The **M2115L-S08-R** is a high-performance, low-voltage operational amplifier (Op-Amp) manufactured by **UTC (Unisonic Technologies Co., Ltd)**. It is designed specifically for high-quality audio applications and signal processing in compact devices. --- ## 1. Technical Specifications The following table summarizes the key electrical characteristics of the M2115L-S08-R: | Parameter | Specification | | :--- | :--- | | **Operating Voltage** | ±1.0V to ±7.0V (or 2V to 14V single supply) | | **Operating Current** | 3.5 mA (Typical) | | **Slew Rate** | 4 V/μs | | **Gain Bandwidth Product** | 12 MHz | | **Input Offset Voltage** | 1.0 mV (Typical) | | **Package Type** | SOP-8 (Small Outline Package) | | **Mounting Type** | Surface Mount (SMD) | --- ## 2. Key Features & Functionality The M2115L-S08-R is popular in the electronics industry due to its balance between power consumption and audio fidelity. * **Low Noise:** It is engineered to minimize background hiss, making it ideal for pre-amplification stages. * **High Output Drive:** Capable of driving relatively heavy loads (up to 20mA), which is useful for headphone outputs. * **Wide Bandwidth:** With a 12 MHz bandwidth, it handles high-frequency signals without significant phase shift or distortion. * **Lead-Free (Halogen Free):** The "L" in the part number indicates it is a lead-free product, adhering to RoHS standards. * **Packaging ("-R"):** The "-R" suffix indicates that the part is supplied in a **Tape & Reel** format, intended for automated pick-and-place assembly. --- ## 3. Pin Configuration (SOP-8) The M2115L is a dual operational amplifier, meaning it contains two independent Op-Amps in a single 8-pin package. | Pin Number | Function | Description | | :--- | :--- | :--- | | 1 | OUTPUT A | Output of the first amplifier | | 2 | -INPUT A | Inverting input of the first amplifier | | 3 | +INPUT A | Non-inverting input of the first amplifier | | 4 | V- / GND | Negative power supply or Ground | | 5 | +INPUT B | Non-inverting input of the second amplifier | | 6 | -INPUT B | Inverting input of the second amplifier | | 7 | OUTPUT B | Output of the second amplifier | | 8 | V+ | Positive power supply | --- ## 4. Common Applications Due to its low-voltage capability and low noise profile, this part is commonly found in: 1. **Portable Audio Players:** MP3 players, voice recorders, and mobile DACs. 2. **Audio Preamplifiers:** Used to boost weak signals from microphones or sensors. 3. **Active Filters:** High-pass, low-pass, and band-pass filters in audio equipment. 4. **Signal Conditioning:** Used in industrial sensors where a 3V or 5V rail is common.