TI LM224 quad operational amplifier chip
Operational amplifiers are one of the most versatile active components in electrical and electronic circuits. Along with BJTs, JFETs, and MOSFETs, these parts serve as voltage and current drivers for numerous applications and products that span virtually every industry. In particular, Texas Instruments is a leader in manufacturing these important components. One of their legacy op-amps, described in detail in the LM224 datasheet, continues to be a popular option for circuit board designers.
LM224: Applications and Features
The LM224 is a quad operational amplifier often used for the following applications.
LM224 Applications
- Â PC motherboards
- Â PC motherboards
- Â Mobile chargers
- Â Cell phone power supplies
- Â Power supplies for network servers
- Â Uninterruptible power supplies (UPSs)
- Â Printers
- Â Air conditioner units
- Â Household appliances
- Â Inverters: AC, central, and string
- Â Voltage frequency drives
As the list above indicates, the LM224 is a general purpose amplifier that can be used in a wide range of products. These products include low-power computing devices and appliances like washing machines, dryers, and internal/external AC units.
Using the LM224 Datasheet
The LM224 adheres to the basic four op-amp rules:
OpAMP Rules:
- Â Both inputs have the same voltage potential.
- Â Input impedance is high.
- Â Output impedance is low.
- Â The component has a high gain.
These basic rules dictate how the amplifier performs in the following configurations:
Common OpAMP Configurations:
- Differentiator
- Integrator
- Comparator
- Current Limiter
- Voltage Follower
- Amplifier – inverted or non-inverted
Before designing your PCB with this component, it is crucial to consult the LM224 datasheet for necessary specifications, such as electrical characteristics and absolute maximums, which are included below.
Important LM224 Specifications
LM224 Architecture and Operation
The layout of the LM224 is shown in the figure below.\
TI LM224 functional diagram
As presented above, the LM224 chip includes over one hundred common components, with the majority being transistors. The IC diagram illustrates how the chip lends itself to any of the common op-amp configurations.
Alternatives to the LM224
The LM224 is actually one of a family of general-purpose op-amps as listed in the table below.
Comparison of TI LMXX operational amplifiers
Of the parts listed, the LM324 is a newer version of the LM224 and is recommended in some cases for new designs.
Optimizing Your LM 224 PCBA Design
In addition to the critical information presented above, the LM224 datasheet includes a wealth of helpful data, such as performance characteristics, which should inform your design decisions. This data includes the example schematic and PCB layouts, shown below.
Schematic and PCB layout examples for the LM224
For the best implementation of the LM224, the datasheet should be used in conjunction with accurate CAD models to help facilitate optimal PCBA development.
TI LM224 CAD data from UL
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