Package Type** | 8-Lead SOIC_N_EP (with Exposed Pad) | --- ### 2. Core Features * **Wide Input Range:** Capable of handling up to 40V, making it ideal for industrial and automotive applications where high-voltage rails are common. * **Thermal Efficiency:** The "RDZ" suffix indicates an **8-lead SOIC** package with an **Exposed Pad**. This pad must be soldered to the PCB ground plane to dissipate heat effectively. * **Stability:** It is stable with small 2.2 μF ceramic output capacitors, allowing for a compact PCB footprint. * **Protection Circuits:** * **Current-Limit Protection:** Prevents damage during short circuits. * **Thermal Shutdown:** Shuts the device down if the internal junction temperature exceeds safety limits. * **Reverse Current Protection:** Prevents current from flowing from the output back to the input. --- ### 3. Pin Configuration (SOIC-8) | Pin No. | Name | Function | | :--- | :--- | :--- | | 1 | **VOUT** | Regulated Output Voltage. | | 2 | **SENSE / ADJ** | Feedback input for setting/sensing output voltage. | | 3 | **GND** | Ground reference. | | 4 | **NC** | No internal connection. | | 5 | **EN** | Enable Input. Drive high to turn on the regulator. | | 6 | **NC** | No internal connection. | | 7 | **VIN** | Power Input Voltage. | | 8 | **NC** | No internal connection. | | PAD | **Exposed Pad** | Must be connected to GND for thermal management. | --- ### 4. Typical Applications * **Precision Instrumentation:** Due to the ultra-low noise floor. * **Medical Equipment:** Reliable power for sensitive diagnostic sensors. * **Industrial Automation:** Handling high voltage bus rails (24V systems). * **ADC/DAC Powering:** Providing clean power to data converters to maintain signal integrity. --- ### 5. Ordering Information Breakdown * **ADP7142:** Model Series. * **A:** Performance Grade. * **RDZ:** Package Designator (SOIC_N_EP). * **R7:** Tape and Reel packaging (7-inch reel).