Overview
The LM348M is a general-purpose, quadruple operational amplifier produced by National Semiconductor. It consists of four independent, high-gain, internally compensated operational amplifiers, each with characteristics similar to the classic LM741 op-amp. This device is designed for low power consumption and offers low input offset voltage, low input offset current, and low input bias current, making it suitable for a wide range of applications.
Key Specifications
| Parameter | Conditions | Min | Typ | Max |
|---|---|---|---|---|
| Supply Voltage | ±18V | ±18V | ||
| Differential Input Voltage | ±36V | ±36V | ||
| Output Short Circuit Duration | Continuous | Continuous | ||
| Power Dissipation (Pd at 25°C) | 700 mW | |||
| Thermal Resistance (θjA) | 110°C/W | |||
| Maximum Junction Temperature (TjMAX) | 100°C | |||
| Operating Temperature Range | 0°C to +70°C | |||
| Input Offset Voltage | TA = 25°C, RS ≤10 kΩ | 1.0 mV | 6.0 mV | 7.5 mV |
| Input Offset Current | TA = 25°C | 4 nA | 50 nA | 100 nA |
| Input Bias Current | TA = 25°C | 30 nA | 200 nA | 400 nA |
| Large Signal Voltage Gain | VS = ±15V, VOUT = ±10V, RL ≥ 2 kΩ | 25 V/mV | 160 V/mV | |
| Output Voltage Swing | VS = ±15V, RL = 10 kΩ | ±12 V | ±13 V | |
| Common-Mode Rejection Ratio | RS ≤10 kΩ | 70 dB | 90 dB | |
| Power Supply Rejection Ratio | RS ≤10 kΩ, ±5V ≤VS ≤±15V | 77 dB | 96 dB |
Key Features
- Four independent, high-gain, internally compensated operational amplifiers with characteristics similar to the LM741 op-amp.
- Low supply current drain.
- Class AB output stage with no crossover distortion.
- Low input offset voltage (typically 1 mV).
- Low input offset current (typically 4 nA).
- Low input bias current (typically 30 nA).
- High degree of isolation between amplifiers (120 dB).
- Gain bandwidth product (unity gain): 1.0 MHz.
- Pin compatible with LM324 and LM248.
- Overload protection for inputs and outputs.
Applications
- General-purpose analog circuitry.
- Audio and video signal processing.
- Instrumentation and measurement equipment.
- Control systems and feedback loops.
- Active filters and integrators.
- Power supply regulation and monitoring.
Q & A
- What is the LM348M operational amplifier?
The LM348M is a quadruple operational amplifier with four independent, high-gain, internally compensated op-amps similar to the LM741.
- What is the supply voltage range for the LM348M?
The supply voltage range for the LM348M is ±18V.
- What is the typical input offset voltage of the LM348M?
The typical input offset voltage of the LM348M is 6.0 mV.
- What is the common-mode rejection ratio (CMRR) of the LM348M?
The CMRR of the LM348M is typically 90 dB.
- Can the LM348M be used in single-supply applications?
No, the LM348M is designed for dual-supply operation and is not suitable for single-supply applications.
- What is the gain bandwidth product of the LM348M?
The gain bandwidth product of the LM348M is typically 1.0 MHz at unity gain.
- Is the LM348M pin-compatible with other op-amps?
Yes, the LM348M is pin-compatible with the LM324 and LM248.
- What is the maximum junction temperature for the LM348M?
The maximum junction temperature for the LM348M is 100°C.
- Does the LM348M have built-in ESD protection?
The LM348M has limited built-in ESD protection, and precautions should be taken during storage and handling to prevent electrostatic damage.
- What are some common applications of the LM348M?
The LM348M is commonly used in general-purpose analog circuitry, audio and video signal processing, instrumentation, control systems, and active filters.
