Overview
The LM348NS is a high-performance, quadruple operational amplifier produced by Texas Instruments. It is designed to offer functional characteristics similar to the familiar μA741 operational amplifier but in a quad configuration. This device features four independent, high-gain, internally compensated operational amplifiers, making it suitable for applications where multiple amplifiers are required. The LM348NS is known for its low supply current drain, low input offset voltage, and low input bias and offset currents, which are significantly better than those of a standard μA741. It also includes a Class AB output stage with no crossover distortion and input/output overload protection.
Key Specifications
| Parameter | Conditions | Min | Typ | Max |
|---|---|---|---|---|
| Supply Voltage | ±4V | ±18V | ||
| Differential Input Voltage | ±36V | ±36V | ||
| Input Offset Voltage | RS ≤ 10 kΩ, TA = 25°C | 1.0 mV | 5.0 mV | 6.0 mV |
| Input Offset Current | TA = 25°C | 4 nA | 25 nA | 50 nA |
| Input Bias Current | TA = 25°C | 30 nA | 100 nA | 200 nA |
| Input Resistance | TA = 25°C | 0.8 MΩ | 2.5 MΩ | 2.5 MΩ |
| Supply Current (All Amplifiers) | TA = 25°C, VS = ±15V | 2.4 mA | 3.6 mA | 4.5 mA |
| Large Signal Voltage Gain | VOUT = ±10V, RL ≥ 2 kΩ | 25 V/mV | 160 V/mV | 160 V/mV |
| Gain Bandwidth Product | Unity Gain | 1.0 MHz | 1.0 MHz | 1.0 MHz |
| Slew Rate | AV = 1 | 0.5 V/μs | 0.5 V/μs | 0.5 V/μs |
| Operating Temperature Range | 0°C | 70°C |
Key Features
- Single-ended amplifier design for improved thermal-noise reduction
- High gain-bandwidth product (GBW) of 1 MHz
- Slew rate of 0.5 V/μs for high-frequency applications
- Low input bias current (30 nA)
- Ultra-low input offset voltage (1 mV)
- Dual supply operation (8 V to 36 V)
- High output current per channel (25 mA)
- Class AB output stage with no crossover distortion
- Input/output overload protection
- High degree of isolation between amplifiers (120 dB)
Applications
- Instrumentation and measurement equipment
- Industrial control systems
- Audio and video applications
Q & A
- What is the LM348NS? The LM348NS is a quadruple operational amplifier from Texas Instruments, designed with characteristics similar to the μA741 but in a quad configuration.
- What are the key features of the LM348NS? Key features include low supply current drain, low input offset voltage, low input bias and offset currents, Class AB output stage, and high gain-bandwidth product.
- What is the operating temperature range of the LM348NS? The operating temperature range is from 0°C to 70°C.
- What is the typical slew rate of the LM348NS? The typical slew rate is 0.5 V/μs.
- What is the gain-bandwidth product of the LM348NS? The gain-bandwidth product is 1 MHz.
- Does the LM348NS have input/output overload protection? Yes, it includes input/output overload protection.
- What are the typical applications of the LM348NS? Typical applications include instrumentation and measurement equipment, industrial control systems, and audio and video applications.
- What is the maximum output current per channel of the LM348NS? The maximum output current per channel is 25 mA.
- Is the LM348NS pin-compatible with other industry-standard op-amps? Yes, it is designed to be interchangeable with industry-standard LM148, LM248, and LM348.
- What is the package type of the LM348NS? The LM348NS is available in a SOIC-14 package.
