Overview
The LM348N/NOPB, produced by Texas Instruments, is a quad operational amplifier that consists of four independent, high-gain, internally compensated op amps. These amplifiers are designed to provide functional characteristics identical to those of the familiar 741 operational amplifier. The LM348N/NOPB is part of the LM148 series, which includes the LM148 and LM248, and is known for its low power consumption and high degree of isolation between amplifiers.
Key Specifications
| Parameter | LM348 |
|---|---|
| Supply Voltage | ±18V |
| Differential Input Voltage | ±36V |
| Output Short Circuit Duration | Continuous |
| Power Dissipation (Pd at 25°C) | 750 mW (PDIP), 700 mW (CDIP) |
| Thermal Resistance (θjA) | 100°C/W (PDIP), 110°C/W (CDIP) |
| Maximum Junction Temperature (TjMAX) | 100°C |
| Operating Temperature Range | 0°C to +70°C |
| Slew Rate | 0.5 V/μs |
| Output Short Circuit Current | 25 mA |
| Input Offset Voltage | 6.0 to 7.5 mV |
| Input Offset Current | 75 to 125 nA |
| Input Bias Current | 325 to 500 nA |
| Large Signal Voltage Gain | 25 V/mV (RL > 2 kΩ) |
| Output Voltage Swing | ±12V (RL = 10 kΩ), ±10V (RL = 2 kΩ) |
| Input Voltage Range | ±12V |
| Common-Mode Rejection Ratio | 70 to 90 dB |
| Supply Voltage Rejection Ratio | 77 to 96 dB |
Key Features
- Class AB Output Stage—No Crossover Distortion
- Pin Compatible With the LM124
- Overload Protection for Inputs and Outputs
- Low Supply Current Drain: 0.6 mA/Amplifier
- Low Input Offset Voltage: 1 mV
- Low Input Offset Current: 4 nA
- Low Input Bias Current: 30 nA
- High Degree of Isolation Between Amplifiers: 120 dB
- Gain Bandwidth Product: 1.0 MHz (Unity Gain)
Applications
The LM348N/NOPB is suitable for applications where multiple 741 or similar op amps are required. It is particularly useful in scenarios where amplifier matching or high packing density is necessary. These amplifiers can be employed directly in place of 741 op amps without any change in circuit performance. They are ideal for various analog circuits, including audio amplifiers, active filters, and instrumentation amplifiers.
Q & A
- What is the LM348N/NOPB? The LM348N/NOPB is a quad operational amplifier produced by Texas Instruments, consisting of four independent, high-gain, internally compensated op amps similar to the 741 op amp.
- What is the supply voltage range for the LM348N/NOPB? The supply voltage range is ±18V.
- What is the maximum junction temperature for the LM348N/NOPB? The maximum junction temperature is 100°C.
- What is the slew rate of the LM348N/NOPB? The slew rate is 0.5 V/μs.
- What is the output short circuit current of the LM348N/NOPB? The output short circuit current is 25 mA.
- What is the input offset voltage range for the LM348N/NOPB? The input offset voltage range is 6.0 to 7.5 mV.
- What is the common-mode rejection ratio of the LM348N/NOPB? The common-mode rejection ratio is 70 to 90 dB.
- What is the supply voltage rejection ratio of the LM348N/NOPB? The supply voltage rejection ratio is 77 to 96 dB.
- Is the LM348N/NOPB pin-compatible with other op amps? Yes, it is pin-compatible with the LM124.
- What kind of protection does the LM348N/NOPB have? It has overload protection for inputs and outputs.
- What are some typical applications of the LM348N/NOPB? Typical applications include audio amplifiers, active filters, and instrumentation amplifiers.
