The **LM321G-AE5-R** is a low-power, single-channel general-purpose operational amplifier (Op-Amp) manufactured by Unisonic Technologies (UTC). It is designed to be a cost-effective, space-saving alternative to the industry-standard LM324/LM358 series for applications requiring only one amplifier. --- ## 1. Key Specifications | Parameter | Specification | | :--- | :--- | | **Number of Channels** | 1 (Single) | | **Supply Voltage Range** | 3V to 32V (Single), ±1.5V to ±16V (Dual) | | **Quiescent Current** | 430 µA (Typical) | | **Gain Bandwidth Product** | 1 MHz | | **Package Type** | SOT-25 / SOT-23-5 | | **Input Bias Current** | 45 nA | | **Output Type** | Rail-to-Ground | --- ## 2. Pin Configuration (SOT-23-5) The "AE5" in the part number refers to the SOT-23-5 package. The pinout is standard for single op-amps in this footprint: | Pin Number | Symbol | Function | | :--- | :--- | :--- | | 1 | **IN+** | Non-inverting Input | | 2 | **V-** | Negative Supply (or Ground) | | 3 | **IN-** | Inverting Input | | 4 | **OUT** | Amplifier Output | | 5 | **V+** | Positive Power Supply | --- ## 3. Notable Features * **Internal Frequency Compensation:** Eliminates the need for external components to maintain stability, simplifying circuit design. * **Large DC Voltage Gain:** Typically 100 dB, providing high precision in amplification. * **Input Common-Mode Range:** Includes Ground/V-, allowing the device to sense signals very close to the negative rail without additional power supplies. * **Low Power Consumption:** Optimized for battery-operated devices and portable electronics. --- ## 4. Typical Applications The LM321G-AE5-R is commonly found in "building block" circuits where signal conditioning is needed in a small form factor: 1. **Chargers and Power Adapters:** Used for current sensing and voltage regulation loops. 2. **Sensor Amplifiers:** Boosting small signals from thermal or pressure sensors. 3. **Active Filters:** Implementing low-pass or high-pass filters in audio or signal processing. 4. **Comparators:** Can be used in non-critical low-speed comparator applications. --- ## 5. Part Number Decoding The suffix provides specific manufacturing details: * **LM321**: Basic Part Number (Single Op-Amp). * **G**: Halogen-free and RoHS compliant. * **AE5**: Package code for SOT-23-5. * **R**: Tape and Reel packaging.