Overview
The LM348DT, produced by STMicroelectronics, is a quadruple operational amplifier that consists of four independent, high-gain, internally compensated operational amplifiers. These amplifiers are designed to have functional characteristics identical to those of the familiar UA741 operational amplifier. The LM348DT is particularly notable for its low power consumption and high packaging density, making it suitable for applications where multiple UA741 type amplifiers are required or where space is limited.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | ±4 | ±18 | V | |
| Differential Input Voltage | ±36 | V | ||
| Input Offset Voltage | 1.0 | 5.0 | 6.0 | mV |
| Input Offset Current | 4 | 25 | 50 | nA |
| Input Bias Current | 30 | 100 | 200 | nA |
| Input Resistance | 0.8 | 2.5 | MΩ | |
| Supply Current (all amplifiers) | 2.4 | 3.6 | 4.5 | mA |
| Large Signal Voltage Gain | 25 | 160 | V/mV | |
| Small Signal Bandwidth | 1.0 | MHz | ||
| Phase Margin | 60 | degrees | ||
| Slew Rate | 0.5 | V/μs | ||
| Output Short Circuit Current | 25 | mA | ||
| Operating Temperature Range | 0°C | 70°C | ||
| Maximum Junction Temperature | 150°C |
Key Features
- Four independent, high-gain, internally compensated operational amplifiers.
- Functional characteristics identical to the UA741 operational amplifier.
- Low power consumption, compatible with the supply current of a single UA741 type operational amplifier.
- Low input offset current and input bias current compared to standard UA741.
- Excellent isolation between amplifiers due to independent biasing and layout techniques that minimize thermal coupling.
- Available in various package types including SOIC, PDIP, and SOP.
- High packaging density, suitable for applications requiring multiple amplifiers in a compact space.
Applications
- Audio and video equipment where multiple operational amplifiers are needed.
- Industrial control systems requiring high gain and low power consumption.
- Medical devices that necessitate precise and isolated signal amplification.
- Automotive electronics where space and power efficiency are critical.
- General-purpose analog circuits where multiple amplifiers are required.
Q & A
- What is the LM348DT operational amplifier?
The LM348DT is a quadruple operational amplifier consisting of four independent, high-gain, internally compensated operational amplifiers designed to have characteristics similar to the UA741.
- What are the key specifications of the LM348DT?
Key specifications include supply voltage range of ±4V to ±18V, differential input voltage of ±36V, input offset voltage of 1.0mV to 6.0mV, and an operating temperature range of 0°C to 70°C.
- What are the advantages of using the LM348DT over a single UA741?
The LM348DT offers lower power consumption, higher packaging density, and better isolation between amplifiers compared to using multiple UA741 amplifiers.
- What are the typical applications of the LM348DT?
Typical applications include audio and video equipment, industrial control systems, medical devices, automotive electronics, and general-purpose analog circuits.
- What is the maximum junction temperature for the LM348DT?
The maximum junction temperature is 150°C.
- How does the LM348DT handle output short circuits?
The outputs can be shorted to ground indefinitely, but not simultaneously to avoid exceeding the maximum junction temperature.
- What is the slew rate of the LM348DT?
The slew rate is 0.5 V/μs.
- What is the phase margin of the LM348DT?
The phase margin is 60 degrees.
- What are the available package types for the LM348DT?
The LM348DT is available in SOIC, PDIP, and SOP package types.
- How does the LM348DT protect against electrostatic damage?
The device has limited built-in ESD protection; it should be handled with care, and leads should be shorted together or the device placed in conductive foam during storage or handling.
