Overview
The LM348D, produced by Texas Instruments, is a quadruple, independent, high-gain, internally compensated operational amplifier. It is designed to have operating characteristics similar to the µA741 operational amplifier. This device consists of four internal built-in amplifiers, each biased with a separate power supply, allowing for excellent isolation between amplifiers through independent biasing and layout techniques that minimize thermal coupling.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Operating Temperature Range | 0°C to 70°C | |
| Input Offset Voltage | 6 mV | Typical at 25°C |
| Differential Input Voltage | ±36 V | |
| Input Voltage (either input) | –18 V to +18 V | |
| Unity-Gain Bandwidth | 1 MHz | AVD = 1 at 25°C |
| Phase Margin | 60° | AVD = 1 at 25°C |
| Common Mode Rejection Ratio (CMRR) | 70 dB | VIC = VICRmin at 25°C |
| Supply-Voltage Rejection Ratio | 77 dB | VCC± = ±9 V to ±15 V at 25°C |
| Short-Circuit Output Current | ±25 mA | At 25°C |
| Supply Current (four amplifiers) | 2.4 mA | No load, VO = VOM at 25°C |
| Crosstalk Attenuation | 120 dB | f = 1 Hz to 20 kHz at 25°C |
| Package Type | SOIC (D) | |
| Package Quantity | Reel of 2500 |
Key Features
- High-gain, internally compensated operational amplifiers with characteristics similar to the µA741.
- Low supply-current drain: 0.6 mA typical per amplifier.
- Low input offset voltage and input offset current, significantly less than those of the µA741.
- Class AB output stage.
- Input/output overload protection.
- Excellent isolation between amplifiers through independent biasing and layout techniques.
- ROHS compliant.
Applications
- The LM348D is suitable for applications where multiple UA741 type amplifiers are being used, such as in audio equipment, medical devices, and industrial control systems.
- It is ideal for applications requiring high packaging density and amplifier matching.
- Can be used in various analog circuits, including amplifiers, filters, and integrators.
Q & A
- What is the LM348D operational amplifier?
The LM348D is a quadruple, independent, high-gain, internally compensated operational amplifier designed to have operating characteristics similar to the µA741.
- What is the operating temperature range of the LM348D?
The operating temperature range of the LM348D is 0°C to 70°C.
- What is the typical input offset voltage of the LM348D?
The typical input offset voltage of the LM348D is 6 mV at 25°C.
- Can the LM348D be used in single-supply operations?
The LM348D is designed for dual power supplies and is not suitable for single-supply operations like the LM258.
- What is the unity-gain bandwidth of the LM348D?
The unity-gain bandwidth of the LM348D is 1 MHz at 25°C.
- Is the LM348D ROHS compliant?
Yes, the LM348D is ROHS compliant.
- What is the short-circuit output current of the LM348D?
The short-circuit output current of the LM348D is ±25 mA at 25°C.
- Can the LM348D replace the LM258 in a circuit?
No, the LM348D and LM258 have different pin arrangements and are not directly interchangeable.
- What is the supply current for the four amplifiers in the LM348D?
The supply current for the four amplifiers in the LM348D is 2.4 mA at 25°C.
- What are some common applications of the LM348D?
The LM348D is commonly used in audio equipment, medical devices, and industrial control systems where multiple UA741 type amplifiers are required.
