Overview
The LM348M/NOPB is a quadruple operational amplifier (op-amp) produced by Texas Instruments. It is part of the LM148 series, which is designed to provide functional characteristics identical to those of the familiar 741 operational amplifier. This device consists of four independent, high-gain, internally compensated op-amps, making it suitable for applications where multiple 741-type amplifiers are required or where high packing density is necessary.
The LM348M/NOPB is particularly useful in scenarios where low power consumption and high isolation between amplifiers are critical. It features a class AB output stage with no crossover distortion, low input offset voltage, and low input bias current, among other key characteristics.
Key Specifications
| Parameter | Conditions | Min | Typ | Max |
|---|---|---|---|---|
| Supply Voltage | ±18V | |||
| Differential Input Voltage | ±36V | |||
| Output Short Circuit Duration | Continuous | |||
| Power Dissipation (Pd at 25°C) | PDIP (NFF) | 750 mW | ||
| Thermal Resistance (θjA) | PDIP (NFF) | 100°C/W | ||
| Maximum Junction Temperature (TjMAX) | 100°C | |||
| Operating Temperature Range | 0°C to 70°C | |||
| Slew Rate | TA = 25°C | 0.5 | 0.5 | 0.5 |
| Output Short Circuit Current | TA = 25°C | 25 | 25 | 25 |
| Input Offset Voltage | RS ≤ 10 kΩ | 6.0 | 7.5 | 7.5 |
| Input Offset Current | RS ≤ 10 kΩ | 75 | 100 | 125 |
| Input Bias Current | RS ≤ 10 kΩ | 325 | 400 | 500 |
| Large Signal Voltage Gain | VS = ±15V, VOUT = ±10V, RL > 2 kΩ | 15 | 15 | 15 |
| Output Voltage Swing | VS = ±15V, RL = 10 kΩ | ±12 | ±12 | ±13 |
| Input Voltage Range | VS = ±15V | ±12 | ±12 | ±12 |
| Common-Mode Rejection Ratio | RS ≤ 10 kΩ | 70 | 90 | 90 |
| Supply Voltage Rejection Ratio | RS ≤ 10 kΩ, ±5V ≤ VS ≤ ±15V | 77 | 96 | 96 |
Key Features
- Quad 741 Op-Amp Configuration: Four independent, high-gain, internally compensated operational amplifiers.
- Class AB Output Stage: No crossover distortion.
- Low Power Consumption: Total supply current comparable to a single 741-type op-amp.
- Low Input Offset Voltage: Typically 6.0 mV to 7.5 mV.
- Low Input Offset Current: Typically 75 nA to 125 nA.
- Low Input Bias Current: Typically 325 nA to 500 nA.
- High Degree of Isolation: Excellent isolation between amplifiers, achieved through independent biasing and layout techniques.
- Overload Protection: Protection for inputs and outputs.
- Pin Compatibility: Pin compatible with the LM124.
- Gain Bandwidth Product: 1.0 MHz for unity gain.
Applications
- Audio Equipment: Suitable for audio amplifiers and filters due to its low distortion and high gain.
- Medical Devices: Used in medical equipment where low power consumption and high isolation are critical.
- Industrial Control Systems: Employed in control systems requiring multiple op-amps with high packing density.
- Automotive Electronics: Used in automotive systems where reliability and low power consumption are essential.
- Test and Measurement Equipment: Ideal for various test and measurement applications due to its stability and accuracy.
Q & A
- What is the supply voltage range for the LM348M/NOPB?
The supply voltage range for the LM348M/NOPB is ±18V.
- What is the typical slew rate of the LM348M/NOPB?
The typical slew rate is 0.5 V/μs.
- What is the maximum junction temperature for the LM348M/NOPB?
The maximum junction temperature is 100°C.
- Does the LM348M/NOPB have built-in ESD protection?
No, it has limited built-in ESD protection and requires special handling to prevent electrostatic damage.
- What is the typical input offset voltage of the LM348M/NOPB?
The typical input offset voltage is 7.5 mV.
- Is the LM348M/NOPB pin compatible with other op-amps?
Yes, it is pin compatible with the LM124.
- What is the gain bandwidth product of the LM348M/NOPB?
The gain bandwidth product is 1.0 MHz for unity gain.
- What are the common applications of the LM348M/NOPB?
Common applications include audio equipment, medical devices, industrial control systems, automotive electronics, and test and measurement equipment.
- How many op-amps are included in the LM348M/NOPB package?
The LM348M/NOPB includes four independent op-amps.
- What is the typical output short circuit current of the LM348M/NOPB?
The typical output short circuit current is 25 mA.
