Part Number: ADS1224IPWR

Manufacturer: Texas Instruments


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Technical Specifications of ADS1224IPWR

Datasheet  ADS1224IPWR datasheet
Category Integrated Circuits (ICs)
Family Data Acquisition – Analog to Digital Converters (ADC)
Manufacturer Texas Instruments
Packaging Tape & Reel (TR)
Part Status Active
Number of Bits 24
Sampling Rate (Per Second) 240
Number of Inputs 2
Input Type Differential, Single Ended
Data Interface SPI
Configuration MUX-ADC
Ratio – S/H:ADC
Number of A/D Converters 1
Architecture Sigma-Delta
Reference Type External
Voltage – Supply, Analog 2.7 V ~ 5.5 V
Voltage – Supply, Digital 2.7 V ~ 5.5 V
Features Temperature Sensor
Operating Temperature -40°C ~ 85°C
Package / Case 20-TSSOP (0.173″, 4.40mm Width)
Supplier Device Package 20-TSSOP


The ADS1224IPWR is a flexible low dropout voltage regulator with numerous uses. In this complete tutorial, we will look at the characteristics, specs, and potential applications of this very versatile component. This tutorial will give you with all of the necessary information whether you are an electronics hobbyist, an engineer, or someone who wants to better understand voltage control.

What is the LM1117?

The LM1117 is a well-known integrated circuit (IC) that functions as a low dropout voltage regulator. Voltage regulators are critical components in electronics because they ensure that the output voltage remains steady and within a specified range independent of changes in input voltage or load current. What distinguishes the LM1117 is its extraordinary ability to maintain constant output voltage even when the input voltage is extremely close to the desired output value.

The LM1117’s remarkably low dropout voltage of just 1.2 volts when supplying a load current of up to 800 milliamps (mA) is one of its distinguishing qualities. Dropout voltage is an important characteristic for voltage regulators since it represents the smallest voltage difference between input and output that the regulator needs to function properly. In practice, a lower dropout voltage means that the LM1117 can keep its output voltage consistent even when the input voltage is only slightly higher than the intended output voltage.

Because of this feature, the LM1117 is an excellent choice for situations in which maintaining a precise and constant output voltage is critical, such as in battery-powered devices or applications with limited power supply headroom. The LM1117’s low dropout voltage of 1.2 volts at 800 mA load current makes it a beneficial component to consider when constructing a portable electronic device or working on a project where power efficiency and voltage control are critical.

Feature Description

● Load Regulation

Load regulation is an important aspect of voltage regulators such as the LM1117 because it ensures that the output voltage remains steady and within a specified range despite changes in the load connected to the regulator. A more extensive explanation of load management and how it applies to the LM1117 voltage regulator follows:

Voltage Regulators, such as the LM1117, are used to maintain a steady output voltage despite fluctuations in input voltage and load current. Load regulation is concerned with how well the regulator can sustain the output voltage when the load (the electrical devices or components linked to the output) changes.

  • Output and Ground Pins: Load regulation in the LM1117 is concerned with the voltage between the output pin (the regulated voltage output) and the ground pin (the reference point for voltage measurement). It ensures that the voltage difference between these two pins remains consistent as the load fluctuates.
  • Output and Adjust Pins: The LM1117 additionally supports voltage adjustment through an external resistor divider linked between the output and adjust pins. Load regulation also applies to the voltage between the output and adjust pins, ensuring that the controlled voltage stays stable even when changes are performed.
  • Line Resistances: In practical applications, resistive elements in the circuit, such as wires or traces on a printed circuit board, can introduce some resistance. These resistances might alter the voltage drop between the regulator’s output and the load, thereby producing voltage mistakes or variations.

Best Load Regulation Precautions: To get the best load regulation out of the LM1117:

  • Reduce Line Resistance: To reduce voltage drop, keep the length and resistance of wires and traces between the LM1117 output and the load as low as possible.
  • Correct Grounding: To maintain a consistent reference point, ensure a robust and stable ground connection for both the LM1117 and the load.
  • Proper Heat Dissipation: When functioning, the LM1117 may generate heat, and excessive heat can impair performance. Proper heat dissipation strategies, such as the use of a heat sink, can aid in the maintenance of stability.
  • Component values that are correct: To improve stability and filtering, use the appropriate input and output capacitors.
  • Considerations for Load: Maintain correct regulation by being aware of the LM1117’s maximum rated load and ensuring that your load does not exceed this number.

In summary, load regulation is a vital part of the LM1117 voltage regulator’s functionality, ensuring that the output voltage stays constant and correct even in the presence of load variations and line resistances. Precautions such as reducing resistive parts and ensuring appropriate grounding can aid in achieving the greatest load control performance.

Device Functional Modes

To ensure safe and reliable operation, the LM1117 voltage regulators have specified device functioning modes and protection measures in place. Here’s an explanation of various modes and how protection diodes play a role:

  • Normal Operation: The LM1117 regulators do not require any protection diodes under normal working conditions. Because of the inherent resistance between the adjust and output terminals, it is safe to use even when an output capacitor is connected. This eliminates the requirement for an external diode to direct current around the regulator.
  • Transient Voltage Tolerance: The LM1117’s adjust pin can handle transient voltage signals of up to 25V with regard to the output voltage without incurring device damage. This offers some protection against voltage spikes or transients.

If an output capacitor is attached to the regulator and the input voltage is suddenly shorted to ground, the output capacitor will discharge into the regulator’s output. The discharge current is determined by the value of the capacitor, the regulator’s output voltage, and the pace at which the input voltage declines. The LM1117 is built to safely handle this scenario.

Protection Diodes

While the LM1117 normally does not require external protection diodes for regular operation, it does have inbuilt diodes between the output and input pins that act as protective mechanisms:

  • Internal Diodes (IDs): Internal diodes in the LM1117 regulators can resist short-duration surge currents of 10A to 20A in the microsecond range. These diodes guard the regulator against voltage spikes and transient circumstances.

It’s worth noting that the LM1117 datasheet includes recommendations and standards for proper operation and external component selection. While the LM1117 can operate normally and under some transient conditions without the need of additional protection diodes, it is critical to follow the manufacturer’s instructions and datasheet guidelines to guarantee safe and dependable operation. Furthermore, as stated in the published material, exceptionally high output capacitors (1,000 F or more) paired with an immediate input short to ground could potentially cause regulator damage, therefore extra caution should be exercised in such cases.


Finally, the ADS1224IPWR is a vital component that helps improve voltage regulation in a variety of applications. You may improve the stability and reliability of your electronic systems by studying its characteristics, requirements, and practical applications. This comprehensive book gives the knowledge you need to make the most of the ADS1224IPWR in your projects, whether you are a hobbyist or a professional engineer.

But don’t stop there; take the next step to realize your full potential. To obtain comprehensive specifications and make an order for the ADS1224IPWR, contact ICRFQ, your trusted source for electronic components. With the ADS1224IPWR, you can now elevate your designs, innovate with confidence, and bring your thoughts to reality. Your next breakthrough is just around the corner.

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