## TS321L-AF5-R: Technical Overview The **TS321L-AF5-R** is a low-power, general-purpose operational amplifier (Op-Amp) designed for cost-effective and space-constrained applications. It is often considered a functional equivalent or a specialized version of the industry-standard LM321. --- ### 1. Key Technical Specifications Below are the primary electrical characteristics for the TS321L-AF5-R: | Parameter | Specification | | :--- | :--- | | **Type** | Single Operational Amplifier | | **Supply Voltage Range** | 3V to 32V (Single), ±1.5V to ±16V (Dual) | | **Quiescent Current** | ~430 µA (Low power consumption) | | **Gain Bandwidth Product** | 1 MHz | | **Slew Rate** | 0.4 V/µs | | **Input Offset Voltage** | 7 mV (Maximum) | | **Package Type** | SOT-25 / SOT-23-5 | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Core Functional Components The internal electronic architecture of the TS321L-AF5-R consists of several stages: 1. **Input Differential Stage:** Utilizes PNP transistors to allow the common-mode input voltage to include ground (0V) when operating from a single supply. 2. **Gain Stage:** Provides the bulk of the open-loop voltage gain (typically around 100 dB). 3. **Output Stage:** Designed to be short-circuit protected. It can swing near the negative rail (ground) but is not a "true" Rail-to-Rail output (it typically falls short of the positive rail by about 1.5V). --- ### 3. Pinout Configuration (SOT-25) Standard configuration for the AF5 (SOT-25) package: | Pin Number | Function | Description | | :--- | :--- | :--- | | 1 | **OUT** | Amplifier Output | | 2 | **V- / GND** | Negative Supply or Ground | | 3 | **IN+** | Non-inverting Input | | 4 | **IN-** | Inverting Input | | 5 | **V+** | Positive Supply Voltage | --- ### 4. Common Applications Due to its low power and wide supply range, the TS321L-AF5-R is frequently found in: * **Battery-Powered Devices:** Low current draw extends battery life. * **Sensor Signal Conditioning:** Used to amplify small signals from transducers. * **Current Sensing:** Low-side current sensing in power supplies. * **Active Filters:** Implementing low-pass or high-pass filters in audio or industrial equipment. --- ### 5. Part Number Breakdown * **TS321:** Series identifier (Single Op-Amp). * **L:** Low power / Low voltage variant. * **AF5:** Package code for **SOT-25**. * **R:** Tape and Reel packaging.