LM348 IC – (Quad Op-Amp) DIP-14
🎛️ LM348 IC – Quad Operational Amplifier (Quad Op-Amp) DIP-14
The LM348 is a quad op-amp IC featuring four independent, high-gain, internally frequency-compensated operational amplifiers. Designed for both analog signal processing and control applications, it’s widely used in filtering, amplification, buffering, and analog computation circuits.
This IC is pin-compatible with LM324, but optimized for low noise and better frequency response.
⚙️ Technical Specifications
| Parameter | Specification |
|---|---|
| Number of Op-Amps | 4 (Quad) |
| Supply Voltage Range | ±3V to ±18V or 6V to 36V (dual/single) |
| Input Offset Voltage | Max ±5 mV |
| Input Bias Current | ~150 nA |
| Slew Rate | 0.5 V/µs (typ.) |
| Gain Bandwidth Product | 1 MHz (typ.) |
| Output Voltage Swing | Close to ground to VCC-1.5V |
| Package Type | DIP-14 |
| Short Circuit Protection | Yes |
📌 Pinout (DIP-14)
| Pin | Function | Pin | Function |
|---|---|---|---|
| 1 | Output 1 | 8 | Output 3 |
| 2 | Inverting Input 1 | 9 | Inverting Input 3 |
| 3 | Non-Inv. Input 1 | 10 | Non-Inv. Input 3 |
| 4 | VCC (+) | 11 | Output 4 |
| 5 | Non-Inv. Input 2 | 12 | Inverting Input 4 |
| 6 | Inverting Input 2 | 13 | Non-Inv. Input 4 |
| 7 | Output 2 | 14 | VEE (−) or GND |
🛠️ Applications
Signal amplification and filtering
Sensor signal conditioning
Active filters
Voltage followers (buffers)
Audio preamplifiers
Analog control circuits
Gain = 1 + (R2 / R1)